Monday, May 11, 2015

Manufacturing



Manufacturing

Overview

There is a quiet revolution taking place in manufacturing and technology in general. I am beyond saying this is good or bad, this is inevitable. Open sourced technology is where the design of a technology is made freely available. It has been going on for a long time in software, but it is now hitting manufacturing.
Here is an example of a community that is focused on sharing innovations.

3D Printing



3D printing takes digital designs and prints them in successive layers in plastic (or a variety of other feedstock). To some this may seem a geek toy, and a continuation of the madness that got us here in the first place, but it actually has far reaching implications both for economies and the environment.




Firstly we will look at what it can produce, a lot of these you might be justified in saying why the hell would I want that but the point is the diversity;

Wind turbine: http://3dprint.com/63526/3d-printed-urban-wind-turbine/
http://www.digitaltrends.com/home/useful-3d-printed-household-items/
http://www.3ders.org/3d-printer/what-can-you-make.html
http://au.askmen.com/entertainment/galleries/top-50-things-you-can-make-with-a-3d-printer-38.html
One of the most compelling reasons for continuing to read is that if you can print it, then it doesn't have to be shipped to you. Oh, and replacement parts, when older equipment fails it can become difficult to find parts.



For most of this article I am focusing on open source RepRap printers. That is self-REPlicating RAPid prototyping machines, in short, 3D printers capable of printing their own components.

http://reprap.org/wiki/Main_Page

There are many types of 3d printers available but the ones I am discussing work by a process known as Fused Deposition Modeling (FDM). Fancy name but an easy process to understand;
http://en.wikipedia.org/wiki/Fused_deposition_modeling

Now it is not essential to have your own printer, there is a company called Shapeways, Amazon too now, that will do the printing for you. You design it, they print it. But I am going to assume you want to do something as sustainable as possible.

Is it economical?
http://www.appropedia.org/Life-cycle_economic_analysis_of_distributed_manufacturing_with_open-source_3-D_printers

Is it sustainable?
If you envisage buying plastic from wholesalers then probably not. What about buying filament from your local recycling centre? Well that is better. What about recycling your own plastic waste? That is even better. Make bioplastics yourself? Hell yeah.

http://www.earthisland.org/journal/index.php/elist/eListRead/can_we_3d_print_our_way_to_sustainability/

Feedstock

This is the filament used as the material source for the printing. This is not limited to plastic, there is now a huge variety from wood pulp to icing sugar. Plastic is by far the most common, people have traditionally viewed plastic as a wasteful byproduct of the fossil fuel industry. That is true. 
The production of 1 kg of polyethylene (PET or LDPE), requires the equivalent of 2 kg of oil for energy and raw material (see here). Polyethylene PE is the most commonly used plastic for plastic bags.However, plastics are organic polymers and certain forms can be made naturally, and others can be reused. Reuse will be discussed later. Here let's talk about bioplastics, that is a form of plastic that is derived from nature.

Bioplastics themselves aren't that hard. If a kid in a kitchen could do it;

http://www.instructables.com/id/Making-BioPlastics-Environmentally-Friendly-Plast/?ALLSTEPS


Specifically the bioplastic I find most intriguing is algae based, and yes, you can do that in a kitchen as well;
http://green-plastics.net/posts/39/how-to-make-algae-bioplastic/

Finally it appears that agricultural waste can be easily converted into bioplastic;
http://www.newscientist.com/article/dn25944-an-easier-way-to-turn-plant-scraps-to-plastics.html#.VVBg1o6qpBc

Generating a feedstock locally and sustainably is very important.
"They found that making their own 3D printing feedstock used about one-tenth the energy needed to acquire commercial filament, and used less energy than recycling the plastic conventionally."
The full potential economic impact of 3D printing is discussed here;
http://3dprintingindustry.com/2014/12/06/quantitative-3dp-sustainability-study/

A cleaner environment

By reusing plastic we reduce emissions. How much? On average a 1kg of plastic requires 85MJ of energy to produce. That is 0.014 Barrels of oil or nearly 2kg. To be accurate some of that energy is contained in the material itself.
One way to make filament is to take waste plastic and put it through an extruder to create filament. That is, to recycle it. By recycling 1kg we reduce emissions 2kg. Now there will be energy required to perform the recycling, but I think it is safe to say it is better to recycle. 



To do this at home checkout the recyclebot.

"Centralized recycling of polymers is often uneconomic and energy intensive due to transportation embodied energy. This paper provides a proof of concept for high-value recycling of waste polymers at distributed creation sites."
On a cheap industrial scale the Plastic Bank has brought out the open source extruder;
http://plasticbank.org/extruder/
http://www.appropedia.org/Plastic_Bank_Extruder_v1.0

"About 15 million waste pickers worldwide collect, sort, and process recycled materials, but more often than not, they live in extreme poverty, making up some of the most disadvantaged communities on the planet. The Ethical Filament Foundation was created to address this very problem, and create a fair trade standard and certification process for the 3D printer filament industry."

http://www.techrepublic.com/article/how-recycled-plastic-for-3d-printing-will-drive-sustainability-and-raise-the-social-conscious-of-business/
http://3dprintingindustry.com/2014/12/06/quantitative-3dp-sustainability-study/


But it goes further than that. CO2 can be converted into plastic! Before getting too carried away let's state categorically that the amounts involved in no way would impact atmospheric CO2 levels. However, something is better than nothing.
http://breakingenergy.com/2014/01/30/co2-based-plastics-and-polymers-attract-powerful-investors/

Food systems

Houses?

Large homes with many people in them is highly efficient (think ants or bees). Used with Hempcrete this would be awesome;

Open source

The great thing about all this is that the technology is freely available.
http://www.appropedia.org/3-D_printer

Software Tools

Well the first is sketchup, and its free. Sketchup is where you design what you need, but you don't have to design everything yourself. Chances are that someone may have already done it for you on thingiverse. The other tool is ReplicatorG which communicates with the printer.
Here's a complete discussion on how to take a model from sketchup and print it on a RepRap printer;
http://www.instructables.com/id/Basic-workflow-for-3D-design-in-Sketchup-and-3D-pr/

Printing in metal

A lot of people automatically assume that the strength of the components is inferior, but that is not true. Graphene and nano-technologies are coming out with products lighter than steel but 200 times as strong. There is however, traditional metal printing as well.
Advanced Manufacturing Services in Sydney currently offer 3D printing of metal parts.

Conclusion

This has been a brief overview, but this technology has far reaching implications.
In 1919 Holden started manufacturing car bodies in Australia. At that time there were roughly 5 million people. The business was very successful. Now the population is at 24 million and the car industry is dying due to imports. However, at the time it was established there were no prior skills here. So everything was learned.

Once the logistics chains start to become much more expensive, then community manufacturing will boom. Personally I do not believe the logistics chains will fail completely. They will just become more and more expensive to use. So manufacturing may well become localized again, which would be a huge win for the environment.

Some of this technology is expensive, but I think there might be some confusion with the idea of going it alone vs community living. At the bottom end of the scale RepRap printers can be purchased for $500, at the higher end Jinan Xintian Technology Co., Ltd. in China offer a 3D metal laser printer for $10,000. This is not pie in the sky stuff, and it is readily available to a community. Prices are dropping very fast.They key here is that communities need to co-operate and share.

"The final verdict, then, is that 3D printing can be greener, if it's the right kind (FDM); but again, the biggest environmental win comes from sharing the fewest tools so each has the most utilization."
http://www.greenbiz.com/blog/2013/07/19/3d-printing-environmental-win

Thursday, September 11, 2014

Water

Water is fundamental to life. Historically (link), in times of drought places that have water are scenes of intense evolutionary pressure, places that don't have it are abandoned. Without it cities have been moved or deserted, civilizations have collapsed.

Plastic
In Australia plastic tanks and plastic liners must be constructed of materials that are at least of food-grade standard (compliant with AS 2070) and if the water is to be used for human consumption the plastic material must actually comply with the requirements of potable-water standard (AS/NZS4020). 
Apparently though plastic tanks make for acidic water. Acidic water reacts with copper pipes and does nasty things to you. Either flush the pipes before drinking the water or don't use plastic tanks.

Fibreglass
Fiberglass storage tanks are widely used in the chemical and food industries to store various products. For food products, the FDA (U.S. Food and Drug Administration) weighs in. Any resin used in the manufacture of food product storage needs to be FDA-approved. The ABYC mirrors this requirement in its potable water standard H-23.

Concrete
Leaches chemicals

Friday, August 15, 2014

Policy and Politics

Let me start by saying;
If you are not voting for the Green party you should.

There is simply no 2 ways about it. Free trade will kill us. Militaries are planning contingencies for climate change. Conflict is inevitable. If WWII was anything to go by, a boat on the open seas is a target. Most military's now boast submarines because the Germans showed how effective they could be. Free trade is fine while everybody is friendly, it is an experiment that will end in disaster in wartime.

If we put tariffs on importing goods, our wide screen TVs would go up in price, dramatically. Everything would go up in price for a while. Then other countries would put a tariff on importing our goods. But there's a catch, we can do without their goods, if we can make our own. But they cannot do without our minerals. They need us more than we need them. Why have free trade when the common man is being cleaned out.

Collectively the world chants free trade agreements. Privately, they are debasing their currencies. It is a recipe for disaster. We have simply given up trade wars and substituted currency wars. The way this is being fought is by printing money and national debt. At the end of the day whatever country loses will experience inflation of staple items (food), lower wages and higher taxes. Want proof? Just look at Argentina.

If Australia made its own cars, by that I mean a wholly government owned manufacturer then I would buy one rather than a gleaming high performance foreign machine. Why? Because should trade stop we will still be able to make and drive cars.  We would retain skills and the ability to feed ourselves.

We can sell our grains, minerals and meat overseas, but should international trade stop, people here will starve. Our basic staples are now grown overseas. Most products in the freezer section are either direct from overseas or packaged from overseas goods. People do not grasp how long it would take to turn an economy around to be self-sufficient.

We have shipped our skills offshore and there is no plan B.

Take the basis of our day to day lives, petrol.
Around 75% of our oil production was exported in 2012-2013. Since 2010 we have lost nearly 50% of our oil refining capacity. We are down to 4 refineries. Within a decade we will have none.Those remaining companies will decide that the costs are too high they will be closed down. Australia would export all of its oil overseas and have no refining capacity here. In 2012-13 Australia consumed 54,900 ML (megalitres) of petroleum products. Our "Stock on water" is a critical part of the Australian supply chain (1.). So that is, if there was a conflict and shipping lanes were shutdown we would have to rely on domestic stocks.
Australia meets compliance by holding 90 days worth of fuel. Think about it, only 3 months worth. Should there be a crisis don't expect there to be fuel for 3 months though. It is allocated to different departments according to priority.
Add to that, the Big Australia policy (under various names) and we have a problem. England was under rationing for 14 years during WWII. If we want to continue on the present course with fuel, then we should be investing in Thorium nuclear reactors and go electric in a major way.

Solar and wind are great but they have problems with large constant loads.
You cannot move freight interstate on a solar truck. You could with an electric freight train. We need an electric freight rail grid. This is more than just high speed rail, freight has to move and for that you need power. Liquid Fluoride Thorium reactors in a stable geological area are incredibly safe.

It should be funded by export tariffs. If they want to buy our Australian minerals then let them pay for it. If companies say that it is cheaper to do business elsewhere, let them go. The effect would be that our dollar would drop, imports would become more expensive and local industries would rebuild. The current system isn't working for us anyway. What price is being paid for our environment being dug up like a sand pit. What price is being paid for our kids losing the ability to have normal jobs.

This mantra of compete, compete, compete is costing us our quality of life. The mining companies would state that it would cost jobs, perhaps, but they want to bring in cheap foreign labour anyway. When they can't do that, they automate the mines. Seems we are losing mining jobs anyway.

Again, we should use the income from minerals to create a state-owned car company that builds small electric cars for the domestic market only. So our cars wouldn't compete overseas? I don't care, should push come to shove at least I'll be able to buy a green car and my kids will have a job. Australia's green house gas (ghg) emissions would severely drop.

Our current system of doing things is terribly short-sighted.

Democracy needs to be redefined. It is dated. I am not against the election process or the legislating of law. The problem is how policy gets formulated.
A much better approach would be a clone of stackexchange. Any policy should be posted online, people could review it and comment on it. Importantly, you can see their reputation. The comments with the most number of votes should be used to modify the policy. That is democracy. It should be that way with local councils, state and country parliaments.



1. Australian Institute of Petroleum


Monday, August 11, 2014

Natural carbon sequestration to offset the thawing permafrost

If you're not familiar with why climate change is the most pressing issue humanity has ever faced then please read this first.
There are 2 related issues in the Arctic. One is the release of carbon from the sub-sea of the Arctic ocean that is dealt with in this article. The other is the release of carbon from the permafrost which is what this article deals with.

What is the problem;
World-wide, permafrost contains 1700 billion tons of organic material equalling almost half of all organic material in all soils.[5] This pool was built up over thousands of years and is only slowly degraded under the cold conditions in the Arctic. The amount of carbon sequestered in permafrost is four times the carbon that has been released to the atmosphere due to human activities in modern time.[28] (link)
Should a substantial amount of the carbon enter the atmosphere, it would accelerate planetary warming. A significant proportion will emerge as methane, which is produced when the breakdown occurs in lakes or wetlands. Although it does not remain in the atmosphere for long, methane traps more of the sun’s heat. The Arctic region is one of the many natural sources of the greenhouse gas methane.[37] Global warming accelerates its release, due to both release of methane from existing stores, and from methanogenesis in rotting biomass.[38] Large quantities of methane are stored in the Arctic in natural gas deposits, permafrost, and as submarine clathrates. Permafrost and clathrates degrade on warming, thus large releases of methane from these sources may arise as a result of global warming.[39][40] (link)
The majority of permafrost carbon is deep. If we were to decrease emissions, use the tools nature has given us, large amounts of carbon would be sequestered and the current rate of warming would slow. That would mean the releases from the permafrost would slow.

Currently we have a situation where during summer the top layer is heated dramatically, Arctic winters are increasing at a rate of 0.34C per decade. So with the current annual average temperature of -5C we have precious little time. It will be some time before the deeper permafrost can thaw, but every decade that more carbon is released into the atmosphere the warming rate will increase.

When, not if, the permafrost melts the organic matter will be converted into CO2 and methane. The challenge is to convert this organic matter into a form that can be sequestered. There are a number of natural mechanisms that can be used to achieve this. Nature gives us the tools, why we don't we use them?

First how much carbon is there? From this CSIRO article;
Involving collaboration between scientists from Australia, Russia, the US, the UK, Canada and Europe the three-year study concluded that accounting for carbon stored deep in the permafrost more than doubles – to more than 1500 billion tonnes – previous estimates of the world’s high-latitude carbon inventory.
It is not possible for all of that carbon to be released, from here;
The amount of carbon that will be released from warming conditions depends on depth of thaw, carbon content within the thawed soil, and physical changes to the environment.[7] The likelihood of the entire carbon pool mobilizing and entering the atmosphere is low despite the large volumes stored in the soil. Although temperatures are projected to rise, it does not imply complete loss of permafrost and mobilization of the entire carbon pool. Much of the ground underlain by permafrost will remain frozen even if warming temperatures increase the thaw depth or increase thermokarsting and permafrost degradation.[4]
How much will be released per year, is at best a guess but current estimates are;
This corresponds to an average annual emission rate of 4-8 billion tons of CO2 equivalents in the period 2011-2040 
Carbon dioxide equivalent” or “CO2e” is a term for describing different greenhouse gases in a common unit. For any quantity and type of greenhouse gas, CO2e signifies the amount of CO2 which would have the equivalent global warming impact.
Best case 4, worst case, 8 billion tons of CO2e. Billions tonnes is written as Gt. Assuming the carbon is released as methane (CH4), and methane has a ratio of 1 to 25 CO2e. So this represents 8 /25 = 0.3 Gt CH4. 75% of the weight of methane is carbon so the final emission estimate is for 0.24 Gt of carbon emitted per year.

In this article I will attempt to describe the various ways in which carbon can be sequestered (stored) naturally and rapidly. This is not a purely scientific exercise with little practical value. There are simple changes we can make in our day to day lives that can dramatically affect the atmospheric carbon. These are dealt with at the end of the article. In addition there is a method proposed for a large scale re-mediation project.


Modify the permafrost ecology

This is an area where one should tread carefully. From dying poplars in China through to cane toads in Australia, messing with ecology can sometimes have far reaching implications.
Apparently as peat-lands move into drought particular high-phenolic content vegetation can move in and bind the carbon.
http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate2643.htmland here;
https://nicholas.duke.edu/news/carbon-emissions-peatlands-may-be-less-expected

The interesting consequence on increasing soil phenolic content could actually be on EEM fungi.
"In April of 2013, scientists first discovered that mushrooms could be major carbon sinks, sequestering between 40 and 70 percent of the carbon in soil, and burying that carbon deeper down in the soil than if it were coming from the decomposing leaves and needles on a forest floor."
http://thinkprogress.org/climate/2014/01/09/3137501/eem-fungus-climate/
Increased phenols inhibits the growth of some mushrooms. However, that fungi increased its tolerance when the growth media was cellulose (which is found in peatlands).
http://nopr.niscair.res.in/handle/123456789/24482

So all this is complex and inter-related and it would have been best if we had left it all alone ... but here we are. Could we seed the permafrost with high phenolic plants and lock in the carbon? The concern might be for caribou and reindeer grazing, but they already comprise lichens as part of their diet. Lichens accumulate phenol which apparently is not absorbed by the animal at all.
http://www.ncbi.nlm.nih.gov/pubmed/20033122

Soil carbon


From the excellent booklet

If the bulk density of the soil is known, it is a simple matter to relate % soil carbon to tonnes of carbon per hectare. Most Australian soils have a bulk density of between 1.0 and 1.8 grams/cm3, or expressed in another way between 1.0 and 1.8 tonnes per cubic metre. In the following example we will assume that the bulk density is 1.4 grams/cm3 or 1.4 tonnes/per cubic metre. (Note: bulk density can vary with depth, so we will assume this is an average for the 0 to 30 cm range).
This example demonstrates just how much carbon is stored in the soil at even a relatively low percentage of soil organic carbon. It also demonstrates that if soil carbon levels were improved, a significant amount of carbon dioxide could be taken from the atmosphere and stored in the soil, for a small increase in soil carbon.
In the previous example, suppose the soil carbon was increased from 2.0% to 3.0% (an increase of 1%). The extra carbon stored in this soil to a depth of 30 cm would be 42 tonnes per hectare.

So the world has 12 billion hectares of arable land, improving that soil by 1% would result in a sequestration of 504 billion tonnes of carbon. To put that in perspective, in a simplistic world, that would neutralize the entire permafrost problem in 3 decades if we achieved a 1% improvement in all soil every decade. Keep in mind that that estimate was only for the first 30cm of soil depth. Carbon has been found at significant levels down to 1.1m. However, the rate of sequestering would fall off quickly as more carbon was accumulated in the soil due to saturation.

The greatest gains would be in the most impoverished soil.

Of the 41 samples analysed, Strzelecki (1845) found …
The top 10 soils in the high productivity group had organic matter levels ranging from 11% to 37.75% (average 20%). The lowest ranking 10 soils in the low productivity group had organic matter levels ranging from 2.2% to 5.0% (average 3.72%) The soils with the highest organic matter levels also had the highest moisture holding capacity, with an 18-fold difference in capacity to hold moisture between the lowest and the highest (Strzelecki 1845).
Strzelecki’s data indicate that organic matter levels in the early settlement period were around five to ten times higher than in many soils today. The soil test data from Strzelecki is consistent with the writings of first settlers, who described soils in the early settlement period as soft, spongy and absorbent. The 1840s journal of George Augustus Robinson for example, contains numerous references to the extremely fertile and productive soils encountered by pastoralists in the mid-1800s (Presland 1970)



On a practical level. The best way to improve soil locally is to take vermicast liquid (worm pee), aerate it for 3 days, or until it foams. Then spray it onto the soil preferably late in the day. That rebuilds the soil ecosystem. If that was done with bamboo biochar dug into the soil and inoculated plants the gains are large. An article on how to inoculate your plants is here. Another permaculture one here.

The gains in improving degraded soil would be higher than that of high performing soil. Therefore, it would follow that the place with the greatest need, and creating the best gains, would be Australia.


Hemp

Hemp leads all agricultural products for its ability to sequester carbon. From this article;
... one tonne of harvested stem contains:
0.7 tonnes of cellulose (45% Carbon)
0.22 tonnes of hemicellulose (48% Carbon)
0.06 tonnes of lignin (40% Carbon)
It follows that every tonne of industrial hemp stems contains 0.445 tonnes Carbon absorbed from the atmosphere (44.46% of stem dry weight).
Converting Carbon to CO2 (12T of C equals 44T of CO2(IPCC)), that represents 1.63 tonnes of CO2 absorption per tonne of UK Hemp stem harvested. On a land use basis, using Hemcore’s yield averages (5.5 to 8 T/ha), this represents 8.9 to 13.4 tonnes of CO2 absorption per hectare of UK Hemp Cultivation.
For the purposes estimation, we use an average figure of 10T/ha of CO2 absorption, a figure we hold to be a reasonably conservative estimate. This is used to predict carbon yields, but CO2 offsets will be based on dry weight yields as measured at the weighbridge.
The roots and leaf mulch (not including the hard to measure fibrous root material) left in situ represented approximately 20% of the mass of the harvested material in HGS’ initial field trials. The resulting Carbon content absorbed but remaining in the soil, will therefore be approximately 0.084 tonnes per tonne of harvested material. (42% w/w) (5).
Using Hemcore’s UK yield estimates (5.5 – 8 T/ha) this represents 0.46 to 0.67 tonnes of Carbon per hectare (UK) absorbed but left in situ after Hemp cultivation.
That represents 1.67 to 2.46 T/ha of CO2 absorbed but left in situ per hectare of UK Hemp Cultivation.
Final figures after allowing 16% moisture (Atmospheric ‘dry’ weight) are as follows:
CO2 Absorbed per tonne of hemp stem 1.37t
CO2 Absorbed per hectare (stem) (UK) 7.47 to 11.25t
CO2 Absorbed per hectare (root and leaf) UK) 1.40 to 2.06t

Its uses 

Let's start by saying that if you choose to smoke it you are at risk of harming yourself. With that out of the way, the industrial uses of hemp are so many that I would defer to the wikipedia article rather than repeating it all here.
In modern times hemp is used for industrial purposes including papertextilesclothingbiodegradable plasticsconstruction (as with Hempcrete and insulation), body products, health food and bio-fuel.


The benefits


Hemp can be grown on existing agricultural land (unlike most forestry projects), and can be included as part of a farm’s crop rotation with positive effects on overall yields of follow on crops. This, along with super versatility in diverse soil conditions and climates, makes hemp cultivation a viable and genuine potential large scale contributor to GHG mitigation.

Human excretia

On average every day you produce 227 grams of faeces. Of that 40 - 50% is carbon. That is approximately 91 grams of carbon. It adds to 33kg per year per person. There are 7 billion of us, that means 231 million tonnes of carbon in our waste every year. Remembering the thawing permafrost will emit 0.24 Gt which is 240 million tonnes. So we would virtually be at a balance. It is time that we got serious about using the sludge from waste treatment plants to treat our soil. 
Composting toilets are a form of carbon sequestration.

Azolla


Azolla is a symbiotic plant that some 50 million years ago caused 2850ppm CO2 to be removed from the atmosphere. Azolla's carbon fixing rate is 1.86 tonnes CO2 in 1 ha per year (link).
A study of Arctic Paleoclimatology reported that Azolla may have had a significant role in reversing an increase in greenhouse effect that occurred 55 million years ago that caused the region around the north pole to turn into a hot, tropical environment. This research conducted by the Institute of Environmental Biology at Utrecht University claims that massive patches of Azolla growing on the (then) freshwater surface of the Arctic Ocean consumed enough carbon dioxide from the atmosphere for the global greenhouse effect to decline, eventually causing the formation of Ice sheets in Antarctica and the current "Icehouse period" which we are still in. This theory has been termed the Azolla event.(link)
The reason it is so effective at removing CO2 is that it reproduces at such a fast rate. First let's do the math;

  • Total surface area in the world's largest reservoirs is 28,806km^2. That is 2.9 million ha. Not all of that would be productive, but that list is only the largest reservoirs. At 1.86 tonnes per ha that means 2.9 x 10^6 x 1.86 = 5.4 million tonnes sequestered per year.
  • The Black Sea has a net positive inflow of freshwater. Given the problems of nitrogen and phosphorus in the black sea it would seem to be a good candidate as an azolla sink. Its area is 43.6 million ha. The carbon sequestered would be 81.2 million tonnes per year.
  • The great lakes have 24.4 million ha. The carbon sequestered would be 45.4 million tonnes per year.
  • The Caspian sea has an area of 37.1 million ha. The carbon sequestered would be 66.8 million tonnes per year.

Not all these sites may be suitable due to climate. If it was feasible total sequestration would be 198.8m tonnes per year, again close to a balance with the permafrost emisssions. The benefits would be cleaner water and an entirely new industry producing a range of products (below).

Given that the average person in the US produces 18 CO2 tonnes per year the scope of the problem is huge. 
However, azolla is much more than a simple tool for carbon sequestration. It has a lot of very practical uses and is a fascinating plant in its own right


Animal feed

It is palatable to: molluscs, ducks, chickens, pigs, cows, goats, sheep and rabbits (and probably lots of others too)
...azolla is finding increasing use for sustainable production of livestock feed.[17] Azolla is rich in proteins, essential amino acids, vitamins and minerals. describe feeding azolla to , chickens and egg production of layers, as compared to conventional feed. OneFAO study describes how azolla integrates into a tropical biomass agricultural system, reducing the need for inputs.[18]Azolla has also been suggested as a food stuff for human consumption. However, no long term studies of the healthiness of eating Azolla have been made on humans.[19]
The pressing question is why can it not be used for human consumption? If it could, it would change the agricultural landscape. The use of azolla in recipes appears to be limited to a small number of researchers.
From this site;
Azolla is rich in essential amino acids, proteins, vitamins and minerals and can therefore be advantageously used for animal fodder. Humans can also eat the plant; it tastes a bit like lettuce and is very healthy and nutritious. Azolla is sold in some health food stores in dried and powdered form and can easily be eaten every day as part of the salad. 
Some people are certainly getting on-board;
There is a 42-page article in the journal of Economic Botany #34 (2) 1980 pgs 111-153. There it is mentioned as a green manure, fish food and animal food including pigs. It also helps to purify water, is used in soap production and chewed to ease a sore throat. However, on page 144 it says:
"Bui* (1966) implied that with suitable processing Azolla could become a good source of human food. Dr. P. K. Singh** (personal communicatioin) wrote from Cuttack, India, that he has eaten Azolla regularly in several fried preparations; he reports that these preparations are tasty and do not cause digestive difficulties. He was taking steps to popularize the cultivation of Azolla in small trays for human consumption."
*Bui Huy Dap. 1966. Planting and cultivation of spring rice. Khoa Hoc Ky Thuat Nong Nghiop(Agricultural Science and Technology) 59: 645-653.1967. Some characteristic features of rice growing in Vietnam. Vietnamese Studies 13,Agricultural Problems 9 Rice. 2: 67-73 9 9 1971. Agronomic research. Vietnamese Studies 27, Agricultural Problems, Some TechnicalAspects 3: 73-88. 9 1976. The xuan (spring) rice as revolutionary factor in the rice production in North Vietnam 9Sel'Skokhoziastvennia Biologiia (Moscow) I l: 299-303., and Tan Nhu Nguyen. 1976. Practice of Azolla fertilization in Vietnam. Unpublished IRRIMemo based on visit to IRRI between April 15-24.
**Singh, P. K. 1977a. Multiplication and utilization of fern "'Azolla'" containing nitrogen-fixing algalsymbiont a green manure in rice cultivation. !1 Rizo 26:125-137.1977b. Azolla plants as fertilizer and feed. Indian Farming. 27: 19-22.1977c. The use of Azolla pinnata as a green manure for rice. Int. Rice Res. Newslett. 2/77.p. 7.1977d. Azolla fern plant-rice fertilizer & chicken feed. Kerala Karshakan 26: 5-6.

Fertilizer

The nitrogen-fixing capability of Azolla has led to Azolla being widely used as a biofertiliser, especially in parts of southeast Asia. Indeed, the plant has been used to bolster agricultural productivity in China for over a thousand years. When ricepaddies are flooded in the spring, they can be inoculated with Azolla, which then quickly multiplies to cover the water, suppressing weeds. The rotting plant material releases nitrogen to the rice plants, providing up to nine tonnes of protein per hectare per year.[8] (link)
This makes it a great input to worm farms and compost piles.


Prevents algal blooms in dams

Azolla is a nutrient feeder and prevents Algal blooms in farm dams as a result, keeping water more usable for stock. This is a much more important point than it would first appear. The implication is that using azolla to clean water catchment areas could prevent Algal blooms like the one in Ohio.




Grey water 

The main limiting factors on Azolla growth are salt, temperature and phosphorus. Phosphorus is plentiful in grey water. Making Azolla a perfect companion for cleaning grey water prior to its use in other areas. This site has a lot of useful information on practical applications. It removes BPA a toxic organic pollutant.
It is concluded that Azolla able remove BPA by Phytodegradation from the aqueous solutions. Since conventional methods of BPA removal need to high cost and energy, phytoremediation by Azolla as a natural treatment system can decrease those issues and it can be a useful and beneficial method to removal of BPA.(link)
It can remediate diesel polluted soil
In laboratory experiments, a consortium composed of A. pinnata-derived bacteria displayed dense growth in a 4% diesel-containing mineral salts medium and was found to lower the fluorescence from aromatic compounds by approximately 50% after 19 d. (BIODEGRADATION OF DIESEL FUEL BY AN AZOLLA-DERIVED BACTERIAL CONSORTIUM Michael F. Cohen,1 Jolene Williams,2 and Hideo Yamasaki1,3,*)

Biochar

It seems little research has been performed on converting azolla to biochar.

Reclamation of Saline Soils

Although, Azolla is relatively sensitive to salt, cultivation in saline environment for a period of two consecutive years decreased salt content from 0.35-0.15 and desalinate rate (71.4%) was 1.8 times faster than through water leaching and 2.1 times faster than Sesbania and also reduced the electrical conductivity, pH of acidic soil and increased calcium content of soil
 70 Waseem Raja et al./ International Journal of Research in Biological Sciences 2012; 2(2): 68-72 conductivity, pH of acidic soil and increased calcium content of soil

Biodegradable plastic

Could it also be used to make bioplastic (link)? There is an existing patent for exactly that process (Macrophyte-based bioplasticWO 2013029018 A1)

Bamboo



Bamboo is the world's fastest growing plant. (Azolla is a symbiotic organism so doesn't count here). The implications are enormous. A lot of the information from this site is so appropriate that I will reproduce it verbatim;
One species of bamboo, the guadua angustifolia, found in Venezuela, Ecuador, and Colombia, has been shown to grow up to 25 meters in height and 22 centimeters in diameter, with each plant weighing up to 100 kilograms (Rojas de Sánchez, 2004). This doesn’t match the stature of many trees, but it is still big enough to be significant. It is not all about size, however. How fast a plant grows has a part in determining how much CO2 it can absorb in a given time. In this respect, bamboo wins hands-down: it grows faster than many trees, growing up to 1.2 meters per day. In fact, bamboo holds the Guinness World Record for the world’s fastest growing plant.  
 ...
 Ricardo Rojas Quiroga—an environmental engineering student at the Universidad Nuestra Señora de La Paz—studied Guadua angustifolia, a species of bamboo that grows in the Carrasco National Park of Bolivia. He measured the density and masses of bamboo plants in the forest, estimating the amount of carbon stored per hectare. Rojas concluded that, in addition to forming part of one of the most biodiverse ecosystems in the world, each hectare of the bamboo forest of Carrasco National Park stores levels of carbon comparable to some large tree species such as Chinese fir and oak. This finding is consistent with that of many previous studies, a review of which can be found in this 2010 report by INBAR. ... China has a native giant species of bamboo called Moso bamboo.   
The INBAR 2010 article actually states the carbon sequestration abilities at 150 t/ha over a 10 year period in a managed bamboo plantation. It is important distinction that natural bamboo forests do not work this way. It is only when the bamboo is harvested at 5 year intervals (species and location dependent) that the levels of sequestering can be achieved.

When bamboo is harvested and not dried typically that carbon is sequestered for 80 years under normal use, however artifacts have been dug up that date back to 2,200BC, which incidentally was the world's first timetables written on bamboo. There is an incredible diversity in the uses of bamboo. 




Bamboo can be used for products  from building, to food, utensils to medicine, clothing to musical instruments, even biochar and charcoal fuels. This is exactly what we need right now. A fast growing plant, that demands to be pruned and it's uses vary from carbon neutral to a natural sequestration. Usually a bamboo plantation can be harvested within 3 years of planting, as against decades for traditional trees.

How could this be applied to the permafrost problem. There are a large number of bamboo species (more here) that are cold climate hardy. Most of the cold growing varieties are running types, normally considered invasive. The invasiveness can be managed by digging trenches around plantations. Shoots extending into the trenches are pruned. That means it is a viable plantation crop for higher latitudes. It would be a matter of balancing cold hardiness with size to find a suitable species for a financial return. In addition to that is the matter of stabilizing the soil structure to minimize erosion in the thawing permafrost, for that purpose, any species that could handle the temperatures would be appropriate. Siberian bamboo (Miscanthus sacchariflorus), while not strictly a bamboo, could be encouraged.


Of course standard bamboo is not likely to grow in the Arctic circle anytime soon, but if things continue the way they are that might not be out of the question.

Lets do the math with Moso bamboo;
there is a worst case 0.24 Gt of emissions of carbon.
A hectare of bamboo can sequester 150 tonnes of carbon over a 10 year period. So we are averaging 1.5 tonnes per year.
So that would mean 0.24Gt / 1.5t per ha/yr = 0.16 billion ha/yrs. That figure is now our constant. Using that constant we can now determine how quickly (inverse to space) we want to sequester carbon in Bamboo.


There are 14m ha currently in production between China and India.
So we have;
(0.16 * 10^9 ha/yrs) / 14 * 10^6 ha = 11.4 years to reclaim the annual emissions. So 11 years is too long, anything over 1 year will mean an accumulation of atmospheric carbon. 
For a carbon neutral balance we need 0.16 billion ha of bamboo plantations. In 2008 there was approximately 12 billion hectares of productive land. That is, 1.3% of all farmland on the face of the Earth would have to be used. Given the uses of bamboo, that is actually not that bad.

So we need to fund Bamboo plantations both in cold climate areas and in other parts of the world. The way to do this is simple, and it is something everyone can participate in. Buy bamboo products. Every product you buy, from nappies to kitchen counter tops, see if there is a bamboo derived product available.


There is a caveat. Carbon may be released from permafrost as CO2, or CH4. Limited studies have demonstrated that particular species of trees (pine, spruce and birchdo actually absorb CH4 which is fortunate as those trees are found in Boreal forests. However, little is known about the absorption of CH4 into bamboo leaves. Without further studies, Bamboo would then seem only to deal with the CO2 problem. Once converted to biochar however, it can directly sequester methane into the soil (see Biochar).


Biochar

Adding Bamboo Biochar to soils increases the soils ability to sequester CH4 from the atmosphere. Could you apply biochar to the soil to trap the CH4 methane emitting from the permafrost?

When you have water logged soils that are generating methane they have methanogenic communities of bacteria. It's the bacteria that generate the methane. This study demonstrated that Bamboo Biochar could cut CH4 emissions from water logged soils by 50%, but the conclusion was that straw biochar was actually better for the job at 90%;
... when soils were amended with biochar, CH4 emissions were reduced. CH4 emissions from the paddy soil amended with BC and SC at high rate were reduced by 51.1% and 91.2%, respectively, compared with those without biochar. Methanogenic activity in the paddy soil decreased with increasing rates of biochar, whereas no differences in denaturing gradient gel electrophoresis patterns were observed. CO2 emission from the waterlogged paddy soil was also reduced in the biochar treatments.
It also reduces entric fermentation methane from this study. 


Twelve local “Yellow” cattle with initial live weight ranging from 80 to 100 kg were assigned in a completely randomized block design to a 2*2 factorial arrangement of four treatments with three replications.  
Live weight gain was increased 25% by adding biochar to the diet DM and tended to be decreased when nitrate replaced urea as the source of NPN. DM feed conversion was improved by biochar and by urea replacing nitrate. DM feed intake was not affected by supplementation with biochar nor by the NPN source. Both biochar and nitrate reduced methane production by 22 and 29%, respectively, the effects being additive (41% reduction) for the combination of biochar and nitrate.

How would this work for permafrost areas? Trapping the CH4 at the point of emission would be ideal, however, digging in biochar throughout massive areas of Siberia would be a great challenge. It would seem better then to convert bamboo into biochar where it is grown and then distribute the biochar as a soil conditioner to farms. The soil would then act as a sink for the methane generated from the permafrost.

If you are adding biochar to soil the biochar needs to be charged. Biochar by itself is not a fertilizer, it is more like an apartment block for soil nutrients and organisms. Personally, I soak biochar in vermipost tea prior to applying to soil. To do it properly you should soak and aerate with an aquarium bubbler for 3 days. Right nutrients, right bacteria.


Mushrooms

Don't underestimate the humble mushroom, they were here first. 1.3 billion years ago they were the first land organism.


mycorrhizal fungi, can sequester carbon in the soil. This is important because carbon stored in soil over long periods can help to offset the release of greenhouse gases to the atmosphere. Most fungal species act as decomposers that elicit a net release of CO2 to the atmosphere, but mycorrhizal fungi could be a notable exception. (link)
Fungi are simply amazing. Mycorrhizal fungi will form highways in the soil. Those highways can transfer nutrients and carbon to trees. The scale of fungi activity can be significant representing 50-70% of stored carbon in a forest.
Boreal forest soils function as a terrestrial net sink in the global carbon cycle. The prevailing dogma has focused on aboveground plant litter as a principal source of soil organic matter. Using 14C bomb-carbon modeling, we show that 50 to 70% of stored carbon in a chronosequence of boreal forested islands derives from roots and root-associated microorganisms. Fungal biomarkers indicate impaired degradation and preservation of fungal residues in late successional forests. Furthermore, 454 pyrosequencing of molecular barcodes, in conjunction with stable isotope analyses, highlights root-associated fungi as important regulators of ecosystem carbon dynamics. Our results suggest an alternative mechanism for the accumulation of organic matter in boreal forests during succession in the long-term absence of disturbance. (link)

Not only were fungi the first land based organism, they are also the biggest.




That's right you are looking at it. It's right there, beneath the soil.

A mushroom of this type in the Malheur National Forest in the Blue Mountains of eastern Oregon, U.S. was found to be the largest fungal colony in the world, spanning 8.9 km² (2,200 acres) of area.[203][204] This organism is estimated to be 2400 years old. The fungus was written about in the April 2003 issue of the Canadian Journal of Forest Research. While an accurate estimate has not been made, the total weight of the colony may be as much as 605 tons. If this colony is considered a single organism, then it is the largest known organism in the world by area, and rivals the aspen grove "Pando" as the known organism with the highest living biomass. (link)
There is simply no other practical natural solution that could compare with this. The question then is, could this be used with bamboo? The conclusion from this study was Yes;
Thus, the results showed that utilization of effective AM fungi can enhance the productivity of bamboo.
You cannot miss this video.

TED video by Paul Stamets


What is required is tree planting and soil inoculation with spores. The species of tree required? Those that already exist in Boreal forests. 



Boreal forests




Pine, spruce and birch. The reason for these species is that they have been proven to sequester carbon from not just CO2, but also CH4. That is we only need to encourage and harvest what is already there. It must be harvested though, should they be allowed to age and decay the carbon is released.
From this article;
The report from the Canadian Boreal Initiative and the Boreal Songbird Initiative, entitled "The Carbon the World Forgot", estimates that the boreal forest—which survives in massive swathes across Alaska, Canada, Northern Europe, and Russia—stores 22 percent of all carbon on the earth's land surface. According to the study the boreal contains 703 gigatons of carbon, while the world's tropical forests contain 375 gigatons. 
From here, there are currently 1.6 billion hectares of boreal forests. The sequestration rate of these forests is highest in the first 20 years of the trees life. The rate is roughly 0.3 C ha/yr (link). That is, they must be extended, harvested, and replanted.


If a Mycorrhizal habitats are established in the boreal forests the carbon sequestration would be huge. This is what fungi love, decaying organic matter.
Fungi form oxalic acid C2H2O4 to breakdown matter, it does this by combining CO2 molecules. That is carbon sequestration.

Large scale remediation

Initially it may seem practically impossible to mobilize a workforce significantly large enough to fix this problem. There may be a simpler way;
Back in 1999 there was a proposal to use C-130s to drop "tree bombs".

The possibilities are amazing,” Peter Simmons told the Guardian. “We can fly at 1,000ft at 130 knots planting more than 3,000 cones a minute in a pattern across the landscape – just as we did with landmines, but in this case each cone contains a sapling. That’s 125,000 trees for each sortie and 900,000 trees in a day.” The cones in question are expertly formed to bury themselves in the soil of a deforested area at the same distance that one would want them to be if planting the trees by hand. The tree bombs don’t explode on impact but rather their casing dissolves over time and they contain a measure of fertilizer and enough moisture to ensure that the tree takes root. 
Read more: Old Military Planes to Tree Bomb Deforested Areas | Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building 
However, it should be acknowledged that, while in the right spirit, that there would be better options than using tree saplings. It would do little over the long term to resolve the problem globally;

  • Trees do not sequester carbon at the optimal rate
  • The trees have to be harvested in order for the carbon to be sequestered over the long term. That involves intense logging operations.


It would be much more effective if this was done with hemp or bamboo. Both commodities are much more suited to cottage industries. That makes much better sense for remote communities not well serviced by logistics.
Conclusion
We need to expand the use of Bamboo, extend and sustainably manage the Boreal forests. Both these actions should be done with the use of AB fungi. But most of all, we need to improve the soil.

There is a symbiotic relationship that can be enhanced between bamboo and fungi. The sequestration of carbon through either process would be significant. By using them together we could get the problem under control. There is an advantage as well when biochar is inoculated with fungi.
Obviously inoculating permafrost soil with AM fungi is a bit of a stretch for the average person, but making a difference at a personal level, is still something everyone can do. We need to;

  • Eat more vegetarian food (so the land use can be changed). Grow our own to free up land and change the demand/supply equation for farmland. 
  • We need to start using Azolla much more, particularly as food, green manure and as an energy source.
  • Where possible don't use steel, bricks or cement for building. Use sustainably farmed wood, bamboo and hempcrete.
  • Grow our own bamboo. There are clumping and running varieties. If you get the running type make sure you prepare the plot first (or you'll regret it).
  • Make biochar for your vegetable patches. Making biochar is not as hard as it sounds. What I do is use a new clean empty paint tin. Punch a hole in the side of it. Fill it with wood chips and place it in the slow combustion heater with the hole pointed towards the fire. The syngas is burnt as it escapes. What is left in the tin is biochar.
  • Buy hemp and bamboo products for everything possible.

There is no bypassing the fact that we must get CO2 emissions under control now. If the permafrost is allowed to release significant methane it would be very difficult to control.
We must begin to focus more on working with living processes. If we continue to ignore life, our ignorance will kill us. 

You would think I would finish this on a positive call to action, but unless we implement drastic changes in the way we emit CO2, and engineer a solution to the subsea permafrost the temperature will continue to warm at an increasing rate. We need a massive cultural shift.

There is hope given
 the mathematics, there is definitely hope. However given our societies fragmentation, I cannot see how we could make the necessary changes in time to mitigate some serious damage. I come back to the conclusion that we should prepare for exile, but there is definitely a solution.
If there was any government policy that should be pushed it is probably this, all seeds sold by nurseries should be inoculated, and Australia's soil needs to be repaired.
Perhaps Australia needs a new special visa. It could be called the EDP visa for Eat, Dig a hole and Poop.