another Kind of power or ComPost-Modernism
Permaculture Has Its Genesis in the visionary work of J. Russell Smith, J. Sholto Douglas, Robert Hart, and others less well known, who, two generations ago and more, realized the crisis of transforming the basis of agriculture through the use of trees and other perennial crops. They saw the progressive devastation of land that followed the plow and knew that only by integrating forestry and farming could man's impact on the Earth be tempered and hope for humanity's future be secured into the next century.
another Kind of power or ComPost-Modernism
Following the revelations of ecologist H. T. Odum (I) on the qoute of energy, a third leg was added to this vital synthesis as David Holmgren so trenchantly expounds in his essay power and Permaculture (2). It was for Holmgren, a young trainee of fabricate at Hobart. Tasmania, and his unlikely mentor, Bill Mollison a bushman turned university professor, to set forth a systematic and practical advent to implementing these new understandings. Permaculture emphasized redesign of the domestic landscape or self-reliance, construction the genius of the local and the private into this triune and revolutionary shift.
Though widely acceptable by both traditional and post-modern peoples around the world, permaculture has been largely ignored by governments and institutions, to which its indispensable message is anathema. The vacuum of lawful keep has obscured the scope and extent of this revolution in man's relation to the land. It is important therefore, for those of us promoting permaculture concepts and systems to realize that the elaboration of the permaculture fabricate system, though traditional to Holmgren and Mollison, was neither isolated nor unique, but contemporary with a range of parallel creative work in other western countries.
Rummaging my bookshelf for inspiration on power in making ready for this issue, I came over evidence for a similar ideation in a slender thesis by Ida and Jean Pain, someone else Kind of Garden. First published in 1973 and in a fifth edition by 1979, this little book documents the work and methods of M. Pain with brushwood compost.
A Little-Known Visionary
Pain was a habitancy scientist in Occitania, that fabled and historic region in the south of France, whose political fate has long been submerged within the French state, but whose spirit is still restive. contemporary with Bill Mollison. Pain was involved with the devastation of the Mediterranean forest by fire, a final process of dehumification of soils that began thousands of years ago with the introduction of grazing animals and cereal cropping. He experimented with the production of compost from brushwood thinnings of the garrigue, France's sclerophyllic (dry loving) southern forest. By progressive applications of this compost and careful mulching to keep moisture, Pain demonstrated and recorded in great detail that high quality vegetables could be grown without irrigation in these dry soils. He added speculated that the forest itself could he regenerated by selective use of the same material.
What sets Jean Pain apart from Sir Albert Howard or other advocates of compost for gardening are two important elements, First. Pain placed the source of humic material in the forest and not in agriculture. In this way Pain pointed to a way of making efficient the vast scrubland and dry forest regions of the sub-temperate and sub-tropic regions, areas of the planet blessed by abundant sunshine and long busy by humans, but whose soils were exhausted before the contemporary age. Second, motivated by a profoundly post-modern comprehension of global reserved supply limits, he involved himself with the production of industrially beneficial power from this basic earth resource. In this way he offers a bridge in the middle of traditional livelihoods based in shifting cultivation or nomadic herding, and a more modern, prosperous, and placed way of life. He also shows westerners a way out of the dilemma of dependence on fossil fuels.
Why then have we not a great knowledge of this important man and his work? The answers are any and should surprise us little. Jean Pain worked independently in a rural region. He was affiliated with no university or government. Though French is a world language, it is no longer the important tongue of science and has been eclipsed by English as the lingua franca of cultural innovation. Pain's small, didactic volume was self-published, and its translation into English was awkward, the text difficult to read. Though Pain networked with other researchers in francophone Europe and in California, the extent of his outreach appears to have been limited. He was essentially an agronomic scientist and inventor, without the personality which might have enabled him to publicize and propagate his ideas. And, more broadly, his creative work, like so much innovation in power technology, was marginalized by the worldwide conservative reaction of the l980's which sought to deny the implications of the oil shocks of the previous decade.
Let's look at Jean Pain's methods and try to assess what sort of inheritance he has left us as we enter the 21st century.
Pain lived in Provence and realized the limitations of what Alan Savory (3) has called "brittle environments," those characterized by extended seasonal drought. Absent herds of large animals to process the biomass into a form ready to soil organisms, organic matter tended to cycle more often through fire than through earth, exaggerating the loss of carbon from soils already depleted and subject to high temperatures for much of the year. While Savory, and his intellectual predecessor Frenchman Andre Voisin, emphasized laberious grazing by herd animals, Pain faced a dry titanic landscape where resinous plants were dominant. Unsuitable for most grazing animals, the brush-wood, which amounted to as much as 50 ton / hectare (20 ton / acre) was a huge depot of vaporing fuel for an ever-increasing number of human-caused fires scourging the Mediterranean littoral (seashore).
A contemporary Prometheus, Pain sought to domesticate this demon for human use. His studies had revealed the indispensable difficulty of humus and its role in soil fertility. The creation of long-chain carbon molecules by a biological alchemy made soils and the environments based on them, more supple, great capable of holding magic substance could be "cultured" by providing supportive conditions for bacteria and fungi to suck up plant material: ample moisture, controlled atmosphere and temperature and the continuous diffusion of oxygen into the mass were sufficient.
But though the raw material was abundant in the Provencal forests, its collection required chainsaws and motorized transport, and its processing required grist to increase the covering area and railroad breakdown. collection and grist required industrial fuels and machinery, albeit simple: trucks, tractors, power saws. How then to close this economic and power loop? By capturing power from the composting process.
Alternate power Paths
Jean Pain articulates two basic biochemistries: a familar one, that in the nearnessy of oxygen, cellulose and lignins in woody material break down (or build up) to humus; and one less familiar, that suspended in water, anaerobically, and held at 36°C (97°F) the same woody material will keep bacteria that produce methane gas. (Only slightly different processes are required to yield wood alcohol, yet a third beneficial substance.)
Methane--natural gas--is an industrial fuel. It can provide combustion power for cooking and space heating, but it can also run motors. Convenience in converyance and for vehicle use dictates compressing the gas, but this too is potential with methane-generated electricity and simple compressors. The nimble French inventor set out to link all these processes by the indispensable technical elements.
Since his first aim was the rejuvenation of the soil, Pain devoted himself first to the perfection of the compost pile. Manual making ready of the material required that it be superior from small branches (less than 8mm thickness) and leafy matter. The nearnessy of chlorophyll (and we know also enzymes and other nutritive substances) enhanced decomposition to humus (4). In the case of advanced composting a smaller thickness was desired (less than 1mm), with long thin fibers preferable to short thick pieces. He reports that machinery that shaves rather than chips the branches and limbs is preferred.
Obviously, considerable machinery is required to macerate small tree trunks and limbs, and Pain spent indispensable concentration developing prototypes. One of these, a tractor-driven model, was awarded fourth prize in the 1978 Grenoble Agricultural Fair. The brushwood shavings must then be saturated with water. A cubic meter of woody material will suck up up to 700 liters of water over three days if continuously moistened. Mindful of conserving this costly resource, Pain dug trenches before construction his piles in order to drain away excess water which he then pumped hack into the process. A large heap (75 cubic meters, about 50 tons) of this material could be obtained from a hectare of careful forest thinnings (35-40 tons). This would both heighten the condition of the forest while providing humic manure enough to one hectare of cereal cultivation.
Compost piles properly made, of course, heat up. Reaching 60°C (140°F), a heap of this volume would ferment for up to 18 months and provide (through a simple plastic coil embedded in the pile) heated water for domestic use throughout the run of the reaction. Pain reports that he heated his five--room house of 1000 quadrate feet (100 m2) and in case,granted hot water (at a rate of 4 liters! minute) for its occupants from a 50 ton pile for six months, but that a 12 ton pile maintained that production for a full 18 months.
After testing horizontal and vertical coils. Pain terminated that a circular coil or series of concentric circular coils was the best fabricate for extracting heat from a compost consistent with ease of constructing and deconstructing the pile.
Jean Pain continued to refine his technologies. The shredder he devised was later fitted with a recirculating chute for ease of handling the brushwood shavings while obtaining the fineness required. Having proven the utility of heating water (and spaces) with brushwood compost, he experimented with heating air for greenhouses.
And to make a fully honest farmer of himself, Jean Pain insisted on meeting the power requirements of his harvest and processing machinery, so he turned his concentration to the production of gas by methanogenesis. Referring to the work of Ducellier, Isman, John Fry, Sauze, and others, Pain touches only lightly on the technical aspects of gas generation, preferring to article his findings relative to the brushwood source material. Five kilograms of finely shredded brushwood compost yield about 1 cubic meter of methane--about 5,500 kcaI--equivalent to about half a liter of high-grade petrol in power content. The gas generated by the fermentation of brush-wood requires a simple filtration--which he does not elaborate but which is presumably referenced in the literature--before it can be compressed and applied to motorized converyance (a simple carburetor adjustment for a acceptable gasoline engine) or electricity generation. As the photos in his book attest, Jean Pain in fact advanced or adapted machinery to run from this fuel.
An important amelioration in technique for methane production was to embed the gas-producing tank (a sealed plastic tub of 4m3 volume) surrounded by coiled plastic pipe, in a Compost heap. The plastic coil conducted water around the gas tank while serving as a heat exchanger. By regulating the flow of water, the temperature of the gas reactor could be regulated to optimize gas production, which in this example was about 1300 liters per day. The now warmed water of procedure was used for heating the house. Jean Pain connected this provide to a warehouse depot of 36 innertubes. These in turn fed the domestic cooking devices and supplied gas to a compressor run on electricity from a methane powered generator. The compressed gas supplied motive power for the farm truck, while the generator also ran lights in the house.
The results are impressive. From a hectare of fire-prone and unproductive forest, 50 tons of agricultural fertilizer can be derived along with the power equivalent in fluid form, of 4000 liters of high-grade petrol. This power can he channeled to the harvest and processing of the woody material, and the whole can be terminated while providing paid employment and a modest behalf from the sale of gas and humic manure--by any part a true permaculture!
Pain calculates the economics of a theoretical 1000 hectare unit managed agreeing to his methods and estimates that process power required is 12% of power yield, while counting in all inputs, ores, metallurgy, wood, implements, and so on, 26%; that equipment can be paid for in five years and the financing, together with interest, retired within 10. All the while 16 habitancy will be employed at good wages.
Some Caveats
Pain continued innovating and refining his methods through at least 1979 (when the fifth edition of his hook was published). He inspired the creation of a technical town in Belgium (5), and reported pending feel with municipal officials in Seattle, Washington who were curious in applying his methods to process urban wastes. A cooperative enterprise had been formed for the fabricate of brushwood shredding machinery, but interestingly its address has been scratched out from my copy of the book. What has become of him and his work is unknown to me. In the procedure of 15 years he learned a great deal of the technical requirements of his art, all directed toward addition the yields and efficiencies of the process, hastening the cycle from cutting of brush to application of compost to soil, recycling material internally (he used aged compost to originate methane, then recycled the residue to soil).
His aim throughout was improvement of forest health. Though I have emphasized in this synopsis the technical aspects of his invention and the industrialization of brushwood compost, Pain himself stresses the importance of sensitive harvesting of the woody material: careful pruning, thinning, and felling are indispensable to a thriving result. In his own words: "This research, then, which was begun in 1964 in the Central Var district and which was aimed primarily at enabling a family of highly modest means first to get by and then live normally in the forest, has today led to the production of power in the form of electricity obtained by means of simple techniques, this not being our purpose at the outset."
Pain's work points out the need for added innovation and elaboration of techniques for producing methane and alcohol from woody material. Implied are an array of methane or alcohol-driven motors of discrete sizes for everything from power tools to generators, converyance vehicles, and farm and earthmoving machinery. These are simple fuels, in effect derived horn organic materials and thus capable of thorough production and use They are ready substitutes for most of the liquid petroleum-based fuels now used by industrial civilization, and as such arc compatible with a level transition away from centrally controlled energy. Though wind and solar will play an important role in a gradual shift of power sources, there is little promise of either the major revolution in motive technology or of a rapid restructuring of the built environment that would allow us to shift our heavy dependence on converyance to these well advanced renewable power sources.
Much interest of late has gone towards the process of converting waste cooking oils into biodiesel. While this is challenging and creative, it seems inherently little in its applications, primarily because of the relative scarcity of the source material. Nothing like a enough quantity of spent cooking fat is ready to provide enough converyance power for the entire population, even at vastly reduced levels of power use. Also, the production of industrial cooking oils is primarily monocultural and inherently devastating to titanic areas of the planet. Biologically, production of oils requires a more complicated and less efficient power pathway than plant production of cellulose and ligneous material.
There will all the time be many hundreds, if not thousands of times more woody material than oil produced. In addition to the basic phytochemistry, there is the geographic argument: many millions of acres of land are unsuitable for arable crops, are degraded forest of low yield, or are wastelands wrecked by agriculture or toxic chemicals. We need technologies for deriving economic yield from the restoration of these lands. We also need simple technologies to break the monopoly of the fossil fuel industries.
It was the genius of Jean Pain to grasp the indispensable qoute of the age and throw himself into seeing simple and acceptable technical solutions for it (even if, by his admission, he did not know all of what he would do at the outset). That these solutions find their most efficient application at a modest and very local scale is a boon to the world and has everything to do with Pain's traditional intent. The communal and labor arrangements, capital financing, and technology required to yield beneficial and commercially indispensable power and fertilizer for private and community-scale application from restorative forestry are within the reach of large numbers of habitancy and groups throughout the world.
What is needed now is for indispensable numbers of habitancy to realize and take accountability for our continued use of liquid fuels in transport, power for domestic heating and hot water, and to realize that the garage and thriving transition to a sustainable economy requires us to fabricate locally controlled and biological sources for these energies, based on simple, widely ready and applicable technologies.
Notes
1. Odum, Howard.T. And Eugene C. Odum. The power Basis for Man and Nature. McGraw Hill, 1981.
2. Holmgren, David. "Energy and Permaculture." Permaculture Activist #3 1 May, 1994.
3. Savory, Allan. Holistic reserved supply Management. Island, 1989.
4. Celine Caron. "Ramial Wood Chips," Permaculture Activist #29/ 30, July, 1993.
5. Jean Pain Committee International, 18, Avenue Princesse Elizabeth, 1030 Brussels, Belgium tel. 32-2241-08-20 or 32-52-30-01-66.
The author admits to no great familiarity with either the production or use of biogas, only a keen interest based on need. He would like to thank Emilia Hazelip for her timely suggestion to investigate the subject, and offers his sincere appreciation to Ida and Jean Pain for their pioneering efforts.
share the Facebook Twitter Like Tweet. Can you share super fast reply another Kind of power or ComPost-Modernism.
No comments:
Post a Comment