Energy autarky at home with low investment is possible.
Fossil fuels as oil and gas are getting raw and burden the athmosphere with carbon dioxide. As the anthropogenic greenhouse effect causes global warming we are charged to develop CO2 neutral heating methods. Using waste organic material for heating offers great potential to save carbon emissions.
This page deals with possibilities of anorganic digestion to produce storeable methane at different levels from micro scale for househols up to big scale used in industrial applications for power and heat production. It offers diverse options for small scale applications for decentralized use.
In the focus are:
- production of electric energy and heat at home
- recycling of organic material to save landfill space
- substitute carbon dioxide emitting fuels
- minimize energy costs for production, procession and transport of fuels
The easiest way is
"You just put about three buckets of manure into a sealed oil drum. Put a small oil heater under the drum to keep the manure at a steady 80 degrees. There are two microbes in the manure which, when heated, eat each other - this produces the gas. You can collect the gas in bottles or in plastic balloons for storage. Then all you do is feed the methane through an adapter into your carburetor - and you've got chicken power. I keep replenishing my manure supply. I run my car for about six months before I clean out the tank and start with fresh dung." (Put a chicken in your tank by Harold Bate, 1971).
Continue reading on micro digesters
Advantages and Benefits of Biogas
- Provides a non-polluting and renewable source of energy.
- Efficient way of energy conversion (saves fuelwood).
- Saves women and children from drudgery of collection and carrying of firewood, exposure to smoke in the kitchen, and time consumed for cooking and cleaning of utensils.
- Produces enriched organic manure, which can supplement or even replace chemical fertilizers.
- Leads to improvement in the environment, and sanitation and hygiene.
- Provides a source for decentralized power generation.
- Leads to employment generation in the rural areas.
- Household wastes and bio-wastes can be disposed of usefully and in a healthy manner.
- The technology is cheaper and much simpler than those for other bio-fuels, and it is ideal for small scale application.
- Dilute waste materials (2-10% solids) can be used as in feed materials.
- Any biodegradable matter can be used as substrate.
- Anaerobic digestion inactivates pathogens and parasites, and is quite effective in reducing the incidence of water borne diseases.
- Environmental benefits on a global scale: Biogas plants significantly lower the greenhouse effects on the earth’s atmosphere. The plants lower methane emissions by entrapping the harmful gas and using it as fuel.
Disadvantages of Biogas
- The process is not very attractive economically (as compared to other biofuels) on a large industrial scale.
- It is very difficult to enhance the efficiency of biogas systems.
- Biogas contains some gases as impurities, which are corrosive to the metal parts of internal combustion engines.
- Not feasible to locate at all the locations.
There are different construction types sorted by ascending volume
- jar / plastic bottle
- barrel – batch / cont. (inlet/outler, tar lined, neoprene foil, bucket)
- HDPE / plastic tin (biorealis.com/digester/construction.html)
- long foil
- cylinder plant
- double membrane gas dome as storage
- covered lagoon digesters