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What is "Biogas"?
  • Biogas is the gas that is produced in an anaerobic digester. Biogas consists of methane and carbon dioxide and small amounts of other gases. Biogas generally contains 55%-75% methane, 45%-25% carbon dioxide, and other gases making up 1% or less of the mixture. Since biogas is derived from organic material, it is also known as "renewable natural gas."
What is "Anaerobic Digestion" and what is an "Anaerobic Digester"?
  • Anaerobic means "no oxygen." Anaerobic digestion is the process by which bacteria, which survives only in places where there is no air, breaks down organic, biodegradable material over time and converts it into biogas and natural fertilizers. An Anaerobic Digester is a large, air-tight tank that contains no oxygen. The tank is filled with organic material and maintained at an optimum temperature for anaerobic bacteria to digest the material.
What are the materials that can be digested in a Biogas plant?
  • Wasted or spoiled food, plant clippings, animal manure, meat trimmings, and sewage after it's been treated are well suited for anaerobic digestion. Theoretically, any organic material can be broken down through anaerobic digestion. Inorganic materials such as dirt, stones and engineered materials such as plastic, metal, and glass, cannot be broken down through anaerobic digestion. In addition, wood wastes cannot be digested well due to their strong fibers, which are naturally resistant to degradation.
What is organic material?
  • Organic material is anything that had life or had been produced by living creatures, and can decay. Wasted or spoiled food, vegetative waste, grass clippings, animal dung, meat or fish trimmings and sewage sludge are common types of organic material used in anaerobic digestion. Inorganic material includes stones, dirt, plastic, metal and glass which cannot be used in anaerobic digestion.
What are the materials that produce the maximum biogas output?
  • Oils, fats and food waste create the maximum biogas when used in a biogas plant. Due to this, many biogas plants make use of food waste along with manure in the digesters to increase the quantity of biogas produced. The digestion of different materials together is called co-digestion.
Does something specific have to be grown to feed into a Biogas plant?
  • Certain crops like corn, sugar beet, and grass can be used to feed biogas plants, but most organic waste materials like animal dung and food waste produce even better results than specially grown crops.
What makes a biogas plant work?
  • The microscopic bacteria, which break down the material fed into the digester, have to be living and constantly multiplying inside the digester. This bacterium requires a sufficient amount of organic feedstock and some water to live, which produces biogas. The bacteria also thrive in a warm environment without large changes in the acidity levels.
How long does it take to break down the organic material in the biogas plant?
  • It varies based on the type of organic material that is fed into the digester and the design of the digester. Simpler organic compounds, such as sugars, fats and proteins, will digest fairly quickly. More complex organic compounds such as fibrous materials like cellulose, the major constituent of paper, and waste materials of textiles made from cotton, linen, and other plant fibers may take more than a month to digest. The operating temperature of the digester too has a significant impact on the time taken for digestion.
How is Biogas used?
  • Biogas is lighter than any liquid and rises to the top of the digester. From the top of the digester, pipes permit the biogas to slowly release from the tank into a storage container. Biogas can be used to run an engine to power an electric generator in order to generate electricity or as a fuel for a boiler to generate hot water or steam. Alternatively biogas can be also be scrubbed, which means that the carbon dioxide and other non-methane contaminants are removed, leaving purer bio methane gas. Methane is the prime component of natural gas hence this scrubbed biogas can then be pressurized and injected in an existing natural gas pipeline, liquefied for storage or even used as a vehicle fuel.
Is Biogas toxic and corrosive?
  • It is not advisable to breathe biogas. Biogas, due to its high methane content, is inflammable and should be handled with caution. Some of the trace gases that constitute about 1% or less of biogas is acidic and can be corrosive to certain kinds of metals and need to be dealt with carefully.
Isn't Methane a gas which causes a greenhouse effect?
  • Methane is a greenhouse gas that is highly damaging to the environment as compared to carbon dioxide, but it is damaging to the environment only if it is released into the atmosphere to cause the "greenhouse effect." Hence people who run biogas projects are extremely careful to contain the biogas and not let it be released into the air instead it is used for energy in the form of vehicle fuel or converted into electricity. One of the benefits of anaerobic digestion is its ability to capture the methane that would normally be emitted into the atmosphere if the organic material was left to decompose in a normal uncontrolled landfill.
Is Biogas a kind of renewable energy?
  • Definitely Yes, Biogas technology is utilized all over the world to create renewable energy. Biogas produced from an anaerobic digester comprises primarily methane gas, which can be used instead of fossil fuels. This form of renewable natural gas can substitute fossil fuel natural gas for any need including heating, cooking and as a vehicle fuel. Biogas can be used as fuel to make clean electricity too. All of these options provide an opportunity to turn organic waste into a valuable renewable energy resource thus increase our earnings.
How can I get involved in promoting Biogas Projects in the form of investments or running such projects?
  • Contact us at didask@didaskbioenergy.com if you would care to learn more.

To make the world a better place to live in by the development of economic, efficient and environmental friendly energy technology solutions.


To create environmental sustainability and energy independence through the growth of the biogas industry thus reducing the dependence n fossil fuels.


Biogas is the one of the only technologically fully established

renewable energy source that is capable of producing heat, steam, electricity, vehicle fuel and other valuable byproducts. It is, in the true sense of the word, a dynamic energy source. Biogas has become a fuel to be looked forward to. This growth has begun over the last two decades.

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