What is a Bio-Gas? A guide to beginers :

Natural Resources


Bio gas is a naturally produced gas obtained from the decomposition of organic waste. Organic waste such as food scraps and animal waste when breaks down in an oxygen free environment they release a blend of gases, primarily methane and carbon dioxide.


This process of producing bio gas is also known as anaerobic digestion (Anaerobic digestion is a series of biological processes in which microorganisms break down biodegradable material in the absence of oxygen)

All organic wastage such as animal wastage, food scraps, waste water and sewage are all capable for producing gas by the process of anaerobic digestion. Due to high content of bio gas, it is combustible and therefore illuminates a deep blue frame and can be used as a natural source of energy

The Ecology of Bio Gas

Bio gas is known as environmental friendly source of energy because it mitigates two of the major environmental issues simultaneously:

  • The prevailing global wastage leads to execution of dangerous gas i.e methane each day
  • The dependence on fossil fuel in order to meet the global demand for energy

When we are using this organic wastage in producing bio gas we are protecting the nature by preventing it from soil pollution, water and air pollution that have been a major problem of current environment.Moreover bio gas usage doesn’t requires fossil fuel extraction to produce energy. Instead biogas converts the problematic gas into a much safer form which benefits in creating energy.

Biological breakdown

Now let us understand how this bio gas is produced from the organic waste. To produce this bio gas , organic matters ferments with the help of bacterial communities. Four stages of fermentation converts organic wastage  from initial composition to bio gas state.

  1. The acideogenic bacteria convert sugars and amino acids into carbon dioxide, hydrogen, ammonia, and organic acids.
  2. At the third stage the acetogenic bacteria convert the organic acids into acetic acid, hydrogen, ammonia, and carbon dioxide, allowing for the final stage- the methanogens.
  3. The first stage of the digestion process is the hydrolysis stage. In the hydrolysis stage insoluble organic polymers (such as carbohydrates) are broken down, making it accessible to the next stage of bacteria called acidogenic bacteria.
  4. The methanogens convert these final components into methane and carbon dioxide- which can then be used as a flammable, green energy

Advantage of Bio Gas

Free medium of energy

Subtraction of indoor air pollution and deforestation

Curtailment of workload in collecting firewood and in cooking

Limited affair skills or maintenance required

Devote to contracting the discharge of gases that grant to global warming

Deforestation and soil erosion can be minimize

Cooking on biogas is expeditious and effortless than cooking with firewood



Shiban Deb


Copyright SUVIDHA 2018


SUVIDHA abbreviated as Society for the Upliftment of Villagers & Development of Himalayan Areas is a non-profit, rural development and voluntary organization founded in the year 2004 which aims at eliminating poverty, unemployment, poor health and illiteracy for 60% of citizens who still live in the backward areas of the nation. With over 13 years of experience in managing government/private sector projects, Suvidha is well equipped with the manpower and expertise to deliver holistic solutions in the field of Agriculture, Rural development, Women Empowerment, Education and Health.

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