ESG Reporting Frame Work

Bio CNG: A Sustainable Energy Solution

Bio CNG (Compressed Natural Gas) or CBG (Compressed Biogas Plants) is the purified and compressed form of biogas where the methane around 92 - 98%. 

So it is just Natural Gas. Right? 

Nope, It is better than natural gas and way less harmful than that. 


For that, you need to understand what is Bio CNG and how it is obtained. 

What is Bio CNG?


Bio CNG is obtained by compressing Biogas which is a naturally produced gas through the anaerobic decomposition of biomass like agricultural waste, animal manure, residue from agro-food industries, domestic organic waste, etc. 

The main components in biogas are methane, carbon dioxide, and other gases in minute quantities like water vapour, oxygen, hydrocarbons, ammonia, etc. 

Although it is a highly combustible gaseous fuel that releases heat and energy constituents like water vapour, hydrogen sulphide, and carbon dioxide makes biogas very unsuitable to be utilized as fuel. Then how do we turn it into Bio CNG?

The Role of Bio CNG Plants

Bio CNG plants play a vital role in the conversion of organic waste into clean energy. These facilities serve as hubs for the collection, processing, and purification of biogas derived from various sources. Through advanced technologies such as biogas scrubbing, compression, and purification, Bio CNG plants ensure that the produced gas meets the quality standards required for use as a transportation fuel or for other industrial purposes. 

What are the benefits of a Bio CNG Plant?

The adoption of Bio CNG technology offers multiple benefits, both environmental and economic:

  1. Waste Management: Bio CNG plants help address the pressing issue of waste management by diverting organic waste from landfills and converting it into valuable energy.
  2. Renewable Energy Source: Unlike fossil fuels, Bio CNG is a renewable energy source that reduces dependence on finite resources and mitigates greenhouse gas emissions.
  3. Air Quality Improvement: The combustion of Bio CNG produces significantly fewer pollutants compared to conventional fuels, leading to improved air quality and reduced environmental degradation.
  4. Economic Opportunities: Establishing Bio CNG plants creates job opportunities in waste collection, plant operation, and maintenance, contributing to local economic development.
  5. Energy independence: By harnessing locally available organic waste, Bio CNG plants enhance energy security and reduce reliance on imported fuels. 

What is the Process of Converting Biogas to Bio CNG?

Biogas To Bio CNG

Bio CNG is the purified and compressed form of biogas with around 92 - 98% of methane content. The purification of biogas is essential to increase its energy potential.

Although biogas purification can be done in various ways, these are the two most commonly used methods:

Water Scrubbing: This method involves compressing the biogas under pressure before exposing it to water. Carbon dioxide (CO2) and hydrogen sulfide (H2S), which are more soluble in water than methane (CH4), dissolve in the water while methane rises to the top and is collected. The remaining liquid undergoes treatment to recover any remaining methane.

Pressure Swing Adsorption: In this technique, unwanted gases are captured by a vessel at high pressure. Methane is then collected from the top of the vessel, while the pressure is reduced to release carbon dioxide (CO2), nitrogen (N2), and oxygen (O2), similar to how fly paper sticks and unsticks when needed.

Why Choose Bio CNG Over CNG?

Choosing between Bio CNG and conventional CNG (compressed natural gas) involves considering various factors such as environmental impact, availability, and cost-effectiveness of the fuel. 

Why Choose Bio CNG Over CNG?

Here are the reasons why you should choose bio-CNG over conventional CNG: 

  • Renewable source: Derived from organic waste, reducing reliance on finite fossil fuels.
  • Reduced carbon footprint: Emission of lower levels of greenhouse gases due to recent carbon absorption by plants.
  • Waste management solution: Converts organic waste into useful energy, reducing pollution and landfill usage.
  • Potential for rural development: Stimulates economic activities in rural areas and improves living standards. 

Future of Bio CNG Plants in India

  • National Biogas and Manure Management Programme (NBMMP): Launched by the Ministry of Non-Renewable Energy, this program provides financial assistance and technical support to farmers and stakeholders for the establishment and operation of biogas or Bio CNG plants.
  • National Clean Energy Fund (NCEF): This fund offers financial support for the development of clean energy technologies, including biogas.
  • National Mission on Biogas and Organic Manure (NMBOM): The mission aims to popularise biogas as a clean and renewable energy source while also encouraging the use of organic manure in agriculture.
  • Ministry of New and Renewable Energy (MNRE): Implementing various policies and schemes, the MNRE endeavours to promote renewable energy, including biogas and Bio CNG, across India.
  • Galvanizing Organic Bio-Agro Resources Dhan (GOBAR-DHAN): This scheme targets the conversion of cattle dung and farm solid waste into Bio CNG (CBG) and compost, with plans to cover 700 projects nationwide. 


In conclusion, Bio-CNG (Compressed Natural Gas) or CBG (Compressed Biogas) is a highly purified and compressed form of biogas, primarily composed of methane, obtained through the anaerobic decomposition of organic waste materials such as agricultural waste, animal manure, and domestic organic waste. 

The future of Bio-CNG plants in India looks promising, supported by government initiatives which aim to popularize biogas as a clean and renewable energy source, reduce dependence on finite fossil fuels, and promote sustainable development practices.  If you need any information or assistance with Bio CNG plants you can contact us!