Best Feedstock for CBG Biogas CNG Plants in India: Full Guide

A Compressed Biogas (CBG) plant runs on organic waste or biomass, known as feedstock. Inside the plant, bacteria break this material down without oxygen in a process called anaerobic digestion, producing biogas that is then purified into CBG.

The most commonly used feedstocks for CBG production in India include sugar mill press mud, agricultural residues such as paddy straw and maize stalks, Napier grass, and animal waste such as cattle dung and poultry litter. These feedstocks are well suited for SATAT-backed CBG projects because they offer good biogas potential and are generally available through established local supply chains. Segregated municipal solid waste (MSW) is another promising feedstock option, while its use also supports effective waste management and helps reduce the burden on urban waste-disposal systems.

Therefore, a detailed feedstock assessment should be carried out before setting up a CBG Biogas or Bio CNG plant in India.

Primary Feedstock for CBG BIO CNG Production –

Agricultural Waste: After harvesting, certain residues can be collected from crops like sugarcane waste, paddy straw, wheat straw and husk, rice stubble, damaged or spoiled grains, maize stalks, mustard, cotton, and vegetable stalks, horticulture and forestry waste.

Animal Excreta: Animal manure, such as cattle dung, poultry litter, pig, sheep, and goat manure, and livestock manure, contains a large amount of organic matter that has essential nutrients to help ensure effective anaerobic digestion process.

Energy Crops: Biogas specific crops whose biomass is high can also be cultivated, for example, Napier grass, water hyacinth, sweet sorghum and switchgrass. These crops grow very fast and give high biomass and good amount of methane.

Agro-Industrial Processing Waste: Organic wastes from industries, like sugarcane press mud and sugarcane bagasse (after juice extraction), distillery spent wash and vinasse (ethanol and alcohol distilleries), food processing waste (Potato peels, fruit pulp, dairy whey, and seafood processing scraps) and palm oil mill effluent (wastewater and empty fruit bunches from palm oil extraction)

Municipal and Urban Organic Waste: Municipal solid waste (MSW), kitchen and hotel food waste, vegetable and fruit market waste and sewage sludge can also be converted to produce CBG.