an aggregate capacity of 37,016 cubic meters per day, of which 2 projects were successfully commissioned by December 2011. India commissioned a further 158 projects under its Biogas-based Distributed/Grid Power Generation program, with a total installed capacity of about 2 MW. In 2018, India has set a target of producing 15 million tons of biogas/bio-CNG by installing 5,000 large-scale commercial-type biogas plants which can produce daily 12.5 tons of bio-CNG by each plant. As of May 2022, nearly 35 such plants are in operation. Rejected organic solids from biogas plants can be used in coal plants after torrefaction. Biogas is primarily methane, and can also be used to generate protein-rich feed for cattle, poultry and fish by growing Methylococcus capsulatus, a bacterium that grows directly on methane. This can be done economically in villages with low requirements for land and water. The carbon dioxide gas produced as a by-product from these units can be used in cheaper production of algae oil or spirulina from algae cultivation, which may eventually substitute for crude oil. Using biogas for protein-rich feed production is also eligible for carbon credits as this sequesters carbon from the atmosphere. There is significant potential to extract useful biomass from breweries, textile mills, fertilizer plants, the paper, and pulp industry, solvent extraction units, rice mills, petrochemical plants and other industries. The government is exploring several ways to use agro waste or biomass in rural areas to improve the rural economy. For example, biomass gasifier technologies are being explored to produce power from surplus biomass resources such as rice husk, crop stalks, small wood chips and other agro-residues in rural areas. The largest biomass-based power plant in India at Sirohi, Rajasthan has a capacity of 20 MW. During 2011, India installed 25 rice husk based gasifier systems for distributed power generation in 70 remote villages of Bihar, including a total of 1.20 MW in Gujarat and 0.5 MW in Tamil Nadu. In addition, gasifier systems were installed at 60 rice mills in India. Geothermal energy India's geothermal energy installed capacity is experimental, and commercial use is insignificant. According to some estimates, India has 10,600 MW of geothermal energy available. The resource map for India has been grouped into six geothermal provinces: Himalayan Province – Tertiary orogenic belt with tertiary magmatism Faulted blocks province – the Aravalli range, Naga-Lushi, the west coast regions, and the Narmada-Son lineament. Volcanic arc province –