CSIR‑IICT technology powers India’s compressed biogas scale-up

The Council of Scientific and Industrial Research – Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, has developed the Anaerobic Gas Lift Reac...

What Happened

The Council of Scientific and Industrial Research – Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, has developed the Anaerobic Gas Lift Reactor (AGR) technology, a high-rate biomethanation process that converts organic waste — including market waste, farm residue, and sewage — into Compressed Biogas (CBG) and bio-manure.
The technology has achieved commercial-scale deployment, with over 30 AGR installations operational across India, and industry partners operating under CSIR-IICT licences have expressed interest in scaling to the CBG stage.
CSIR-IICT developed the technology in collaboration with public sector oil marketing companies BPCL and GAIL-India, aligning with the government's SATAT scheme targets for national CBG deployment.
An integrated model plant at CSIR-IICT's Hyderabad campus demonstrates simultaneous treatment of 100 litres/day of sewage and 250 kg/day of organic solid waste to produce biogas, bio-manure, and reusable water — embodying circular economy principles.
The innovation addresses India's twin waste crises — agricultural residue burning and urban organic waste accumulation — while boosting farmer incomes through sales of CBG and bio-fertiliser.

Static Topic Bridges

Compressed Biogas (CBG) and the SATAT Scheme

Compressed Biogas is biogas (primarily methane) produced from the anaerobic digestion of organic matter, purified and compressed to properties similar to Compressed Natural Gas (CNG), with a calorific value of approximately 52,000 KJ/kg. The SATAT (Sustainable Alternative Towards Affordable Transportation) scheme, launched on October 1, 2018, by the Ministry of Petroleum and Natural Gas, aims to establish 5,000 CBG plants nationwide producing 15 million metric tonnes per annum of CBG.

Under SATAT, Oil Marketing Companies (OMCs) — IOCL, HPCL, BPCL — procure CBG from entrepreneurs at notified prices, providing assured offtake.
The National Biofuels Coordination Committee has mandated phase-wise CBG blending with CNG and PNG: 1% from FY 2025-26, 3% from FY 2026-27, and 4% from FY 2027-28.
Feedstocks include agricultural residue (paddy straw, sugarcane bagasse), cattle dung, municipal solid waste, and sewage treatment plant waste.
CBG production is eligible for the Pradhan Mantri JI-VAN Yojana, which provides financial assistance for advanced biofuel projects.
The National Policy on Biofuels 2018 underpins the entire ecosystem.

Connection to this news: CSIR-IICT's AGR technology directly enables small and medium enterprises (MSMEs) to set up viable CBG plants using proven domestically-developed technology, accelerating SATAT targets and reducing dependence on imported natural gas.

Circular Economy and Waste-to-Wealth

A circular economy is an economic model that minimises waste and maximises resource utilisation by keeping materials in use for as long as possible through reuse, recycling, and regeneration. In contrast to the linear "take-make-dispose" model, circular approaches create closed-loop systems where the output of one process becomes the input of another.

Anaerobic digestion converts organic waste into three valuable outputs: biogas (energy), digestate/bio-manure (fertiliser), and in some configurations, treated water (reusable for irrigation).
India generates approximately 62 million tonnes of municipal solid waste annually, of which about 50–60% is organic — a largely untapped feedstock for biomethanation.
Agricultural residue burning — particularly paddy straw in Punjab and Haryana — contributes significantly to seasonal air pollution. Channelling this residue to CBG plants directly reduces open burning.
NITI Aayog has identified circular economy as a priority framework under India's climate and waste management strategies.

Connection to this news: The CSIR-IICT model plant's ability to co-process sewage and solid organic waste into multiple value streams is a direct operational embodiment of circular economy principles, with replicable potential across Indian municipalities.

India's Biofuel Policy and Energy Security

India imports approximately 85% of its crude oil requirements, making energy security a persistent strategic concern. Biofuels — liquid and gaseous fuels derived from biological material — offer a pathway to reducing import dependence, cutting greenhouse gas emissions, and generating rural employment. India's integrated biofuel policy framework includes the National Policy on Biofuels 2018, the Ethanol Blending Programme (EBP), and the SATAT scheme for CBG.

India achieved 10% ethanol blending in petrol (E10) ahead of schedule in 2022 and set an E20 target by 2025.
CBG is positioned as a renewable substitute for natural gas in transport (as automotive fuel) and in city gas distribution (PNG network).
CSIR-IICT's collaboration with BPCL and GAIL-India is significant because it links technology development to the existing natural gas infrastructure network.
Bio-manure produced as a by-product can reduce farmers' dependence on synthetic urea, supporting the government's soil health goals.

Connection to this news: CSIR-IICT's role bridges the gap between laboratory innovation and market deployment — demonstrating how Indian public research institutions can anchor commercial-scale renewable energy transitions, a key example for GS Paper 3 answers on energy security and indigenous technology.

Key Facts & Data

AGR (Anaerobic Gas Lift Reactor) — CSIR-IICT's proprietary high-rate biomethanation technology for converting organic waste to biogas and bio-manure.
30+ installations — number of commercial AGR plants operating across India under CSIR-IICT licences.
SATAT scheme (October 2018) — government framework targeting 5,000 CBG plants producing 15 million metric tonnes/year.
52,000 KJ/kg — approximate calorific value of CBG, comparable to CNG.
Mandatory blending — 1% CBG in CNG/PNG from FY 2025-26, rising to 4% by FY 2027-28.
CSIR-IICT model plant — processes 100 L/day of sewage and 250 kg/day of organic solid waste simultaneously.
Collaboration partners — BPCL and GAIL-India (public sector oil and gas companies).
India generates ~62 million tonnes of municipal solid waste annually, with 50–60% organic fraction.
CSIR (Council of Scientific and Industrial Research) operates 37 national laboratories and is under the Department of Scientific and Industrial Research (DSIR), Ministry of Science and Technology.