Feedstock sourcing identified as the next critical lever for scaling India's CBG ecosystem
2-minute summary
The scaling of India's Compressed Bio-Gas (CBG) ecosystem hinges on establishing an efficient supply chain for organic feedstock sourcing, storage, and management. While the Union Cabinet's revamped GOBARdhan scheme (approved in August 2026 with a ₹23,731 crore outlay until 2036) aims to increase CBG production tenfold, logistical challenges persist. Primary feedstocks like press mud, paddy/wheat straw, and animal manure face seasonal availability, high moisture content, and storage risks (fire and moisture degradation). For instance, press mud and cattle dung require localized sourcing within a 25-km radius due to their perishable nature, while paddy straw collection is constrained by a tight 15-day harvest window. To overcome these barriers, experts advocate for an aggregator-based model to bridge the gap between farmers and plants, returning organic bio-slurry to farmers as fertilizer. Furthermore, designing multi-feedstock plants will enhance resilience against seasonal supply fluctuations.
Why it's in the news
The Union Cabinet approved a revamped GOBARdhan scheme with an outlay of ₹23,731 crore to scale CBG production tenfold by 2036. This has shifted the policy and industry focus toward resolving critical feedstock supply chain and sourcing bottlenecks.
Background and context
Compressed Bio-Gas (CBG) is purified biogas produced through the anaerobic decomposition of organic waste. To promote CBG, the Government of India launched the SATAT (Sustainable Alternative Towards Affordable Transportation) initiative in 2018. This was complemented by the GOBARdhan (Galvanising Organic Bio-Agro Resources Dhan) scheme under the Swachh Bharat Mission (Grameen) to convert cattle dung and solid agricultural waste into compost and biogas. Despite policy push, CBG plants have struggled with capacity utilization due to fragmented feedstock supply chains, seasonal crop cycles, and high logistics costs. The August 2026 revamp of the GOBARdhan scheme with long-term funding (till 2036) seeks to address these structural bottlenecks systematically.
Constitutional provisions
- Article 48A — Directs the State to protect and improve the environment and safeguard forests and wildlife, aligning with clean energy transitions.
- Article 51A(g) — Imposes a fundamental duty on citizens to protect and improve the natural environment, supported by community-led waste-to-energy initiatives.
Committees and reports
- Parliamentary Standing Committee on Petroleum and Natural Gas (Report on Review of SATAT Scheme) — Highlighted the slow progress of CBG plants due to feedstock procurement issues and recommended financial incentives for entrepreneurs.
Government schemes
- GOBARdhan (Galvanising Organic Bio-Agro Resources Dhan) Scheme — Revamped in August 2026 with a ₹23,731 crore outlay until 2036 to scale up CBG production tenfold.
- SATAT (Sustainable Alternative Towards Affordable Transportation) — Aims to establish CBG production plants and make them available in the market for automotive use.
International organisations
- Global Biofuels Alliance (GBA) — Launched during India's G20 Presidency to facilitate secure biofuel supply chains and promote technology transfer globally.
Previous UPSC questions on this theme
- Prelims GS-1 2020 — According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ? 1. Cassava 2. Damaged wheat grains 3. Groundnut seeds 4. Horse gram 5. Rotten potatoes 6. Sugar beet Select the correct answer using the code given below : (a) 1, 2, 5 and 6 only (b) 1, 3, 4 and 6 only (c) 2, 3, 4 and 5 only (d) 1, 2, 3, 4, 5 and 6
Mains practice: Analyze the supply chain bottlenecks in India's Compressed Bio-Gas (CBG) sector and suggest measures to establish a sustainable feedstock ecosystem.
Compressed Bio-Gas (CBG) is a cornerstone of India's green energy transition, offering a circular economy solution by converting organic waste into clean fuel. However, scaling the CBG ecosystem to meet the revamped GOBARdhan scheme's targets requires resolving critical feedstock supply chain bottlenecks.
**Key Supply Chain Bottlenecks:**
• **Seasonal Availability:** Agricultural residues like paddy straw are only available during short harvesting windows (typically 15 days), requiring rapid collection and long-term storage.
• **High Moisture and Perishability:** Feedstocks like press mud (sugarcane residue) and cattle dung have high moisture content, making long-distance transport economically unviable. Sourcing is practically restricted to a 25-km radius.
• **Storage Hazards:** Storing massive volumes of agricultural residue exposes plants to fire hazards during summer and moisture degradation during monsoons.
• **Fragmented Sourcing:** Engaging directly with thousands of smallholder farmers for feedstock procurement poses immense legal and logistical hurdles.
**Suggested Measures to Build a Sustainable Ecosystem:**
• **Aggregator-Based Model:** Implementing an aggregator model can bridge the gap between farmers and CBG plants. Aggregators facilitate outreach, handle logistics, and bypass complex legal contracts that farmers avoid.
• **Multi-Feedstock Plant Design:** CBG plants should be engineered to process diverse feedstocks (e.g., mixing dung, press mud, and straw) rather than relying on a single source, mitigating seasonal supply shocks.
• **Circular Bio-Slurry Loop:** Returning nutrient-rich bio-slurry (a byproduct of CBG production) to farmers as organic fertilizer incentivizes feedstock supply and improves soil health.
• **Decentralized Storage Infrastructure:** Creating fire-safe, moisture-proof storage hubs near production clusters to preserve feedstock quality.
**Conclusion:**
Addressing feedstock logistics is vital for the viability of India's CBG sector. By strengthening aggregator networks and promoting multi-feedstock technology, India can successfully scale its bio-gas capacity, reduce crude imports, and achieve its Net-Zero goals.
Prelims practice questions
Q1. With reference to the revamped GOBARdhan scheme approved in August 2026, consider the following statements: 1. The scheme has been approved with an outlay of over ₹23,000 crore. 2. The financial allocation and scheme framework are set to remain in place until 2036. 3. It aims to increase Compressed Bio-Gas (CBG) production nearly tenfold. Which of the statements given above are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: D. According to the article, the Union Cabinet approved the revamped GOBARdhan scheme with an outlay of ₹23,731 crore (which is over ₹23,000 crore), to remain in place until 2036, aiming to increase CBG production nearly tenfold. Thus, all three statements are correct.
Q2. Regarding the technical and logistical aspects of Compressed Bio-Gas (CBG) production, which of the following statements is/are correct? 1. The gas yield from cow dung is typically higher than that from paddy straw. 2. Press mud and cattle dung are highly perishable and ideally require sourcing within a 25-km radius of the plant. Select the correct answer using the code given below:
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Answer: B. Statement 1 is incorrect because the gas yield from cow dung is approximately 6%, whereas paddy straw and agricultural residues yield around 10% or more. Statement 2 is correct as press mud and cattle dung have high moisture content and are perishable, making a 25-km sourcing radius the viable option.
Q3. Which of the following is a solid residue left after sugarcane processing, widely used as a feedstock for Compressed Bio-Gas (CBG) plants?
- Press mud
- Molasses
- Coal tar
- Bagasse
Answer: A. Press mud is explicitly defined in the article as the solid residue left after sugarcane processing, which is highly utilized as a feedstock for CBG production.
Revision flashcards
- What is the outlay and timeline of the revamped GOBARdhan scheme approved in August 2026? Outlay of ₹23,731 crore, remaining in place until 2036.
- What are the approximate gas yields of cow dung versus paddy straw in CBG production? Cow dung yields approximately 6% gas, while paddy straw yields around 10% or more.
- Why must press mud and cattle dung be sourced close to CBG plants (within ~25 km)? Due to their high moisture content, perishability, and the high cost of long-distance transportation.
- What is 'press mud'? The solid residue left behind after sugarcane processing in sugar mills.
- How does the aggregator-based model benefit both CBG plants and farmers? Aggregators secure feedstock supply for plants without requiring complex legal contracts from farmers, and can distribute nutrient-rich bio-slurry back to farmers as organic fertilizer.