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Relevance: GS-III (Environment & Ecology, Renewable Energy, Agriculture) Source: Energy & Infrastructure Updates, August 2026

1 · Context

The government recently approved a massive ₹23,731 crore to revamp the GOBARdhan scheme until 2036. The goal is brilliant: turn rural agricultural waste (like cow dung and stubble) into Compressed Biogas (CBG) to run our cars and kitchens.
The money is ready, but the real headache is logistics. Collecting millions of tonnes of waste from scattered villages, storing it safely without it rotting or catching fire, and transporting it to gas plants is incredibly difficult. Understanding this “supply chain” challenge is vital. If we cannot easily collect the waste, even the best biogas plants will sit empty.

2 · The Raw Material Problem

Step 1: The ‘Parali’ Rush
Paddy and wheat stubble give great gas output. But farmers burn it quickly. Collecting it in just 15 days and storing dry bales all year poses huge fire risks.
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Step 2: Sugarcane Waste Spoils Fast
‘Press mud’ from sugar mills is excellent for biogas but rots quickly. Also, sugar mills only run for 4-5 months, making year-round gas production tricky.
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Step 3: Heavy Cow Dung
Cow dung gives less gas (only 6%) and is very heavy. Moving it across long distances burns so much diesel truck fuel that it ruins the “green energy” logic.
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Step 4: The ‘Aggregator’ Solution
To fix this, middlemen (aggregators) collect waste from a tight 25km radius. They also give the leftover organic manure back to the farmers as a reward.

3 · Key Energy Concepts

Compressed Biogas (CBG)
The Clean Fuel
When raw biogas is cleaned and compressed, it becomes pure methane. It works exactly like the CNG we use in our cars and buses today.
Bio-Slurry
The Golden Leftover
After waste is turned into gas, a nutrient-rich liquid is left behind. This ‘bio-slurry’ is given to farmers as a high-quality, free organic fertilizer.
SATAT Scheme
Guaranteed Buyers
A government initiative where big Oil Companies guarantee they will buy all the biogas produced by private plants, ensuring the business stays profitable.
Multi-Feedstock Plants
Flexible Factories
Experts say new plants must be designed to accept all kinds of waste. If stubble isn’t available, they should instantly switch to cow dung or sugar waste.

Prelims Quick Facts: Policies & Targets
Compulsory Blending The government has made it mandatory to mix CBG into city gas networks. The target starts at 3% in 2026-27 and peaks at 5% by 2028-29.
GOBARdhan Revamp The Union Cabinet recently secured the scheme until 2036 with a huge budget, creating a stable, long-term market for biogas makers.
Import Dependency India currently imports nearly 50% of its natural gas. Producing our own gas from local waste helps protect our economy from global price shocks.
The 25-km Golden Rule To keep transportation cheap and truly eco-friendly, raw materials for a biogas plant should ideally be collected from within a strict 25km radius.

MCQ Practice Question
Q. With reference to India’s push for Compressed Biogas (CBG) and related schemes, consider the following statements:

  1. The SATAT initiative aims to promote Compressed Biogas as an affordable and green alternative fuel for the transportation sector.
  2. The government has mandated a Compulsory Blending Obligation (CBO) of 15% for CBG into city gas networks starting from the financial year 2026-27.
  3. ‘Press mud’, a significant raw material used for CBG production, is generated as a byproduct during the processing of sugarcane.

Which of the statements given above is/are correct?
(a) 1 and 2 only    (b) 2 and 3 only    (c) 1 and 3 only    (d) 1, 2 and 3

Answer: (c) 1 and 3 only

  • Statement 1 — Correct: The SATAT (Sustainable Alternative Towards Affordable Transportation) scheme guarantees that oil companies will buy CBG to promote it as vehicle fuel.
  • Statement 2 — Incorrect (the trap): The Compulsory Blending Obligation (CBO) target starts at 3% in 2026-27 and goes up to 5% by 2028-29, not 15%.
  • Statement 3 — Correct: Press mud is a highly useful organic byproduct from sugar mills, making it an excellent raw material for biogas plants.
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