The Law Now Forces India's Gas Companies to Buy Biogas. The Plants to Make It Barely Exist. If You Collect Crop Waste or Dung, You Are the Missing Piece.

If you bale paddy straw, run a gaushala or a dairy, operate a sugar mill with press mud, or move the wet waste out of a mandi or a municipality, this is the most important shift in your market in years. A new, government-mandated buyer has appeared for material that you often struggle to sell or simply burn, and that buyer is short of exactly what you have.

Here is why the balance of power is moving to your side of the gate.

The numbers at a glance

(Blending obligation figures are from the Ministry of Petroleum and Natural Gas. Plant counts are government data as reported in August 2026. "CBG" is compressed biogas, a renewable fuel made from crop and organic waste that can replace natural gas.)

The demand is now a legal duty, not a hope

For years, biogas in India ran on goodwill and subsidy. That changed.

The Ministry of Petroleum and Natural Gas has made CBG blending compulsory. Through 2024-25 it was voluntary. From 2025-26 it is a legal obligation: city-gas distributors must blend CBG into the CNG they sell for vehicles and the piped gas they supply to homes, at 1% of their total CNG and PNG in 2025-26, rising to 3% in 2026-27, 4% in 2027-28, and 5% from 2028-29. A Central Repository Body tracks who complies.

That schedule matters to you more than to anyone. The jump from 1% in 2025-26 to 3% in 2026-27 roughly triples the CBG that gas companies are legally required to buy, in a single step. In the first year the industry just scraped past the 1% mark. To hit 3% it needs far more gas, which means far more plants, which means far more feedstock. The buyer is now compelled by law to come looking for supply.

The plants barely exist, and everyone knows why

Now the gap. SATAT, the scheme that underpins CBG, set a target of 5,000 plants making 15 million tonnes of CBG a year. As of 6 August 2026, 1,908 plants were registered, but only about 217, roughly one in nine, had actually been commissioned, together producing about 0.4 million standard cubic metres a day. The programme needs to grow its output around tenfold to meet its goal.

Crucially, the government's own assessment of why it has fallen short does not blame the buyers or the technology. It points to feedstock aggregation, state-level rules and on-ground execution. In plain terms: plants cannot get a steady, reliable supply of the biomass they need to run. Operators have signed up and even built, then struggled because the material did not arrive in the quantity and condition required, day after day.

This is the single most important sentence for you to absorb: the bottleneck in India's biogas push is not demand and not money. It is supply, and supply is your business.

The money has understood this. On 23 October 2026, Petronet LNG, the country's largest importer of natural gas, formed a 50:50 joint venture with Gruner Renewable Energy to build ten CBG plants for about ₹1,200 crore, each designed for 18 tonnes a day, around 180 tonnes a day in total. It is Petronet's first move into renewable gas, and it is not alone: the government's GOBARdhan programme is pushing cattle dung and farm waste into fuel, and state oil companies are chasing more CBG offtake. Every new plant that opens is another buyer at your door.

What a CBG plant actually wants to buy from you

A CBG plant is not fussy about brand or polish. It is fussy about a steady flow of the right organic material. Depending on the plant, that is:

• Crop residue: paddy straw above all, but also other agricultural waste. This is the material that is otherwise burned in fields across the north every winter.
• Cattle dung: the backbone of the GOBARdhan route, from dairies, gaushalas and villages.
• Press mud: the filter cake left over at sugar mills, a dense, reliable feedstock.
• Napier and other energy grasses, where grown for the purpose.
• Wet organic waste: the food and market waste from mandis, municipalities, hotels and canteens.

A plant producing 18 tonnes of gas a day needs a large, steady daily intake of this feedstock, many times the weight of the gas it makes, arriving reliably through the year, not just at harvest. That steadiness is the hard part, and it is exactly where a serious aggregator earns a premium over a casual seller.

How to become a plant's supplier, not a one-off seller

The opportunity is real, but it rewards organisation, not opportunism. A CBG plant signing a feedstock contract wants certainty for years, because it has borrowed money against that gas. That is your leverage, if you can offer what it needs.

If you bale crop residue: a plant needs supply across the year, so storage and baling capacity to hold straw from the harvest and feed it out month by month is what turns you from a seasonal seller into a contracted supplier. The field fires every winter are, from a plant's point of view, its feedstock going up in smoke.

If you run a dairy, gaushala or collect dung: the GOBARdhan route is built for you. Aggregating dung from many small holders into a dependable daily volume for a nearby plant is the service the plant cannot easily do itself.

If you are a sugar mill with press mud: you are sitting on prime feedstock. A long-term supply tie-up with a CBG plant turns a disposal cost into a revenue line.

If you move municipal or mandi wet waste: segregated, reliable organic waste is in demand, and a contract with a CBG plant is a steadier home for it than the dump.

In every case, the move that pays is the same: offer a plant a written, year-round supply agreement with volumes it can bank on, GST-billed and documented, rather than selling a truckload when it suits you. The plants being built through 2026 are choosing their feedstock partners as they raise the money and break ground.

What to watch

1. FY 2026-27 blending: Whether gas companies can reach the 3% obligation, which decides how hungry they are for CBG and feedstock.
2. New plant announcements near you: The Petronet-Gruner plants and others will be sited where feedstock is, so watch for a plant coming up within trucking distance.
3. GOBARdhan and state feedstock policies: State rules on crop residue and dung are the official bottleneck the government is trying to clear, and they change what you can supply and at what price.
4. 1 April 2027: The 4% obligation year begins, another step up in demand.
5. Feedstock prices: As plants compete for supply, watch whether contracted feedstock rates rise, the clearest sign your leverage is real.

The bottom line

India has done the hard political thing first: it has made the buying of biogas compulsory, rising to 5% of city gas by 2028-29. What it has not done is build the plants or, above all, organise the feedstock to feed them, and the government knows feedstock aggregation is the weak link. That is the rare situation where the person with the raw material holds the advantage. If you collect crop residue, dung, press mud or wet waste, the smart move is not to sell a load when you happen to have one. It is to become the supplier a new plant cannot run without.