Product

Off-spec gas cannot be sold to an OMC or CGD, can void the offtake agreement, and undermines any carbon or green-fuel claim attached to it - so a single quality parameter sits upstream of CBG revenue, FOM credibility and carbon eligibility together. Under the IOCL agreement, quality faults trace back to whichever party's equipment caused them.

Slip erodes both saleable volume and carbon value, so financiers increasingly require guaranteed methane recovery and guaranteed specific power consumption, each with a defined test protocol and a penalty. Treat a 99% recovery claim as a clause to be tested, not a brochure number.

Adding hydrogen to the biogenic CO2 stream can convert it to additional methane, a power-to-gas route that raises output from the same feedstock. It needs cheap renewable hydrogen and is early-stage, so it is a future option rather than a mainstream Indian CBG pathway today.

Recovered CO2 sells at industrial or food and beverage grade after purification and liquefaction, with food grade commanding a premium and demanding tighter purification. Realising the revenue needs liquefaction capital and a buyer within economic reach, so it is scenario-dependent rather than automatic.

Market Development Assistance of 1,500 rupees per tonne for FOM, LFOM and PROM can make manure a standalone cash flow rather than a footnote, provided marketing and logistics are solved - 111.72 crore rupees had been released as MDA up to 28 February 2026. Industry sources treat a plant that cannot monetise digestate as financially fragile.

A spec-compliant FOM earns nothing if farmers will not buy it, and acceptance rests on demonstrated agronomic benefit, consistent quality and a distribution channel. The MDA subsidy addresses price; it does not address the harder marketing and behaviour-change problem.

FOM, LFOM and PROM sell to farmers, cooperatives and fertiliser marketers with MDA support behind the price; biogenic CO2 sells to industrial or food-grade buyers where liquefaction capital and a nearby buyer both exist. Both are real channels and both are under-developed, so neither should be modelled as automatic.

Pyrolysing digestate solids to biochar is a separate, later-phase pathway producing a durable soil-carbon product and a distinct carbon-removal credit. It must never be combined with the plant's methane-avoidance accounting: removal and avoidance are different asset classes, priced roughly 10-20 times apart, and summing them misstates the climate claim.