Compressed BioGas (CBG)

Grass to Gas: India’s First Utility‑Scale Napier CBG plant

At 200 TPD feed capacity, our digester hub transforms ensiled napier into ≥97 % CH₄ compressed biogas. The gas is bottled at 200 bar for fleets or injected into the CGD grid—delivering drop‑in replacement for CNG and LPG. This renewable biofuel wipes out particulate emissions, lowers CO₂ by 90 % and keeps forex at home.

Process Flow

  • Hydrolytic pre‑digester cracks cellulose.
  • CSTR digesters run at 38 °C with automated pH control.
  • Two‑stage membrane upgrader meets CGD specs—putting us among the most advanced biogas plant in India projects.
  • Liquid digestate is filtered into LFOM; solids pass to PROM.

Multi‑Revenue Stack

  • Bio‑CNG – 30 t/day sold at SATAT floor price ₹46 / kg.
  • Beverage‑grade CO₂ – 28 t/day.
  • Carbon credits – 0.8 CER per GJ.
  • Waste heat – powers own 1 MW ORC turbine—closing the green energy loop.

Deployment Timeline

  • Civil & tanks 45 % (Q4 2025) → Mechanical erection Q1 2026 → Gas trials Q2 2026 → Commercial dispatch Q3 2026.

FAQ’s

CBG is lighter than air, disperses quickly and cylinders meet PESO norms.

A 600 kg cascade stores ~300 Nm³.

SATAT guarantees buy‑back, plus capital subsidy and accelerated depreciation.

We capture and sell into beverages and dry‑ice markets.

Yes—up to 25 % mixed agri‑waste without process upset.