Bihar at a glance
- Main CBG feedstock: Paddy straw, maize stover, cattle dung
- Typical plant size: 3–10 TPD
- Central support: GOBARdhan capital assistance up to ₹2 crore per TPD for eligible greenfield plants
- Biovardhan scope: feedstock study, DPR, approvals coordination, turnkey EPC, commissioning & O&M
Why Bihar is ready for CBG
- Abundant paddy straw, including in the Rohtas–Kaimur rice belt
- Maize stover and cobs from the Kosi and Seemanchal maize belt
- A large cattle population for dung-based co-digestion
- Few CBG plants so far, so an early-mover advantage on feedstock zones
Main CBG feedstocks in Bihar
| Feedstock | What to plan for |
|---|---|
| Paddy straw | Widely available. Needs baling and storage. |
| Maize stover & cobs | A major residue in the maize belt. Fibrous, so it needs shredding and shearing. |
| Cattle dung | Plentiful. A stable base for co-digestion. |
| Press mud | From sugar mills in the Champaran and Gopalganj belt during the crushing season. |
How much feedstock do you need? Use the feedstock-to-CBG calculator, or see sizing for a 5 TPD and a 10 TPD plant.
Recommended plant design for Bihar
A mixed-feed plant suits Bihar: a cattle-dung base for stability, with paddy straw and maize stover added through a shredding and shearing line. Two harvest seasons (kharif paddy and rabi or kharif maize) help spread straw availability through the year.
- Feedstock aggregation
- Pretreatment
- CSTR digestion
- Upgrading (IS 16087:2025)
- Compression
- CBG
- FOM / LFOM
Central & state support for CBG in Bihar
Under the GOBARdhan National Unified Scheme (₹23,731 crore, FY 2026-27 to FY 2035-36), eligible greenfield CBG projects in Bihar can receive capital assistance of up to ₹2 crore per TPD, along with assured offtake, a pricing framework and support for pipeline connectivity. The CBG blending obligation for CNG and PNG creates steady demand. State-level industrial, renewable-energy or bioenergy policies may offer further incentives. These change with notifications, so we check the current provisions for Bihar while preparing your DPR.
Districts we serve in Bihar
Rohtas, Kaimur, Bhojpur, Buxar, West Champaran, East Champaran, Gopalganj, Siwan, Muzaffarpur, Samastipur, Begusarai, Purnia, Katihar, Bhagalpur, and every other district of Bihar. Biovardhan is based in Kota, Rajasthan, and executes projects across India, with site visits for feedstock study, design reviews and construction supervision.
Our CBG services in Bihar
- Feedstock survey & lab analysis
- Site selection & land/CLU support
- DPR & bank documentation
- GOBARdhan registration & offtake coordination
- Pollution control, PESO & fire approvals coordination
- Turnkey EPC, 3 TPD to 20+ TPD
- Biomass pretreatment & twin-screw shearing
- FOM / LFOM plants, commissioning & O&M
Looking at another region? See CBG plants by state.
Frequently asked questions
Yes. Bihar has abundant paddy straw, maize residue and cattle dung, and relatively few CBG plants, so good feedstock zones are still available.
Yes. Maize stover and cobs have good gas potential after proper size reduction and shearing, and work well co-digested with cattle dung.
Most projects start at 3–10 TPD, sized to the feedstock available within an economic radius. Plants can grow as aggregation networks mature.