Project overview
Turning cooperative dung into vehicle-grade fuel
The cooperative collected over 40 tonnes of cattle dung daily across member farms with no productive outlet. Sewaf Energy engineered a complete Bio-CNG chain that converts the collected slurry into compressed, cylinder-ready fuel while returning processed digestate to the same farms as organic fertilizer.
The plant runs on a continuous feed schedule with automated dosing, on-line methane monitoring and a two-arm filling bay sized for peak dispatch. Operators were trained over three weeks with written SOPs, safety drills and log formats before handover.
Project Features
Automated Feed
Consistent slurry dosing with variable-speed pumps.
Purification Train
H₂S scrubbing, drying and CO₂ separation to >95% CH₄.
250 bar Compression
Multi-stage compressor with inter-stage cooling.
Safety Systems
Gas detection, flame arrestors and emergency shutdown.
Technology Used
CSTR DigesterIron-oxide H₂S Scrubbing
Water Scrubbing / PSAMulti-stage Compression
Cascade StoragePLC & SCADA
Benefits Delivered
- Daily dung volume fully diverted from open disposal
- New revenue stream from Bio-CNG and bio-fertilizer sales
- Measurable methane capture supporting carbon reporting
- Member farms receive processed digestate at cost
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