A step-by-step look at how we convert organic waste into high-purity Bio-CNG through anaerobic digestion and multi-stage purification.
Watch organic waste travel from collection through anaerobic digestion, purification, and into high-pressure Bio-CNG cylinders ready for use.
Each stage of our process is precisely engineered to maximise gas yield, minimise waste, and meet IS-grade Bio-CNG standards every time.
Organic waste — from municipal solid waste to agri-residue and food processing byproducts — is collected and transported to our plant. Before entering the digester it undergoes shredding, size reduction and contaminant removal (plastics, metals). Moisture content and nutrient ratios are balanced to create an ideal slurry, maximising microbial activity in the next stage and preventing clogging or system downtime.
The heart of Bio-CNG production. Inside sealed digesters, specialised microbial communities break down organic matter in the complete absence of oxygen over 20–30 days. The process produces raw biogas (~60–70% CH₄, 30–40% CO₂) and nutrient-rich digestate that can be sold as organic fertiliser. Temperature (35–55°C), pH (6.8–7.5) and mixing are continuously monitored for peak microbial performance.
Raw biogas contains impurities — CO₂, H₂S, moisture and siloxanes — that reduce energy content and corrode equipment. Our multi-stage purification system uses desulphurisation scrubbers, water-wash columns and membrane separation to achieve 97%+ methane purity. The result is biomethane that meets IS 16087 fuel-grade standards, ready for compression and distribution.
Purified biomethane is compressed using multi-stage cascade compressors to 200–250 bar and stored in high-tensile CNG cylinders. Pressure relief valves, automated shutdown systems and continuous monitoring ensure safe, reliable storage. The final Bio-CNG is physically and chemically identical to fossil CNG — making it a true drop-in fuel for any CNG vehicle or industrial burner without modification.