Biogas Upgradation
Membrane CO2 Removal Technology
How we remove CO₂ from raw biogas to reach fuel-grade methane purity for Compressed Biogas (CBG).
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- Dry Digestion and CSTR Technology
- CO2 Removal Technology
Removing CO2 From Biogas
Raw biogas typically contains methane along with CO₂, H₂S, moisture and other impurities. After effective H₂S removal and gas conditioning (see our H2S Scrubbing Technology), CO₂ is separated to increase methane concentration and produce high-quality biomethane/CBG. Bharat Bioenergy & Renewable provides membrane-based CO₂ separation systems designed for efficient, reliable and modular biogas upgrading.
95 mol%
Min. Methane (CH₄)≤4 mol%
CO₂≤5 mol%
CO₂ + N₂ + O₂≤0.5 mol%
O₂As per the latest IS 16087:2025 biomethane standard.
Membrane Separation
Compressed biogas is passed across selective polymer membranes. CO₂ and moisture permeate through the membrane faster than methane due to differences in molecular size and solubility, leaving a methane-enriched retentate. We offer this as a 2-stage or a 3-stage configuration, with the 3-stage design recycling permeate methane back through the process for higher purity and recovery.
| Parameter | 2-Stage Configuration | 3-Stage Configuration |
|---|---|---|
| Methane Purity | 96% v/v | 99% v/v |
| Methane Slip | 3% | 0.5% |
As the number of membrane stages increases, permeate recycling improves recovery and the membrane area required per unit of throughput typically reduces.
14
Purified Gas Pressure (Bar)10
Element Life (Years)0.23
Electricity Consumption (Kwh/M³)99%
Max. Methane Purity (CH₄)*Under specified operating conditions. Membrane elements are designed for an expected service life of up to 10 years, subject to adherence to specified feed-gas quality, operating parameters and recommended maintenance protocols.
Why BBRPL Membrane Technology?
High Methane Purity
Up to 99% CH₄ with a multi-stage membrane configuration.
High Methane Recovery
Multi-stage configuration with permeate recycling can improve methane recovery and reduce methane losses.
Dry Process
No chemical solvent circulation is required for the CO₂ separation step.
Low Utility Requirement
Compact system with electrical energy consumption of approximately 0.23 kWh/Nm³ under specified operating conditions.
Compact & Modular
Membrane modules can be configured according to plant capacity, making the system suitable for different CBG project sizes.
No Steam Requirement
The membrane CO₂ separation process does not require steam for the separation step.
Long Service Life
Membrane elements are designed for an expected service life of up to 10 years, subject to adherence to specified feed-gas quality, operating parameters and recommended maintenance protocols.
Gas conditioning and H₂S scrubbing are provided as a separate upstream step ahead of the membrane system — see our H2S Scrubbing Technology — and are not part of the membrane technology's own scope. CO₂ removal alone does not make gas fuel-grade; fuel-grade CBG requires both effective upstream H₂S removal and CO₂ separation together.
Trusted by Leading Sugar & Bio-Energy Producers
Bharat Bioenergy & Renewable membrane CO₂ removal and CBG solutions are trusted by leading sugar and bio-energy producers, including:
Representative client list.
