Cleaner Biogas. Better Performance. Longer Equipment Life.
Raw biogas contains water vapour, hydrogen sulphide and other impurities that can reduce combustion quality, create odour, corrode pipelines and damage appliances or engines. A properly designed purification system removes or reduces these contaminants before the gas reaches the point of use.
Dominion Biogas Services designs purification packages according to gas flow rate, contaminant concentration, intended application, required gas quality and operating conditions.
Protect Your Biogas Investment
Cleaner gas supports a more stable and efficient flame.
Lower H₂S and moisture protect metal components.
Helps extend the service life of cookers, generators and burners.
Reduces pipeline blockage and condensate accumulation.
H₂S treatment improves gas handling and user experience.
Treated gas is better suited for engines and boilers.
Contaminants Commonly Addressed
| Contaminant | Why It Matters | Typical Treatment |
|---|---|---|
| Water Vapour | Causes corrosion and pipeline obstruction. | Moisture separation and condensate traps. |
| Hydrogen Sulphide | Toxic, odorous and corrosive. | Iron media, activated carbon or suitable sorbents. |
| Carbon Dioxide | Lowers calorific value. | Optional CO₂-removal technologies. |
| Particulates | May block small orifices. | Mechanical and polishing filters. |
Multi-Stage Biogas Purification
1. Raw Gas Inlet
Biogas enters from the digester.
2. Moisture Separation
Condensate is removed.
3. H₂S Removal
Gas passes through desulphurisation media.
4. Polishing
Residual contaminants are reduced.
5. Clean Gas Outlet
Treated gas goes to storage or use.
Suitable for Multiple Biogas Uses
From Basic Treatment to Advanced Upgrading
Basic Protection Package
Condensate trap, H₂S filter, valves and pressure check point.
Commercial Purification Package
Multi-stage drying, twin H₂S vessels, regulation, gauges and bypass.
Advanced Gas-Upgrading Package
Enhanced drying, polishing, optional CO₂ reduction and monitoring.
What the Package Can Include
Designed According to Gas Quality and Flow
| Gas Flow Capacity | Custom-sized from household to institutional systems |
| Primary Treatment | Moisture and H₂S reduction |
| Operating Pressure | Low-pressure biogas service unless otherwise engineered |
| Instrumentation | Pressure gauges, sampling points and optional sensors |
| Final Specification | Issued after gas-flow and contaminant assessment |
Purification Engineered for the Actual Application
Correct design depends on gas flow, H₂S concentration, moisture load, pressure and the equipment that will use the gas.
✓ Custom Engineering
✓ Serviceable Design
✓ Integrated Delivery
✓ Testing and Training
✓ Long-Term Support
Important Safety Notice
Biogas may contain flammable methane and toxic hydrogen sulphide. Purification equipment must be installed in a ventilated location, protected from ignition sources and tested for leaks.
Questions Clients Frequently Ask
Does every biogas system need purification?
Most systems benefit from moisture control and some H₂S reduction.
Can it be added to an existing biodigester?
Yes, after gas flow, pressure and pipeline condition are assessed.
How often is filter media replaced?
Frequency depends on gas flow, contaminant concentration and media capacity.
Why is there no fixed price?
Price depends on flow rate, treatment stages, vessel size, instrumentation and installation conditions.
Protect Your Equipment with a Professionally Engineered Purification System
Assessment, design, installation, testing and long-term technical support for residential, commercial, agricultural and institutional projects.










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