H₂S Scrubbers for Palm Oil Mill Biogas
H₂S scrubbers that clean palm oil mill effluent biogas for engines, boilers and biomethane.
.svg)
Clean biogas from palm oil mill effluent
CRA's H₂S scrubbers clean POME biogas for engines, boilers and biomethane, with bulk removal below 100 ppm and carbon polishing below 5 ppm.
Outlet H₂S after bulk removal
Below 100 ppm
Outlet H₂S with polishing
Below 5 ppm
Caustic saving
Up to 90% with regeneration
Supply
Skid-mounted
How is H₂S removed from palm oil mill biogas?
In a biological scrubber, bacteria on a packed bed oxidise the hydrogen sulphide as the gas passes through. In the chemical scrubber with biological regeneration, an alkaline solution absorbs the H₂S and bacteria regenerate the solution, so the gas picks up no air. Where a tight outlet is needed, an activated carbon vessel polishes the gas afterwards.
How it works
The scrubber sits between the gas collection system and the engines, boilers or upgrading plant.
Biogas from the covered lagoon or digester flows to the scrubber.
The biological scrubber, or the chemical scrubber with biological regeneration, removes most of the hydrogen sulphide.
In the chemical scrubber, bacteria regenerate the solution for reuse.
Activated carbon brings H₂S down further where the end use needs it.
Clean gas goes to the engines, boilers or upgrading plant.
Key Benefits
The scrubber cuts H₂S to below 100 ppm for engines and boilers.
Activated carbon polishing brings H₂S below 5 ppm for upgrading.
Biological regeneration cuts caustic use by up to 90%.
CRA selects the scrubber for engines, boilers or biomethane.
Scrubbers are built as skids for installation at operating mills.
Projects That Push Boundaries
Chemical scrubber with biological regeneration and activated-media polishing designed to reduce H2S from 10,000 ppm to below 200 ppm.
Removes H2S and acidic contaminants for safe, reliable biogas use in municipal infrastructure.
The CRA Edge
CRA has more than 30 years of experience in gas handling and flare engineering.
Design, R&D and manufacturing are carried out under one roof.
ISO 9001 certified through TÜV NORD, with designs aligned with ASME, API and CE.
Designs are customised to the process needs and the regulations that apply at site.
Applications
Built to help you specify.
Sizing tools, decision guides, and technical references. Use them before, during, and after your evaluation.
Frequently Asked Questions
Why does POME biogas need an H₂S scrubber?
POME biogas carries enough hydrogen sulphide to corrode engines, boilers and pipework and to breach emission limits, so it has to be scrubbed before use.
Which scrubber suits a palm oil mill?
Biological scrubbers suit engine and boiler duty. For upgrading to biomethane, CRA uses the chemical scrubber with biological regeneration, followed by carbon polishing.
What outlet H₂S can the scrubber reach?
Bulk removal brings H₂S below 100 ppm, and activated carbon polishing brings it below 5 ppm.
What data does CRA need to size a POME biogas scrubber?
CRA needs the biogas flow range, the inlet H₂S range, the end use of the gas and the site conditions.
Can the scrubber be added to an existing biogas plant?
Yes. CRA's scrubbers are skid-mounted and tie into the existing gas line.