Scrubbers

Gas-cleaning systems that strip H₂S and other contaminants from biogas, natural gas, and process streams. CRA supplies dry iron-oxide scrubbers for polishing duty and biological scrubbers for high-load bulk removal, each matched to inlet loading and the outlet specification you need to hit.

Biogas Chemical H2S Scrubber

Proven Chemical Scrubbing for Clean, Compliant Biogas Processing

Biological H2S Scrubber

Power of Microbes: Clean Biogas with Biological Scrubbers

Activated Carbon Dry H2S Scrubber

Reliable and Clean Scrubbing for Biogas with Activated Carbon Scrubbers

Bio-Regenerative Chemical H2S Scrubber

Bio-Regenerative Chemical Scrubbers for High-Load H₂S Removal

Dry Iron Scrubber

Iron Oxide Media, Engineered for High H2S Duty

Projects That Push Boundaries

See how we turn hard problems into high-performance infrastructure.

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Enclosed Ground Flare for Lean Methane Flue Gas from Upstream Operations

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Open Elevated Biogas Flare System with >98% Combustion Efficiency

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ISO 16852 Bi-Directional Flame Arrestors for Low-Pressure Biogas Networks

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Our Blogs

Get all the technical details and resources you need in one place.

Flare Gas Recovery and Its Role in Making Flaring More Sustainable

A Thermal Oxidizer for Emissions, an Enclosed Ground Flare for Safety, Engineered as One System

Biogas upgrading for CBG and RNG: why one gas-train partner beats a multi-vendor plant

Enclosed vs Open Flares: Which System Fits Your Application?

Which H₂S Scrubber Is Best for Your Application?

Thermal Oxidizer vs Enclosed Flare: Choosing the Right Solution for VOC and Waste-Gas Control

Choosing Between DFTO, Recuperative, and Regenerative Thermal Oxidizers: What You Should Know

Engineering Without Shortcuts