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Biological scrubbers, also known as bio‐scrubbers, are air pollu􀆟on control systems that use microorganisms to remove pollutants from gas streams. The gas is passed through a liquid medium where microorganisms break down harmful substances, such as volatile organic compounds (VOCs) and hydrogen sulfide (H₂S), into harmless

byproducts like water and carbon dioxide.

Key Features:

• Biological Process: Microorganisms naturally degrade pollutants, making the scrubber eco‐friendly and sustainable.

• Water‐Based System: Polluted gas flows through a liquid medium (usually water), which supports the growth of microorganisms that break down contaminants.

• Low Operating Cost: Biological scrubbers are energy‐efficient and often have lower operating costs than chemical scrubbers because they rely on natural processes.

• Applications: Commonly used in industries like wastewater treatment, food processing, and composting to control odors and remove organic pollutants from exhaust gases.

Biological scrubbers offer an environmentally friendly solution for treating gas emissions, using biological processes to efficiently break down pollutants.