Biofiltration removes biodegradable compounds from drinking water through biodegradation, adsorbing micropollutants, and filtering suspended solids. Microbial growth attaches to the filter and consumes organic matter that would otherwise flow through the treatment plant into the distribution system. Its use has been limited in North America, likely due to the public’s perception of intentionally introducing microorganisms into water treatment processes. New regulatory and technological developments are driving more interest in biofiltration.

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