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Are there pathogens in biosolids?

April 26, 2017biosolids pathogens

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Are there pathogens in biosolids?

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Yes. Class B biosolids may have low levels of pathogens that rapidly die-off when applied to soils. Class A biosolids have no detectable pathogens. EBMUD currently produces Class B biosolids using an anaerobic digestion process, during which the sludge is subjected to high temperatures (95 F to 120 F) for at least 15 days. This extensive treatment kills the majority of pathogens present and makes the biosolids meet the Class B standard. EBMUD is currently investigating ways to produce Class A biosolids.