Stabilized sludge has little odor and conforms to the EPA requirements to further reduce harmful microorganisms. Methane gas is produced by this anaerobic digestion and is used as fuel for an engine-generator providing 240 kW of electrical power used in the treatment process. Waste heat from the engine is recovered for heating the treatment plant buildings and to provide heating to improve the sludge digestion process and produce more gas. The biosolids are utilized in an environmentally acceptable manner as a beneficial and valuable fertilizer and soil conditioner. The biosolids applied to all sites are monitored for nutrients, metals, other compounds and fecal coliform bacteria.
Soil testing is performed at all sites prior to biosolids application.
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