Another look at thermophilic anaerobic digestion of wastewater sludge

New federal regulations on wastewater sludge management will be implemented in the near future and will have an impact on virtually every biosolids disposal method, including application to agricultural land. Current regulations on land application restrict land use according to the sludge treatment technology, whereas the new regulations will restrict land use based on pathogen destruction criteria. The most flexible land use practices will be allowed for biosolids with low pathogen content (Class A biosolids); for high-temperature sludge treatment processes (geater than 53°C), indicator organism destruction can be used as a measure of pathogen destruction