Moisture Effects on Inactivation and Growth of Bacteria and Fungi in Sludges

摘要

Inactivation of bacteria and fungi by either heat or ionizing radiation is dependent on moisture content of the sludge system. In general, bacteria and fungal spores exhibit more resistance to inactivation when treated in the dry state. Moisture levels below 20 percent are not supportive of bacterial growth in composted sludge. High levels of coliforms effectively inhibit growth of salmonellas and of Aspergillus fumigatus in composted sludge systems.