title: Survival of Salmonella spp. in a simulated acid-phase anaerobic digester treating sewage sludge.
abstract: The presence of pathogenic microorganisms in municipal waste sludge may create a serious outbreak of water borne diseases if the sludge is used for agricultural purpose. An attempt to decrease the number of pathogenic microorganisms, Salmonella spp. using a simulated acid-phase anaerobic digester was tested in a laboratory-scale batch experiment. Reduction of Salmonella spp. was demonstrated in a mixture of sludge and organic acid, simulating an acid digester of a two-phase anaerobic digestion process. A high concentration of organic acid at a pH value of 5.5-6.0 prevents a decrease in Salmonella spp. concentration. Almost complete destruction of Salmonella spp. is observed within two days if the pH value is maintained below 5.5.
authors.affiliation: Environmental Science Center, The University of Tokyo, Tokyo 113-0033, Japan. fukushi@esc.u-tokyo.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Fukushi
authors.forename: S
authors.initials: S
authors.lastname: Babel
authors.forename: S
authors.initials: S
authors.lastname: Burakrai
mesh_terms: D000383:Agriculture; D001421:Bacteria, Anaerobic / Q000502:physiology; D019149:Bioreactors; D003247:Conservation of Natural Resources; D006863:Hydrogen-Ion Concentration; D012475:Salmonella / Q000472:pathogenicity*; D012722:Sewage / Q000382:microbiology*; D013534:Survival; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage