title: Efficiency of autothermal thermophilic aerobic digestion and thermophilic anaerobic digestion of municipal wastewater sludge in removing Salmonella spp. and indicator bacteria.
abstract: The study is focused on the comparison of autothermal thermophilic aerobic digestion, thermophilic and mesophilic anaerobic digestion, based on long-term monitoring of all processes in full-scale wastewater treatment plants, with an emphasis on the efficiency in destroying pathogens. The hygienisation effect was evaluated as a removal of counts of indicator bacteria, thermotolerant coliforms and enterococci as CFU/g total sludge solids and a frequency of a positive Salmonella spp. detection. Both thermophilic technologies of municipal wastewater sludge stabilisation had the capability of producing sludge A biosolids suitable for agricultural land application when all operational parameters (mainly temperature, mixing and retention time) were stable and maintained at an appropriate level.
authors.affiliation: Dept of Water Technology and Environmental Engineeringy, Institute of Chemical Technology, Technická 5, Prague CZ -166 28, Czech Republic. Jana.Zabranska@vscht.cz
authors.forename: J
authors.initials: J
authors.lastname: Zábranská
authors.forename: M
authors.initials: M
authors.lastname: Dohányos
authors.forename: P
authors.initials: P
authors.lastname: Jenícek
authors.forename: H
authors.initials: H
authors.lastname: Růziciková
authors.forename: A
authors.initials: A
authors.lastname: Vránová
mesh_terms: D000383:Agriculture; D001421:Bacteria, Anaerobic / Q000502:physiology*; D019149:Bioreactors; D003247:Conservation of Natural Resources; D005160:Facility Design and Construction; D012475:Salmonella / Q000302:isolation & purification* / Q000378:metabolism; D012722:Sewage; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage