[Removal of polio- and parvovirus in sewage-sludge by lime-treatment (author's transl)].
Lime (CaO) applied as conditioner for dewatering municipal sewage sludge in filter-presses is suitable to disinfect sewage sludge with respect to virus. A pH-rise to more than 12 followed by release of ammonia inactivates Polio- and Bovine Parvovirus. Addition of 3 kg CaO and more per m3 of raw sludge inactivates Poliovirus within 30 minutes. 7.5 kg CaO per m3 of anaerobically digested sludge are required to inactivate Polio-virus within 5 days and Bovine Parvovirus within 24 hours. Parvovirus seems to be more sensitive against free ammonia than Poliovirus, but less sensitive against high pH-values.
D002118:Calcium / Q000494:pharmacology; D017610:Calcium Compounds; D004203:Disinfection; D006863:Hydrogen-Ion Concentration; D010087:Oxides / Q000494:pharmacology; D010321:Parvoviridae / Q000254:growth & development; D017955:Poliovirus / Q000254:growth & development; D012722:Sewage; D013242:Sterilization
D002118:Calcium; D017610:Calcium Compounds; C016538:lime; D010087:Oxides; D012722:Sewage
Inaktivierung von Polio- und Parvovirus im Klärschlamm durch Kalkbehandlung.