Hygienization of sludge through anaerobic digestion at 35, 55 and 60 ºC

Kjerstadius, HamseLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH (author)

Legislation in Sweden and the European Union concerning the use of sewage sludge in agriculture is under revision and future concentration limits for pathogens in treated sludge are likely to be expected. The aim of this study was to evaluate the hygienization of Salmonella, Escherichia coli, Enterococcus and Clostridium perfringens through continuous anaerobic digestion at 35, 55 or 60 ºC as well as to investigate process stability and methane production at 60 ºC. The results indicated that digestion at 55 or 60 ºC with a minimum exposure time of 2 h resulted in good reduction of Salmonella, E. coli and Enterococcus and that anaerobic digestion thus could be used to reach the concentration limits suggested for the EU, as well as in Sweden. Furthermore, stable continuous anaerobic digestion of sludge was achieved at 60 ºC, however with 10% less methane production compared to digestion at 35 and 55 ºC.

la Cour Jansen, JesLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)vat-jcj (author)
De Vrieze, Jo (author)
Haghighatafshar, SalarLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-shr (author)
Davidsson, ÅsaLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)vat-asv (author)
Avdelningen för kemiteknikInstitutionen för processteknik och tillämpad biovetenskap (creator_code:org_t)

In:Water Science and Technology: IWA Publishing68:10, s. 2234-22390273-12231996-9732

By the author/editor: Kjerstadius, Ham ...; la Cour Jansen, ...; De Vrieze, Jo; Haghighatafshar, ...; Davidsson, Åsa

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