Abstract:
:The aim of the study was to assess the effect of pasteurisation, as set by the European regulation EC 1774/2002, on selected pathogens and indicator organisms. Unpasteurised substrate (biowaste), including animal by-products from a full-scale biogas plant was heat treated under laboratory conditions at 70 degrees C and 55 degrees C for 30 min and 60 min. Heat treatment at 55 degrees C for 60 min was not sufficient to achieve a hygienically acceptable product. Heat treatment at 70 degrees C for 30 min and 60 min was effective in reducing pathogenic bacteria, Ascaris suum eggs, Swine vesicular disease virus and indicator organisms. However, this level of pasteurisation will still not reduce the quantity of Clostridia spores, or completely inactivate heat-resistant viruses such as Porcine parvovirus or Salmonella phage 28B. The results still give cause for some concern regarding the use of digested residue from biogasplants in agriculture.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Sahlström L,Bagge E,Emmoth E,Holmqvist A,Danielsson-Tham ML,Albihn Adoi
10.1016/j.biortech.2007.09.071subject
Has Abstractpub_date
2008-11-01 00:00:00pages
7859-65issue
16eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00816-4journal_volume
99pub_type
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