A laboratory study of survival of selected microorganisms after heat treatment of biowaste used in biogas plants

被引：76

作者：

Sahlstrom, Leena ^{[1
]}

Bagge, Elisabeth ^{[1
]}

Emmoth, Eva ^{[1
]}

Holmqvist, Annika ^{[1
,2
]}

Danielsson-Tham, Marie-Louise ^{[3
]}

Albihn, Ann ^{[1
]}

机构：

[1] Natl Vet Inst SVA, SE-75189 Uppsala, Sweden

[2] Dalarna Univ, Dept Math Sci & Technol, SE-78188 Borlange, Sweden

[3] Swedish Univ Agr Sci, Dept Biomed Sci & Vet Publ Hlth, SE-75007 Uppsala, Sweden

来源：

BIORESOURCE TECHNOLOGY | 2008年 / 99卷 / 16期

关键词：

anaerobic digestion; fertiliser; Campylobacter; enterococci; E. coli O157;

D O I：

10.1016/j.biortech.2007.09.071

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：7859 / 7865

页数：7

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