A laboratory study of survival of selected microorganisms after heat treatment of biowaste used in biogas plants
| Autor: | Eva Emmoth, Ann Albihn, Leena Sahlström, Elisabeth Bagge, Annika Holmqvist, Marie-Louise Danielsson-Tham |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Hot Temperature Time Factors Survival Swine Virulence Factors Microorganism Colony Count Microbial Pasteurization Bioengineering Guidelines as Topic Biology medicine.disease_cause Escherichia coli O157 Microbiology law.invention Clostridia Feces Bioreactors Biogas law medicine Animals Humans Parasites Food science Anaerobiosis Waste Management and Disposal Ascaris suum Ovum Indicator organism ADP Ribose Transferases Clostridium Bacteria Renewable Energy Sustainability and the Environment Pathogenic bacteria General Medicine Parvovirus Porcine biology.organism_classification Listeria monocytogenes Enterovirus B Human Refuse Disposal Anaerobic digestion Biodegradation Environmental Viruses |
| Zdroj: | Bioresource technology. 99(16) |
| ISSN: | 0960-8524 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect