| Greenhouse gas life cycle assessment of products arising from the rendering of mammalian animal by-products in the UK. | |
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MedLine Citation:
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PMID: 22129062 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Animal by-products (ABPs) are unavoidable by-products of meat production that are categorised under EU legislation into category 1, 2 and 3 materials, which are normally treated by rendering. Rendering is a thermal process that produces rendered fat and protein. Heat is provided from the combustion of natural gas and self-produced rendered fat. The main objectives of the study were: (i) to assess energy intensity in the UK rendering industry, and (ii) to quantify the greenhouse gas emissions associated with the production of mammalian rendered products using life cycle assessment. Thermal energy requirements were 2,646 and 1,357 kJ/kg, whereas electricity requirements were 260 and 375 kJ/kg for category 1 and 3 ABP respectively. Fossil CO2 emissions were -0.77 and 0.15 kg CO2e/kg category 1 and 3 mammalian rendered fat respectively and 0.15 kg CO2e/kg processed animal protein. These were low relative to vegetable products such as palm oil and soya bean meal because (i) ABPs were considered wastes that do not incur the environmental burden of their production, and (ii) the rendering process produces biofuels that can be used to generate energy that can be used to offset the use of fossil fuels in other systems. |
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Authors:
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Angel Diego Ramirez; Andrea C Humphries; Stephen L Woodgate; Robert G Wilkinson |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-30 |
Journal Detail:
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Title: Environmental science & technology Volume: - ISSN: 1520-5851 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-12-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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