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Effects of pH and microbial composition on odour in food waste composting

Sundberg, Cecilia and Yu, D and Franke-Whittle, Ingrid H. and Kauppi, Sari and Smårs, Sven and Insam, Heribert and Romantschuk, Martin and Jönsson, Håkan (2013). Effects of pH and microbial composition on odour in food waste composting. Waste Management. 33:1, 204-211
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Official URL: http://dx.doi.org/10.1016/j.wasman.2012.09.017

Abstract

A major problem for composting plants is odour emission. Slow decomposition during prolonged low-pH conditions is a frequent process problem in food waste composting. The aim was to investigate correlations between low pH, odour and microbial composition during food waste composting. Samples from laboratory composting experiments and two large scale composting plants were analysed for odour by olfactometry, as well as physico-chemical and microbial composition. There was large variation in odour, and samples clustered in two groups, one with low odour and high pH (above 6.5), the other with high odour and low pH (below 6.0). The low-odour samples were significantly drier, had lower nitrate and TVOC concentrations and no detectable organic acids. Samples of both groups were dominated by Bacill-ales or Actinobacteria, organisms which are often indicative of well-functioning composting processes, but the high-odour group DNA sequences were similar to those of anaerobic or facultatively anaerobic species, not to typical thermophilic composting species. High-odour samples also contained Lactobacteria and Clostridia, known to produce odorous substances. A proposed odour reduction strategy is to rapidly overcome the low pH phase, through high initial aeration rates and the use of additives such as recycled compost. (c) 2012 Elsevier Ltd. All rights reserved.

Authors/Creators:Sundberg, Cecilia and Yu, D and Franke-Whittle, Ingrid H. and Kauppi, Sari and Smårs, Sven and Insam, Heribert and Romantschuk, Martin and Jönsson, Håkan
Title:Effects of pH and microbial composition on odour in food waste composting
Series/Journal:Waste Management (0956-053X)
Year of publishing :2013
Volume:33
Number:1
Page range:204-211
Number of Pages:8
Publisher:Elsevier Ltd.
ISSN:0956-053X
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Other Envionmental Biotechnology
Keywords:Lactic acid bacteria, Olfactometry, Microarray, Organic acids
URN:NBN:urn:nbn:se:slu:epsilon-e-1999
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1999
Additional ID:
Type of IDID
Web of Science (WoS)000312615800026
DOI10.1016/j.wasman.2012.09.017
ID Code:11247
Faculty:NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:03 Jul 2014 11:13
Metadata Last Modified:15 Apr 2015 22:55

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