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Characterisation of source-separated household waste intended for composting
Swedish University of Agricultural Sciences, Sweden.ORCID iD: 0000-0001-5979-9521
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2011 (English)In: Bioresource Technology, Vol. 102, no 3, 2859-2867 p.Article in journal (Refereed) PublishedText
Abstract [en]

Large-scale composting of source-separated household waste has expanded in recent years in the Nordic countries. One problem can be low pH at the start of the process. Incoming biowaste at four composting plants was characterised chemically, physically and microbiologically. The pH of food waste ranged from 4.7 to 6.1 and organic acid concentration from 24 to 81mmolkg -1. The bacterial diversity in the waste samples was high, with all samples dominated by Gammaproteobacteria, particularly Pseudomonas and Enterobacteria (Escherichia coli, Klebsiella, Enterobacter). Lactic acid bacteria were also numerically important and are known to negatively affect the composting process because the lactic acid they produce lowers the pH, inhibiting other bacteria. The bacterial groups needed for efficient composting, i.e. Bacillales and Actinobacteria, were present in appreciable amounts. The results indicated that start-up problems in the composting process can be prevented by recycling bulk material and compost.

Place, publisher, year, edition, pages
Elsevier, 2011. Vol. 102, no 3, 2859-2867 p.
National Category
Other Environmental Engineering
URN: urn:nbn:se:kth:diva-182609DOI: 10.1016/j.biortech.2010.10.075ISI: 000286904500101ScopusID: 2-s2.0-78650820596OAI: diva2:905221

QC 20160316

Available from: 2016-02-22 Created: 2016-02-22 Last updated: 2016-03-16Bibliographically approved

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Sundberg, Cecilia
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