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Nitrous oxide and methane emissions from food waste composting at different temperatures
Swedish University of Agricultural Sciences .ORCID iD: 0000-0001-5979-9521
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2015 (English)In: Waste Management, Vol. 46, 113-119 p.Article in journal (Refereed) PublishedText
Abstract [en]

Emissions of methane (CH4) and nitrous oxide (N2O) from composting of source-sorted food waste were studied at set temperatures of 40, 55 and 67 degrees C in 10 trials performed in a controlled environment 200 L compost reactor. CH4 and N2O concentrations were generally low. In trials with 16% O-2, the mean total CH4 emission at all temperatures was 0.007% of the mineralized carbon (C), while at 67 degrees C this fraction was 0.001%. Total CH4 production was higher in the 40 degrees C trial and the limited oxygen (1% O-2) trial, with emissions of 0.029 and 0.132% of the mineralized C respectively. An early increase in N2O production was observed in trials with higher initial nitrate contents. Increased CH4 and N2O production in trials at 40 and 55 degrees C after 50% of the initial C was mineralized resulted in higher total greenhouse gas emissions. Overall, the global warming potentials in CO2-equivalents from CH4 emissions were higher than from N2O, except for composts run at 67 degrees C.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 46, 113-119 p.
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Other Environmental Engineering
URN: urn:nbn:se:kth:diva-182615DOI: 10.1016/j.wasman.2015.08.021ISI: 000366226300014ScopusID: 2-s2.0-84946488896OAI: diva2:905211

QC 20160308

Available from: 2016-02-22 Created: 2016-02-22 Last updated: 2016-03-08Bibliographically approved

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Sundberg, Cecilia
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