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Influence of different temperature and aeration regulation strategies on respiration in composting of organic household waste

Smårs, Sven (2002). Influence of different temperature and aeration regulation strategies on respiration in composting of organic household waste. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Agraria, 1401-6249 ; 324
ISBN 91-576-6158-8
[Doctoral thesis]

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Abstract

A laboratory scale composting reactor was constructed for systematic studies of the effects of oxygen levels and temperature on carbon and nitrogen turnover in household waste compost. The reactor was equipped for independent control of oxygen level and temperature. The results presented showed that the performance of the reactor concerning uniform regulation of temperature and O2 level in the compost matrix, gas and over time was good. The effect of three temperature regimes performed at the constant level of 16% O2 in the compost gas was studied in eight experimental runs in the compost reactor. The effect of reduced O2 levels of 2.5 and 1% in the compost gas was studied in two experimental runs for one of the above temperature regimes. It was found that the highest rate of degradation was achieved when the temperature was actively regulated to below 40°C during a low pH phase. The lowest degradation was obtained when the temperature was already regulated to 55°C from the start. It was further found that reduced O2 levels of 2.5 and 1% in the compost gas reduced the degradation rate and enhanced methane emission.

Authors/Creators:Smårs, Sven
Title:Influence of different temperature and aeration regulation strategies on respiration in composting of organic household waste
Year of publishing :April 2002
Volume:324
Number of Pages:27
Papers/manuscripts:
NumberReferences
ALLI. Smårs, S., Jönsson, H., Beck-Friis, B. and Kirchmann, H., 2001. An advanced experimental composting reactor for systematic simulation studies. Journal of Agricultural Engineering Research 78 (4), 415-422. II. Beck-Friis, B., Smårs, S., Jönsson, H. and Kirchmann, H., 2001. Gaseous emissions of carbon dioxide, ammonia and nitrous oxide from organic household waste in a compost reactor under different temperature regimes. Journal of Agricultural Engineering Research 78 (4), 423-430. III.* Beck-Friis, B., Smårs, S., Jönsson, H., Eklind, Y. and Kirchmann, H. 2003. Composting of source-separated household organics at different oxygen levels: Gaining an understanding of the emission dynamics. Compost Science & Utilization 11 (1), 41-50. IV.* Smårs, S., Gustafsson, L., Beck-Friis, B. and Jönsson, H. 2002. Improvement of the composting time for household waste during an initial low pH phase by mesophilic temperature control. Bioresource Technology 84 (3), 237-241. * Papers III and IV have been published after the thesis was printed.
Place of Publication:Uppsala
ISBN for printed version:91-576-6158-8
ISSN:1401-6249
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:Q Food science > Q70 Processing of agricultural wastes
Subjects:Not in use, please see Agris categories
Agrovoc terms:household wastes, organic wastes, solid wastes, composting, biodegradation, aeration, biogas, bioreactors, sweden
Keywords:household waste, oxygen, temperature, control, compost, reactor, nitrogen, carbon, carbon dioxide, greenhouse gas, pH, fatty acids.
ID Code:251
Department:(LTJ, LTV) > Institutionen för lantbruksteknik
Deposited By: Sven Smårs
Deposited On:29 Apr 2003 00:00
Metadata Last Modified:02 Dec 2014 10:03

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