The Respiration Rate of Composting Pig Manure

Autor:	Stuart Guy, Andrew Barker, Angela L. Cronjé, Claire Turner, Adrian G. Williams
Rok vydání:	2004
Předmět:	Ecology Chemistry Compost Environmental engineering Soil Science chemistry.chemical_element engineering.material Straw Decomposition Manure Oxygen Reaction rate Animal science Respiration engineering Respiration rate Waste Management and Disposal
Zdroj:	Compost Science & Utilization. 12:119-129
ISSN:	2326-2397 1065-657X
DOI:	10.1080/1065657x.2004.10702170
Popis:	The rate at which oxygen is consumed during composting is a measure of aerobic microbial activity and is linked to the rate of organic material decomposition. The rate of loss in mass is a function of the mass of the degradable organic fraction and is related to oxygen uptake rate by the reaction rate coefficient, k. The decomposition of a pig manure and straw mix was investigated at temperatures between 10°C and 70°C using respirometric techniques. The oxygen concentrations in the reactor were measured continuously for about 4 days and then converted to hourly oxygen uptake rates for each incubation temperature, T. The specific oxygen uptake rate was used to calculate the reaction rate coefficient at T, kT, for the observed fast and slow stages of decomposition. The effect of the environmental factors was taken into account using a multiplicative approach and a relationship, which expressed kT for each stage as a function of T, was formulated. The maximum measured rate of activity occurred during the fas...
Databáze:	OpenAIRE
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