Variation of oxygen concentration during aerobic composting of pig manure

Abstract

Abstract: Analysis with oxygen monitoring system on the variation of oxygen concentration at different stages of pig manure composting showed that in a short time after ventilation at different composting stages,the oxygen concentration increased by 17% or more,and the oxygen consumption rate at temperature increasing stage and at the beginning of high temperature stage could reach up to more than 900 μl·L^-1·s^-1,while decreased at the stages of high temperature and of dehydration as the composting process going on.The oxygen consumption rate decreased to lower than 100 μl·L^-1·s^-1 after 5～7 days at the stage of high temperature.A ventilation strategy was proposed based on the analyses.

Key words: Pig manure, Compost, Oxygen consumption rate, Ventilation

CLC Number:

S141.4

CHEN Tongbin, ZHENG Yuqi, GAO Ding, KONG Jiansong, LUO Wei. Variation of oxygen concentration during aerobic composting of pig manure[J]. Chinese Journal of Applied Ecology, 2004, (11): 2179-2183.

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