[Variation of oxygen concentration during aerobic composting of pig manure].
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 microl x L(-1) x 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 microl x L(-1) x s(-1) after 5-7 days at the stage of high temperature. A ventilation strategy was proposed based on the analyses.
Chen
Tongbin
T
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. chentb@igsnrr.ac.cn
Zheng
Yuqi
Y
Gao
Ding
D
Kong
Jiansong
J
Luo
Wei
W
D000818:Animals; D001420:Bacteria, Aerobic / Q000378:metabolism; D001673:Biodegradation, Environmental; D005308:Fertilizers; D008372:Manure; D010100:Oxygen / Q000032:analysis*; D010101:Oxygen Consumption; D012037:Refuse Disposal; D013552:Swine; D013696:Temperature
D005308:Fertilizers; D008372:Manure; D010100:Oxygen