Effect on Biodegration of Organic Matter and Change of Biomass in Aerobic Composting of Human Feces from Tempreture

摘要

Aerobic composting is a method for sanitary disposal of human feces as has been used in bio-toilet systems which can be used at family in city to save water and to control water pollution. In this study, batch experiments were conducted using a closed aerobic composting reactor with sawdust as the bulky matrix to simulate the condition of a bio-toilet for sanitary disposal of human feces. Attention was paid to the biodegration of organic matter and change of biomass under the thermophilic and mesophilic conditions. The results indicated that: more 70% fecal organic matters(mainly in first day) observed at 60℃ while more 63% fecal organic matters(mainly in first 4 days) observed at 35℃ in a two-week composting period during aerobic composting. It indicated that the change of biomass was a positive correlation with biodegradation of organic matters(COD)(r2=0.9486 at 60℃ while r2=0.9296 at 35℃) and 1.299×1012cfu biomass/removal of organic matters(g) at 60℃ while 6.80×1011cfu biomass/removal of organic matters(g) at 35℃.