Study on Effect on Dynamics Model of Biodegration of Organic Matter in Aerobic Composting of Human Feces from Temperature
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 biodegradation of organic matters under the thermophilic and mesophilic conditions. The results indicated that: more 70% removal of fecal organic matters(mainly in first 6-8 days) observed at 60°C while more 63% (mainly in first 10-11 days) at 35°C in a two-week composting period. Removal of organic matters of thermophilic conditions was more than that of mesophilic conditions with maturity period (at 60°C) shorter than that(at 35°C). The organic matter’s biochemical degradation of similar level 1 dynamics model can build. Using the experimental data of composting reaction, calculated out respectively reaction kinetics constants 0.4413(at 60°C) and0.2864(at 35°C), the former is as 1.65 times as the latter. It indicated that thermophilic composting could be considered to reach more than 70% fecal organic removal and shorten maturity period of compost.
Dongye Sun, Wen-Pei Sung and Ran Chen
F. Bai and X. C. Wang, "Study on Effect on Dynamics Model of Biodegration of Organic Matter in Aerobic Composting of Human Feces from Temperature", Applied Mechanics and Materials, Vols. 71-78, pp. 2493-2496, 2011