Study on the Condition of Swine Manure Composting

The effects of various bulking agents, C/N ratio, aeration forms and additions were examined on the efficiency of the swine manure composting in this experiment. The results were as follows: the finished composts made from the sawdust had better quality than that made from the rice hull; second, the changes of chemical characteristics had no significant differences between mechanical ventilation and artificial turning. But the physical characteristics of the composts with mechanical ventilation were inferior to that with artificial turning; Third, the high C/N ratio of the materials was beneficial to temperature rising and humus-formation, but adding more sawdust will increase the composting cost; Adding the deodorant addition or microbial formulation does not improve most of the chemical characteristics obviously, but they could improve the compost's physical characteristics and diminish the odor. All treatments could reach their maturation in five weeks except the treatment of adding rice hull.