High-temperature And Aeration Composting Sewage Sludge With Complex Microbial Inoculant

Compost experiment had been done twice for this subject. The first experiment began in Aug 10 2003 in the Yangjiabao waste water disposal company in Taiyuan of Shanxi Province. The second experiment began in Dem 28 2003 in China Agriculture University. The paper designed two kinds of disposal methods which were disposal of inoculation of complex microbial inoculant and disposal of without inoculation of complex microbial inoculants. The paper studied the change of physical, chemical index and biological index in the process of aerobic compost with sewage sludge and discussed that whether the disposal of inoculation of complex microbial inoculants can reduce the time of compost and improve the efficiency.The first part took temperature, moisture, PH and C/N as the main technological index. Through those indexes the paper judged the pace of the course of compost and whether the compost is completely maturated. The second part studied the rule of community succession of various microbes and judged the superior community in the process of compost from the angle of microbe index, according to the curve of the number of microbe change with time. Meanwhile the paper analyzed the killing efficiency of sewage sludge of aerobic compost with high-temperature to coliform and whether the final product poisoned the plant. The research has showed that:1.Disposal of inoculation of complex microbial inoculants and the disposal of without inoculation of complex microbial inoculants are under high-temperature at the same time, but the high-temperature period of the former lasted longer than the later relatively.2.Disposal of inoculation of complex microbial inoculants maturated three days earlier than the disposal of without inoculation of complex microbial inoculants did in the practical compost experiment, taking the C/N as the maturity index.3.Microbe in the composting materials were various and in great number. Bacteria are in the greatest number which is about 108 CFU/g dry materials. The number of fungi is the second largest which about 104 are. The number of actinomyces is relatively small.4.No matter before the ferment or in the ferment or after the ferment, bacteria is in the largest number, the number of fungi and actinomyces is relatively small.5.During the course of ferment the bacteria is the superior community which plays a relatively important role in the calefaction for ferment.6.The killing rate of aerobic compost of compelled ventilation to coliform can reach 100% in the successful condition.7.At the end of the indoor simulative compost experiment, the compost product did not completely maturate and it was still poisoned to the growth of plant.