EXPERIMENTAL STUDY ON THE PERFORMANCE OF SLAUGHTERHOUSE SLUDGE COMPOST AND ITS INFLUENCING FACTORS

An experimental study on composting and utilization of the slaughterhouse sludge around Yibin county was carried out，taking germination index as the reference，to evaluate the effects of temperature，added agents，fillers，pile size，initial pH，carbon to nitrogen ratio and initial moisture content on the degree of compost maturity． The results show that: Compost temperature went up initially and then decreased，getting a peak on the 13th day． The optimistic composting effect could be gained when the temperature reached to 60 ～ 70 ℃ during the high temperature phase． Adding active bacterium agents could greatly enhance the ability of organic matter degradation and shorten the time and improve the fertilizer s performance; Using sawdust as the filling material could promote the process of composting greatly; In order to facilitate rapid decomposition of sludge，the initial pH value should be controlled at about 7． 5，carbon nitrogen ratio ( C/N) is about 25，the initial moisture content of 55%． The study can provide theoretical references for the harmless and economical utilization on slaughterhouse sludge．