In order to seek for the ways of emission of sewage sludge by economic and environmental methods,promote the harmless and resource utilization of sludge,filter out high quality organic fertilizer formula and consistent with industry standards NY 525-2002.Selecting suitable conditioner according to feature of sludge and local condition,the dynamic change of physicochemical properties and microbiological characteristics during the composting process were studied.The results showed that all treatment reached m...