Research on the utilization of sludge from municipal sewage treatment plants

Abstract：Sludge is the solid waste, and also it is a kind of resource.Utilization of sludge is an effective way to its treatment and disposal.In the paper, sludge from municipal sewage treatment plant in Jiaozuo is used as test material.By adding fly ash and vaccinating biogas into sludge, the test on anaerobic fermentation is implemented.The results show that methane volume fraction is above 60% through gas chromatograph detection, which can further be used.The concentration of copper, zinc, nickel, chromium and other heavy metals are detected by atomic absorption spectrophotometry, which are in line with agricultural standards.The research provides the basis for the sludge utilization in Jiaozuo, also seeks a feasible program for exploring the best utilization of sludge in Jiaozuo.

Keyword：sludge;anaerobic fermentation;methane;fly ash;heavy metal;