This study was undertaken to assess the technical feasibility of using the anaerobic fluidized bed(AFB) process to digest secondary biological sludge at four hydraulic retention times(HRT):1, 2.5, 5, and 10 days.

• 为研究厌气流化床处理二次污泥的技术可行性；分别用1；2.；5；5和10天的水力停留时间(HRT)进行试验。