【摘要】 通过水处理中慢滤池和滤饼过滤原理的借鉴,将生物滤池引入生物膜反应器,利用游离的活性污泥和部分脱落的生物膜及颗粒滤料组成污泥过滤层进行过滤出水以提高出水水质.分析了污泥滤层的过滤机理及主要影响因素,并研究了在不同污泥质量浓度、不同滤料和不同滤速下水头损失和浊度的变化情况.试验结果表明,在滤料粒径为1 0～1 6mm,滤速范围为0 3～1 0m/h,污泥质量浓度不大于1200mg/L情况下,出水浊度值均在10NTU以下,反冲洗周期长(较曝气生物滤池),证明了污泥过滤是可行的.更多还原

【Abstract】 Sludge filtration, composed of free activated sludge, detached biofilm and granule media, was used to diminish suspend solid (SS) in effluent of Sequencing Batch Biofilm Reactor (SBBR) through slow and cake filtration. The mechanism and major influence factors were analyzed together with headloss and turbidity of various granule diameters, sludge concentrations and filtration rates. The results showed that under the condition of 1.0～1.6 mm granule diameter, 0.3～1.0 m/h filtration rate and less than 1 200 mg/L sludge concentration, turbidity of effluent was all below 10 NTU, and the cycle of backwashing was longer than biological aerated filter (BAF), which testifies that sludge filtration was feasible.更多还原