膜生物反应器与传统活性污泥法污泥混合液过滤特性的比较

Comparison of Sludge Filtration Characteristics Between a Membrane Bioreactor and a Conventional Activated Sludge Process

针对污泥混合液的过滤性能，在运行条件相同的情况下对膜生物反应器（MBR）与传统活性污泥法（cAS）进行比较．实验结果表明：MBR工艺污泥混合液的过滤阻力是CAS工艺过滤阻力的2～3倍；2种工艺悬浮液过滤阻力占总阻力的90％左右．过滤阻力分布实验表明，沉积层阻力占CAS工艺总阻力的87．30％，占MBR工艺总阻力的94．18％．

According to the filtration characteristics of sludge, a comparison between a membrane bioreactor （MBR） and a conventional activated sludge process（CAS） was carried out under similar conditions. Experiment results show that the filtration resistance in MBR was 2--3 times of that in CAS. The contribution of supernatant resistance to filtration resistance was about 90 % both in CAS and in MBR. The test on resistance distribution showed the cake resistance made up 87.30 % and 94.18 % of total resistance in CAS and MBR, respectively.