自生生物动态膜反应器处理市政污水的特性

实验采用0．1mm孔径的筛网自制膜组件制备自生生物动态膜反应器，考察了自生生物动态膜的形成和再生，膜孔径、膜通量和污泥浓度对自生生物动态膜形成的影响，以及对模拟城市污水的处理效果．实验结果表明，自生生物动态膜可在48h左右形成，其中滤饼层在10min左右即可形成，自生生物动态膜的再生可在50min左右完成．在HRT为4h．，膜通量为20，8Lm^-1h^-1，MLSS为4000mg／L左右时，系统稳定运行40d里，出水水头压差保持在9mm左右，出水的SS未检出，浊度均小于5NTU，氨氮的去除率保持在80％以上，COD平均去除率为87．5％，膜分离对有机物的平均去除率为18．6％．

Study on treating municipal wastewater by self-forming bio-dynamic membrane reactor

Using a self-forming bio-dynamic membrane reactor (SFDMR) Equipped with a 0. 1mm nelon mesh as filter material the authors observed the forming and recovering of self-forming bio-dynamic membrane ( SFDM ). The effects of pore size, flux and MLSS on the formation of SFDM as well as the result of the treatment on analogue municipal wastewater were all studied in details. The experiment showed that the gel layer and the SFDM formed respectively within 10 minutes and 48 hours while the recovery of SFDM could completed within 50 minutes. After 40 days continuous operation under the condition of HRT 4h, flux of SFDM 20. 8 Lm-2h-1, MLSS 4000mg/L and water head drop 9mm, no SS was detected in the effluence and its turbidity being les than 5 NTU and removal rates of COD and NH3-N being about 80% and 87.5% respectively. Its average removal rate of organism was 18.6%.