错流式膜-生物反应器处理生活污水及其生物学研究

用错流式膜－生物反应器（ＣｒｏｓｆｌｏｗＭｅｍｂｒａｎｅＢｉｏＲｅａｃｔｏｒ简称ＣＭＢＲ）进行处理生活污水试验并研究其生物动力学参数．结果表明：当ＨＲＴ为５ｈ，ＳＲＴ为１５ｄ，膜面流速为４ｍ／ｓ，膜通量为７５、１５０Ｌ／（ｍ２·ｈ）时，ＣＭＢＲ处理生活污水试验的去除率为：ＣＯＤ＞９７％、ＮＨ３－Ｎ＞９７％、浊度≥９８％；对ＳＳ和总Ｅ．ｃｏｌｉ则达到１００％，出水水质优于建设部生活杂用水回用标准ＣＪ２５．１－８９．生物相分析表明，污泥中没有原、后生动物，只有菌胶团．推导了ＣＭＢＲ稳态运行时的生物浓度计算公式，进而求得表观产率因数Ｙｇ为０．６５，衰减常数Ｋｄ为０．１ｄ－１．

Cross-flow Membrane Bioreactor for Domestic Wastewater Treatment and Its Biological Behavior

It is proven that Crossflow Membrane BioReactor(CMBR)applied to domestic wastewater treatment,under conditions of hydraulic retention time 5h,sludge retention time 15d,membrane surface velocity 4m/s and membrane flux 75,150L/(m²·h),is technically feasible and reliable during six weeks.Removal rate of COD,NH₃-N,and turbidity of the system are equal to or higher than 97%,97% and 98%,SS and E.coli.,100%.The effluent quality is always better than the quality standard for reuse issued by the Ministry of Construction in China.An important formula to calculate the sludge concentration for CMBR at steady state is successfully derived from material balance equations.The apparent yield factor Y_g is approximately 0.65mgVSS/mg COD and the decay constant,0.1d^-1.Furthermore,the biofacies analysis of CMBR is included.