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Cross-flow membrane bioreactor for domestic wastewater treatment and its biological behavior



Cross-flow membrane bioreactor for domestic wastewater treatment and its biological behavior



Huanjing Kexue 18(6): 23-26



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 cntdot 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 0.65 mg VSS/mg COD and the decay constant, 0.1 d-1. Furthermore, the biofacies analysis of CMBR is included.

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Accession: 008399318

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