Department of Environmental Engineering, Inha University, Namgu, Yonghyun dong 253, Incheon, Republic of Korea.
Water Sci Technol. 2013;68(2):394-9. doi: 10.2166/wst.2013.191.
A two-stage anaerobic fluidized-bed membrane bioreactor (SAF-MBR) system was applied for the treatment of primary-settled domestic wastewater that was further pre-treated by either 10 μm filtration or 1 mm screening. While the different pre-treatment options resulted in different influent qualities, the effluent qualities were quite similar. In both cases at a total hydraulic retention time of 2.3 h and 25 °C, chemical oxygen demand and biochemical oxygen demand (BOD5) removals were 84-91% and 92-94%, with effluent concentrations lower than 25 and 7 mg/L, respectively. With a membrane flux of 6-12 L/m(2)/h, trans-membrane pressure remained below 0.2 bar during 310 d of continuous operation without need for membrane chemical cleaning or backwashing. Biosolids production was estimated to be 0.028-0.049 g volatile suspended solids/g BOD5, which is far less than that with comparable aerobic processes. Electrical energy production from combined heat and power utilization of the total methane produced (gaseous and dissolved) was estimated to be more than sufficient for total system operation.
两段式厌氧流化床膜生物反应器（SAF-MBR）系统用于处理经 10μm 过滤或 1mm 筛网预处理的一级沉淀生活污水。不同的预处理选择导致进水水质不同，但出水水质却非常相似。在总水力停留时间为 2.3 小时和 25°C 的情况下，化学需氧量和生化需氧量（BOD5）的去除率分别为 84-91%和 92-94%，出水浓度分别低于 25 和 7mg/L。在膜通量为 6-12L/m(2)/h 的情况下，在 310 天的连续运行过程中，跨膜压力始终低于 0.2bar，无需进行膜化学清洗或反冲洗。生物固体产量估计为 0.028-0.049g 挥发性悬浮固体/gBOD5，远低于可比好氧工艺。从总甲烷（气态和溶解态）的联合热电利用中产生的电能估计足以满足系统的总运行需求。
