Choi J H, Fukushi K, Ng H Y, Yamamoto K
Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan.
Water Sci Technol. 2006;53(6):131-6. doi: 10.2166/wst.2006.185.
Nanofiltration (NF) is considered as one of the most promising separation technologies to obtain a very good-quality permeate in water and wastewater treatment. A submerged NF membrane bioreactor (NF MBR) using polyamide membranes was tested for a long-term operation and the performance of the NF MBR was compared with that of a microfiltration MBR (MF MBR). Total organic carbon (TOC) concentration in the permeate of the NF MBR ranged from 0.5 to 2.0 mg/L, whereas that of the MF MBR showed an average of 5 mg/L. This could be explained by the tightness of the NF membrane. Although the concentration of organic matter in the supernatant of the NF MBR was higher than that in the permeate due to high rejection by the NF membrane, the NF MBR showed excellent treatment efficiency and satisfactory operational stability for a long-term operation.
纳滤（NF）被认为是水和废水处理中获得高质量渗透液最有前景的分离技术之一。对使用聚酰胺膜的浸没式纳滤膜生物反应器（NF MBR）进行了长期运行测试，并将NF MBR的性能与微滤膜生物反应器（MF MBR）的性能进行了比较。NF MBR渗透液中的总有机碳（TOC）浓度范围为0.5至2.0 mg/L，而MF MBR的TOC浓度平均为5 mg/L。这可以通过NF膜的致密性来解释。尽管由于NF膜的高截留率，NF MBR上清液中的有机物浓度高于渗透液中的浓度，但NF MBR在长期运行中表现出优异的处理效率和令人满意的运行稳定性。
