title: Evaluation of a long-term operation of a submerged nanofiltration membrane bioreactor (NF MBR) for advanced wastewater treatment.
abstract: 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.
authors.affiliation: Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan. jaehoonchoi2@hanmail.net
authors.forename: J H
authors.initials: JH
authors.lastname: Choi
authors.forename: K
authors.initials: K
authors.lastname: Fukushi
authors.forename: H Y
authors.initials: HY
authors.lastname: Ng
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
mesh_terms: D019149:Bioreactors; D002244:Carbon / Q000737:chemistry; D002850:Chromatography, Gel; D005069:Evaluation Studies as Topic; D007220:Industrial Waste; D008567:Membranes, Artificial; D010758:Phosphorus; D012722:Sewage; D013997:Time Factors; D014462:Ultrafiltration / Q000379:methods*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000032:analysis; D018508:Water Purification / Q000379:methods
chemical_list: D007220:Industrial Waste; D008567:Membranes, Artificial; D012722:Sewage; D014867:Water; D010758:Phosphorus; D002244:Carbon