title: Membrane fouling controlled by coagulation/adsorption during direct sewage membrane filtration (DSMF) for organic matter concentration.
abstract: Unlike the role of the membrane in a membrane bioreactor, which is designed to replace a sediment tank, direct sewage membrane filtration (DSMF), with the goal of concentrating organic matters, is proposed as a pretreatment process in a novel sewage treatment concept. The concept of membrane-based pretreatment is proposed to divide raw sewage into a concentrated part retaining most organics and a filtered part with less pollutant remaining, so that energy recovery and water reuse, respectively, could be realized by post-treatment. A pilot-scale experiment was carried out to verify the feasibility of coagulant/adsorbent addition for membrane fouling control, which has been the main issue during this DSMF process. The results showed that continuous coagulant addition successfully slowed down the increase in filtration resistance, with the resistance maintained below 1.0×10(13) m(-1) in the first 70 hr before a jump occurred. Furthermore, the adsorbent addition contributed to retarding the occurrence of the filtration resistance jump, achieving simultaneous fouling control and chemical oxygen demand (COD) concentration improvement. The final concentrated COD amounted to 7500 mg/L after 6 days of operation.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: kbghko@gmail.com.
authors.forename: Hui
authors.initials: H
authors.lastname: Gong
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Jin
authors.affiliation: School of Resources & Environmental Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: wkj@mail.tsinghua.edu.cn.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000536:Aluminum Hydroxide / Q000737:chemistry; D057919:Biological Oxygen Demand Analysis; D005240:Feasibility Studies; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D005427:Flocculation; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000302:isolation & purification*; D010865:Pilot Projects; D011312:Pressure; D012722:Sewage / Q000032:analysis*; D012973:Sodium Hypochlorite / Q000737:chemistry; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D009930:Organic Chemicals; D012722:Sewage; C016213:aluminum oxychloride; D000536:Aluminum Hydroxide; D012973:Sodium Hypochlorite
keywords: Coagulation/adsorption; Direct sewage membrane filtration; Membrane fouling; Resource recovery; Sewage concentrating; Wastewater