title: Integration of aerobic granular sludge and mesh filter membrane bioreactor for cost-effective wastewater treatment.
abstract: Conventional MBR has been mostly based on floc sludge and the use of costly microfiltration membranes. Here, a novel aerobic granule (AG)-mesh filter MBR (MMBR) process was developed for cost-effective wastewater treatment. During 32-day continuous operation, a predominance of granules was maintained in the system, and good filtration performance was achieved at a low trans-membrane pressure (TMP) of below 0.025 m. The granules showed a lower fouling propensity than sludge flocs, attributed to the formation of more porous biocake layer at mesh surface. A low-flux and low-TMP filtration favored a stable system operation. In addition, the reactor had high pollutant removal efficiencies, with a 91.4% chemical oxygen demand removal, 95.7% NH(4)(+) removal, and a low effluent turbidity of 4.1 NTU at the stable stage. This AG-MMBR process offers a promising technology for low-cost and efficient treatment of wastewaters.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Li
authors.forename: Yun-Kun
authors.initials: YK
authors.lastname: Wang
authors.forename: Guo-Ping
authors.initials: GP
authors.lastname: Sheng
authors.forename: Yong-Xin
authors.initials: YX
authors.lastname: Gui
authors.forename: Lei
authors.initials: L
authors.lastname: Yu
authors.forename: Tong-Qing
authors.initials: TQ
authors.lastname: Xie
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
mesh_terms: D000332:Aerobiosis; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000191:economics* / Q000382:microbiology; D003362:Cost-Benefit Analysis; D005374:Filtration / Q000191:economics / Q000295:instrumentation*; D008567:Membranes, Artificial; D011312:Pressure; D012722:Sewage / Q000382:microbiology*; D062065:Wastewater / Q000032:analysis* / Q000191:economics / Q000382:microbiology; D018508:Water Purification / Q000191:economics* / Q000295:instrumentation*
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D062065:Wastewater