title: Performance of airlift MBR for on-site treatment of slaughterhouse wastewater in urban areas of Vietnam.
abstract: In many cities in Vietnam, wastewater generated in slaughterhouses is normally discharged directly into surface waters without treatment. Management of slaughterhouse wastewater (SHWW) is difficult due to the lack of infrastructure for conveyance to centralized facilities. On-site treatment presents one cost-effective way of managing SHWW compared to mass improvement of infrastructure. This study evaluates the application of an airlift membrane bioreactor (AL-MBR) for on-site treatment of SHWW. The concentrations of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN) and NH4+-N in the simulated SHWW were 1,697 ± 317 mg/L, 891 ± 137 mg/L, 246 ± 65 mg/L and 171 ± 4.2 mg/L, respectively. The mixed-liquor volatile suspended solids in the aerobic and anoxic tanks were maintained at 5,000-6,000 mg/L. Air flow rate and cross flow velocity were maintained at 0.2 L/min and 0.8 m/s, respectively, to keep the trans-membrane pressure (TMP) stable at 0.8 bar and the membrane flux at 15-18 L/m2h bar (LMH/bar). The removal efficiencies of COD and TN were 95 ± 1.9% and 70 ± 3.3%, respectively, at a hydraulic retention time (HRT) of 2.5 days. This study shows that GL-MBR is a promising on-site solution for SHWW treatment.
authors.affiliation: Institute of Meteorology Hydrology and Climate Change, 23/62 Nguyen Chi Thanh, Dongda, Hanoi, Vietnam E-mail: atdo@mail.usf.edu.
authors.forename: Anh Tien
authors.initials: AT
authors.lastname: Do
authors.affiliation: Institute of Meteorology Hydrology and Climate Change, 23/62 Nguyen Chi Thanh, Dongda, Hanoi, Vietnam E-mail: atdo@mail.usf.edu.
authors.forename: Dung Quang
authors.initials: DQ
authors.lastname: Bach
authors.affiliation: School of Environmental Science and Technology, Hanoi University of Science and Technology, C10 building, No. 1 Dai Co Viet, Hanoi, Vietnam.
authors.forename: Uan Khac
authors.initials: UK
authors.lastname: Do
authors.affiliation: Department of Civil, Environmental, Geo Engineering, University of Minnesota, 500 Pillsbury Drive S.E., Minneapolis, MN 55455-0116, USA.
authors.forename: Ana
authors.initials: A
authors.lastname: Prieto
authors.affiliation: Institute of Meteorology Hydrology and Climate Change, 23/62 Nguyen Chi Thanh, Dongda, Hanoi, Vietnam E-mail: atdo@mail.usf.edu.
authors.forename: Huynh Thi
authors.initials: HT
authors.lastname: Lan Huong
mesh_terms: D000003:Abattoirs; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002947:Cities; D007220:Industrial Waste; D008567:Membranes, Artificial; D009584:Nitrogen / Q000737:chemistry; D014744:Vietnam; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification
chemical_list: D007220:Industrial Waste; D008567:Membranes, Artificial; D009584:Nitrogen; D062065:Wastewater