title: [Capability and microbial community analysis of a membrane bioreactor for acrylic fiber wastewater treatment].
abstract: Sequencing batch membrane bioreactor (SBMBR) was used for the treatment of acrylic fiber polymerization wastewater and acrylonitrile wastewater. The operation efficiencies of SBMBR under different wastewater ratios and operation conditions were investigated, and the microbial community structure of the SBMBR system was analyzed by using PCR-DGGE technology. The results showed that SBMBR had a high removal efficiency on pollutants in acrylic fiber wastewater, and the lacking of carbon source and alkalinity were the main limiting factors for nitrogen removal. Under the designed operation conditions of 90 min anoxic/150 min aerobic cyclic operation and HRT of 24 h, the average COD, NH4(+) -N and TN removal efficiencies were 82.5%, 98.7% and 74.6%, respectively. The effluent of the SBMBR could steadily meet the Grade I standards of the Wastewater Comprehensive Discharge Standard of China (GB 8978-1996). The PCR-DGGE analyses showed that the microbial communities in SBMBR had a significant shift with the changes of influent characteristics and operation conditions. By cloning and sequencing analyses of selected dominant bacteria, 22 16S rDNA sequence were successfully identified from 9 sludge samples, from which 7 dominant functional microorganisms for the degradation of organic pollutants in acrylic fiber wastewater were screened out.
authors.forename: Jian
authors.initials: J
authors.lastname: Wei
authors.forename: Yong-Huil
authors.initials: YH
authors.lastname: Song
authors.forename: Le
authors.initials: L
authors.lastname: Zhao
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000737:chemistry; D002681:China; D009584:Nitrogen / Q000737:chemistry; D012722:Sewage / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D002244:Carbon; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater