title: [Efficacy of A2/O-MBR Combined Process in Wastewater Treatment and the Characteristics of Membrane Fouling].
abstract: The hydrophilic modification of PVA composite membrane was applied in the reversed A2/O-MBR process to treat wastewater, the removal efficacy of COD, NH4(+) -N, TN, TP, turbidity and performance of composite membrane were investigated. The results indicate that the average removal rates of COD, NH4(+) -N and TP were higher than 90%, 95% and 80% under different reflux ratio, respectively. The reflux ratio had large impact on TN removal rate: when the reflux ratio was 100%, the removal rate was low; when the reflux ratio increases the range from 100% to 300%, the removal rate was correspondingly increased. Under the efficient interception of membrane, water turbidity was always less than 0.05NTU, and the composite film was controlled at (12 ± 0.5) L x (m2 x h)(-1) flux, the operation was uninterrupted for 52 days without any cleaning process of the membrane, the average rate of membrane fouling is 13.22 Pa x h(-1) and the process of membrane fouling was very slow. After FTIR analysis, we confirmed that polysaccharide and protein is a main composition of organic pollutants. LB is further proved to be the main pollutants from micro acting force between the membrane and the pollutants, which is consistent with FTIR analysis.
authors: Xu-dong
authors: XD
authors: Wang
authors: Ya-bin
authors: YB
authors: Ma
authors: Lei
authors: L
authors: Wang
authors: Yi-ting
authors: YT
authors: Yang
authors: Dan-xi
authors: DX
authors: Huang
authors: Si-qing
authors: SQ
authors: Xia
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis; D008567:Membranes, Artificial; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D064751:Ammonium Compounds; D008567:Membranes, Artificial; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater; D014874:Water Pollutants, Chemical