title: [Effect of activated sludge properties on short-term membrane fouling in submerged membrane bioreactor based on statistical analysis].
abstract: The influence of activated sludge properties on membrane fouling was investigated using statistical method. The results show that extracelluler polymeric substances (EPS), soluble microbial products (SMP), suspended solids in the supernatant (SSs), dynamic viscosity (micro), relative hydrophobicity (RH) and Zeta potential all have a significant influence on membrane permeability during microfiltration of activated sludge wastewater. The pearson's correlation coefficient (r(p)) for linear correlations between membrane fouling resistance and these sludge properties are 0.898, 0.712, 0.810, 0.691, 0.837, -0.881, respectively. The statistical results also show that SMP, micro, SSs, Zeta potential, and RH are mostly determined by EPS, indicating that EPS is the main and essential factor affecting membrane fouling in activated sludge properties. The pearson's correlation coefficient (r(p)) for linear correlations between total EPS and other sludge properties are 0.682, 0.633, 0.783, -0.953, 0.877, respectively. EPS should be controlled in the operation of membrane bioreactor to achieve a suitable permeation.
authors.affiliation: School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Fan-gang
authors.initials: FG
authors.lastname: Meng
authors.forename: Han-min
authors.initials: HM
authors.lastname: Zhang
authors.forename: Lian-sheng
authors.initials: LS
authors.lastname: Yu
authors.forename: Feng-lin
authors.initials: FL
authors.lastname: Yang
authors.forename: Yan-song
authors.initials: YS
authors.lastname: Li
authors.forename: Xing-wen
authors.initials: XW
authors.lastname: Zhang
mesh_terms: D000465:Algorithms; D001704:Biopolymers / Q000737:chemistry; D019149:Bioreactors; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation / Q000379:methods; D008567:Membranes, Artificial; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*
chemical_list: D001704:Biopolymers; D008567:Membranes, Artificial; D012722:Sewage