title: [Filtration capability of the bio-dynamic membrane].
abstract: The filter modules made of common mesh material were submerged in to a bioreactor to form a dynamic-membrane bioreactor. This paper studied the filtration capability of the dynamic bio-membrane forming on 100-micron Dacron mesh material. The outstanding solid-liquid separation capability of the dynamic bio-membrane was mainly contributed to the gel-layer attaching on the mesh material. The dynamic bio-membrane could checked 30%-60% TOC of various molecule weights ranging < 3000 to > 10(5), whereas its separation accuracy was not high enough to intercept all the organics of molecules weights larger than 10(5). The tap water filtration resistance of the dynamic bio-membrane sheet with gel-layer attaching on was about 1.9 x 10(9) m-1, which almost equaled to that of the untapped sheet. The resistance caused by cake-layer contributed about 70% to the total filtration resistance of the dynamic bio-membrane on working. The untapped dynamic bio-membrane sheet showed an initial resistance to tap water permeation, but the one with gel-layer attaching on had little initial resistance. The reason might be that the gel-layer eliminated the hydrophobicity of the mesh material.
authors.affiliation: Dept. of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Fan
authors.forename: Xia
authors.initials: X
authors.lastname: Huang
authors.forename: Xianghua
authors.initials: X
authors.lastname: Wen
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
mesh_terms: D019149:Bioreactors; D005374:Filtration; D008567:Membranes, Artificial; D010539:Permeability; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D008567:Membranes, Artificial