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环境科学 2003
Filtration Capability of the Bio-Dynamic Membrane
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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.
