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This present research mainly use inorganic particles in nonwoven membrane bioreactor. The fouling of the inorganic particles in the membrane to the flux is discussed, as well as the filtering effect of inorganic particles to nonwovens. Nonwovens is a novel membrane material which MBR uses. The nonwovens used in the present research has an average aperture 30 μm, which is larger than the traditional membrane material (MF, UF). The inorganic particles selects titanium dioxide particles, they have three kinds of particle size, i.e.,0.2-0.4 μm, 1.0-2.0 μm, 42 μm. To carries on the inorganic particles filters before the experiment, first to the clear water carries on the clear water flux experiment which nonwovens. The inorganic particles filtering experiment is divided into three stages: The first stage is changes the titanium dioxide particles size; in the second stage the initia Hydraulic Retention Time is changed; in the third stage the aeration intensity is varied. In every stage of the experiment, we discovered that the flux all can reach stable condition during the operating time, certainly not obvious reduction, by initial Hydraulic Retention time 2 hours operations when reduces 8.84% for to be most; when the aeration intensity is 8.0 L min-1 reduces 0.19% for to be least. By SS and the particle size analysis, the particle size is 42 μm titanium dioxide is easily nonwoven to filter, in the operating time 8 hours namely can by membrane complete filtering. Through SEM we discovered that the membrane cannot effectively filter those with smaller and single size particless, but is broad when the particle size scope, particle size smaller particles besides adsorption in membrane fiber, also adsorbs in the particle size big particles and is sieved by the big inter-particless hole filters.
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