| 微网生物动态膜过滤性能的研究 |
| 摘要点击 1844 全文点击 2057 投稿时间：2002-01-16 修订日期：2002-05-08 |
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| 中文关键词 生物动态膜 有机物截留 分子量分布 过滤阻力 |
| 英文关键词 bio-dynamic membrane rejection to organics molecule weight distribution filtration resistance |
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| 中文摘要 |
| 采用普通微网材料加工的过滤组件与生物反应器一起构成动态膜-生物反应器,研究了微网上所形成的生物动态膜的过滤性能.生物动态膜所具有的较强截留能力主要是由附着的凝胶层产生.动态膜对相对分子质量＜3×103至＞1×105的各个级别的溶解性有机物都有30%～60%的截留率,但过滤的精度并不很高,不能完全截留相对分子质量大于1×105的溶解性有机物.已经覆盖有凝胶层的膜片与未使用过的新膜片的清水过滤阻力几乎相等,约为1.9×109m-1.由滤饼产生的过滤阻力占运行中动态膜片总过滤阻力的绝大部分.新膜片在清水通过时有明显的初始阻力,而有凝胶层覆盖时的膜片几乎没有初始过滤阻力. |
| 英文摘要 |
| 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 >105,whereas its separation accuracy was not high enough to intercept all the organics of molecules weights larger than 105. The tap water filtration resistance of the dynamic bio-membrane sheet with gel-layer attaching on was about 1.9×109 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 |
