| 动态膜-生物反应器对城市污水的处理 |
| 摘要点击 3542 全文点击 3171 投稿时间：2001-11-22 修订日期：2002-01-18 |
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| 中文关键词 动态膜 膜过滤 膜-生物反应器 城市污水 |
| 英文关键词 dynamic membrane membrane filtration membrane bioreactor urban wastewater. |
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| 中文摘要 |
| 应用动态膜原理,以0.1mm孔径的普通筛网代替固定膜材料构成一体式动态膜-生物反应器(DMBR)处理实际城市污水.HRT＝3.5h时,出水水质良好.DMBR在小于数cm的液位差下自流出水,出水中的SS最高检测值为4.05mg/L,但在多数情况下为0.在MLSS约7000～8000mg/L下,当动态膜通量为14.9L/(m2·h)时,出水水头仅为5.8mm;27d连续运行,出水水头没有明显改变.动态膜对反应器上清液中的COD和TOC的平均去除率分别为28.74%和36.9%.当溶解氧浓度大于2～3mg/L时,氨氮去除率大于96%. |
| 英文摘要 |
| The dynamic membrane forming on the surface of 0.1mm Dacron mesh was utilized instead of static membrane, e.g. hollow fiber membrane, to develop a submerged dynamic membrane bioreactor (DMBR). The DMBR had high quality effluents when treating domestic wastewater at HRT=3.5h. The dynamic membrane could work steadily at a pressure no more than several centimeters water head drop. The highest SS concentration in the effluents was 4.05mg/L, whereas the measured SS concentrations were zero in most circumstances. At condition of MLSS=7000～8000mg/L, the effluent head drop was only 5.8mm when flux=14.9L/(m2·h), and it had little change during a continuous run for 27 days. The dynamic membrane averagely removed 28.74% of COD and 36.9% of TOC in the supernatant of the mixed liquor. The DMBR could remove NH3-N more than 96% when DO in the mixed liquor was no less than 2～3mg/L. |
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