| 倒置A2/O-MBR组合工艺处理生活污水效能及膜污染特性 |
| 摘要点击 1765 全文点击 1064 投稿时间：2015-04-08 修订日期：2015-05-29 |
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| 中文关键词 PVA 倒置 A2/O-MBR 回流比 膜污染 生活污水 |
| 英文关键词 PVA reversed A2/O-MBR reflux ratio membrane fouling domestic sewage |
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| 中文摘要 |
| 将自制高强度 PVA亲水化改性复合膜应用于倒置A2/O-MBR工艺中,处理模拟生活污水,考察了系统对 COD、氨氮、总氮、总磷及浊度的去除效果以及膜性能的变化. 结果表明,在不同回流比条件下, COD、氨氮、总磷等去除率变化不大,分别大于 90%、95%、80%;回流比对总氮的去除效果有一定的影响,回流比为 100%时去除率较低,当回流比从 100%增加到 300%时,去除率相应增大,在膜的高效截留作用下,膜出水浊度始终小于 0.05NTU,控制膜通量为(12±0.5)L·(m2·h)-1,连续运行 52 d,未对膜进行任何清洗,膜污染平均速率为 13.22 Pa·h-1,膜污染进程缓慢. 经FTIR分析,多糖和蛋白质是膜有机污染物的主要成分,多为亲水性物质. 膜与污染物之间的微观作用力的测定表明LB为膜主要污染物,与FTIR分析一致. |
| 英文摘要 |
| The hydrophilic modificatiion of PVA composite membrane was applied in the reversed A2/O-MBR process to treat wastewater, the removal efficacy of COD, NH4+-N, TN, TP, turbidity and performance of composite membrane were investigated.The results indicate that the average removal rates of COD, NH4+-N and TP were higher than 90%,95% and 80% under different reflux ratio, respectively.The reflux ratio had large impact on TN removal rate: when the reflux ratio was 100%, the removal rate was low;when the reflux ratio increases the range from 100% to 300%, the removal rate was correspondingly increased.Under the efficient interception of membrane, water turbidity was always less than 0.05NTU, and the composite film was controlled at (12±0.5)L·(m2·h)-1 flux, the operation was uninterrupted for 52 days without any cleaning process of the membrane, the average rate of membrane fouling is 13.22 Pa·h-1 and the process of membrane fouling was very slow.After FTIR analysis, we confirmed that polysaccharide and protein is a main composition of organic pollutants.LB is further proved to be the main pollutants from micro acting force between the membrane and the pollutants, which is consistent with FTIR analysis. |
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