| 膜-生物反应器处理高盐废水膜面污染物特性研究 |
| 摘要点击 3172 全文点击 1334 投稿时间：2013-05-10 修订日期：2013-08-24 |
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| 中文关键词 膜-生物反应器 平板膜 膜污染 高盐废水 污水处理 |
| 英文关键词 membrane bioreactor (MBR) flat-membrane membrane foulants high-salinity wastewater wastewater treatment |
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| 中文摘要 |
| 研究MBR在低有机负荷条件下处理高盐废水的膜面污染物特征. 结果表明，稳定运行121 d后，MBR对有机物和NH4+-N去除率稳定，出水效果良好；污泥性质发生较大变化，挥发性固体含量（VSS）/固体含量（SS）的下降，污泥体积指数（SVI）下降，表明污泥中无机成分含量增加，絮体更为紧密，沉降性能变好；污泥溶解性微生物产物（SMP）和胞外聚合物（EPS）成分发生较大变化，蛋白质所占比例降低，腐殖酸所占比例增加；扫描电子显微镜-X射线能谱仪（SEM-EDX）结果表明膜面存在无机污染物，其主要组成元素为Na、Al、Mg、Ca、K、Fe、Ti、Cr、W、Si和Cl；凝胶过滤色谱（GFC）分析表明，SMP中的大分子有机物被膜截留并累积是形成膜污染的原因之一；傅立叶红外（FTIR）光谱和三维荧光光谱（EEM）分析表明，膜面有机污染物的主要成分为糖类、蛋白质和腐殖酸；膜污染物组分质量分析说明在处理高盐废水时无机膜污染不可忽略. |
| 英文摘要 |
| The properties of membrane foulants in MBR treating high-salinity wastewater were studied. Results showed that the removal efficiency of organics and NH4+-N was stable and high-quality effluent was obtained after the operation time of 121 d; the ratio of VSS/SS decreased and SVI declined at the same time, indicating that the inorganic content of sludge increased which might lead to more compact flocs and higher settling ability; SMP and EPS of the sludge were largely changed with a lower proportion of protein and a higher proportion of humic acid. Scanning electron microscope-energy diffusive X-ray analyzer (SEM-EDX) demonstrated that Na, Al, Mg, Ca, K, Fe, Ti, Cr, W, Si and Cl were the major inorganic elements in membrane foulants; Gel filtration chromatography (GFC)illustrated that there were organic matters with high molecular weight trapped by membrane and formed the membrane foulants; Fourier transform infrared (FTIR) spectroscopy and Excitation emission matrix (EEM) fluoresce spectroscopy discovered that carbohydrates, protein and humic acid were the main content of organics in membrane foulants.; quantitative analysis of membrane foulants showed that the amount of inorganic membrane foulants were significant when treating high-salinity wastewater. |
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