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Application of a Membrane-Immobilized Biofilm System to Perchlorate Contaminated Drinking Water 膜固定化生物膜系统在高氯酸盐污染饮用水中的应用
发布日期: 2001-06-01
本研究考察了从水中去除高氯酸盐的生物处理系统,在该系统中,高氯酸盐降解微生物与通过微孔膜处理的水进行物理分离,从而将成品水的潜在微生物污染降至最低。该过程仅基于扩散,无需在膜上保持压差。在本研究中,从废水处理厂浓缩了高氯酸盐还原混合培养物。结果表明,高氯酸盐在膜中的扩散系数明显小于高氯酸盐在水中的扩散系数。使用固定化生物膜进行的生物降解试验表明,高氯酸盐具有良好的生物降解性。发现高氯酸盐与氯化物的比率约为1,表明反应器设计具有良好的可靠性。 研究了硝酸盐和总溶解固体(盐度为NaCl)的干扰,结果表明,高硝酸盐和盐度水平会对高氯酸盐的生物降解产生负面影响。包括16个参考文献、表格和图表。
This research examined a biological treatment system to remove perchlorate from waters, in which the perchlorate-degrading microorganisms are physically separated from the water being treated by a microporous membrane, thus minimizing potential microbial contamination of the finished water. The process is solely based on diffusion and maintaining a pressure difference across the membrane is not necessary. A perchlorate-reducing mixed culture was enriched from a wastewater treatment plant for this study. The results show that the diffusion coefficient of perchlorate through the membrane is significantly smaller than that of perchlorate in water. Biodegradation testing using immobilized biofilms has shown excellent perchlorate biodegradation. The perchlorate to chloride ratio, was found to be about one, indicating good reliability of the reactor design. The interference of nitrate and total dissolved solids (salinity as NaCl) has been investigated and the results show that high nitrate and salinity levels negatively impact perchlorate biodegradation. Includes 16 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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