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Journal AWWA - Reduction of Bromate in a BAC Filter AWWA期刊-BAC过滤器中溴酸盐的还原
发布日期: 1999-08-01
在生物活性炭(BAC)过滤过程中观察到溴酸盐的去除。BAC中的微生物将溴酸盐还原为溴酸盐,尽管可能形成其他中间物种。考察了溶解氧(D0)浓度、硝酸盐浓度和空床接触时间(EBCT)对微生物溴酸盐还原的影响。常见的微生物电子受体氧和硝酸盐阻碍了溴酸盐的还原。例如,在BAC过滤器中,当进水DO浓度为2 mg/L时,使用25- 在EBCT中,当进水硝酸盐浓度为0.2 mg/L时,溴酸盐减少了86%,而当进水硝酸盐浓度为5.1 mg/L时,溴酸盐减少了76%。一般来说,延长EBCT会增加溴酸盐的去除。如果BAC过滤器中的DO浓度得到控制,常规臭氧颗粒活性炭装置中的生物溴酸盐去除被认为是可能的。包括23个参考文献、表格和图表。
Bromate removal was observed during biologically active carbon (BAC) filtration. Microorganisms in the BAC reduced bromate to bromide, although the formation of other intermediate species is possible. The effects of dissolved oxygen (D0) concentration, nitrate concentration, and empty bed contact time (EBCT) on microbial bromate reduction were examined. Oxygen and nitrate, common microbial electron acceptors, hindered bromate reduction. For example, at an influent DO concentration of 2 mg/L in a BAC filter with a 25-min EBCT, bromate was reduced by 86 percent at an influent nitrate concentration of 0.2 mg/L, whereas it was reduced by 76 percent at an influent nitrate concentration of 5.1 mg/L. In general, lengthening the EBCT increased bromate removal. Biological bromate removal in a conventional ozone-granular activated carbon plant was deemed possible if the DO concentration in the BAC filter is controlled. Includes 23 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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