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Impact of Biomass Concentrations on the Removal of Earthy/Musty Odor Compounds from Drinking Water by Biological Filtration 生物量浓度对生物过滤去除饮用水中泥土/霉味化合物的影响
发布日期: 2004-11-15
本研究评估了在典型环境中生物处理的效率 可生物降解臭氧氧化副产物及其在去除或最小化过程中的缺失 土工蛋白和MIB的浓度。实验室规模的实验使用了四种平行方法 生物过滤塔,其中两个塔含有耗尽的颗粒活性炭(GAC) 介质和沙子,两个柱子上有新鲜的无烟煤和沙子。水源包括 加入geosmin和MIB的脱氯自来水,以及一种容易稀释的鸡尾酒 可生物降解有机物(BOM,即典型的臭氧氧化副产品)。第一阶段实验 调查高BOM水平(280 mg/L),以模拟已暴露的水 在过滤之前进行臭氧氧化,而第二阶段的实验使用了较低的BOM水平(28 mg/L)来 模拟未经臭氧处理的水。数据分析表明,这些气味的去除率 在含有GAC的色谱柱中,I相和II相的化合物都明显较高 媒体这两种气味化合物的去除率在模拟的两种环境中都有可比性 使用GAC介质时,臭氧水和非臭氧水。地球敏化率 在模拟上游臭氧氧化的情况下,这些色谱柱中的去除率在55-70%之间 47岁之间- 上游没有臭氧的地方有69%。这些系统中的MIB清除百分比 模拟上游臭氧氧化的色谱柱范围在23-49%之间,29-40%之间 没有上游臭氧氧化的地方。对于无烟煤介质,去除两种气味 当没有模拟上游臭氧氧化时,化合物的含量显著降低。 过滤器中的生物量水平似乎对这两种污染物的去除效率都有重大影响 气味化合物。包括17个参考文献、图表。
This research evaluated the efficiency of biological treatment in the presence of typical easily biodegradable ozonation byproducts and in their absence in removing or minimizing concentrations of geosmin and MIB. Bench scale experiments were conducted using four parallel biofilter columns in which two columns contained exhausted granular activated carbon (GAC) media and sand, and two columns contained fresh anthracite and sand. Source water consisted of dechlorinated tap water to which geosmin and MIB were added, as well as a cocktail of easily biodegradable organic matter (BOM, i.e. typical ozonation byproducts). Phase I experiments investigated a high BOM level (280 mg/L) in order to simulate water that had been subjected to ozonation prior to filtration, while Phase II experiments used a low BOM level (28 mg/L) to simulate a non-ozonated water. Analysis of the data showed that percent removals of these odor compounds in both Phases I and II were measurably higher in the columns containing the GAC media. Comparable removals of both odor compounds were observed between the simulated ozonated water and the non-ozonated water when GAC media was used. Geosmin percent removals in these columns ranged between 55-70% where upstream ozonation was simulated and between 47-69% where there was no upstream ozonation. MIB percent removals in these columns ranged between 23-49% where upstream ozonation was simulated and between 29-40% where there was no upstream ozonation. In the case of anthracite media, removals of both odor compounds were substantially lower when there was no simulation of upstream ozonation. Biomass levels in the filters appeared to have a major impact on the removal efficiencies of both odor compounds. Includes 17 references, 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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