Abundance and diversity of ammonia-oxidizing archaea and bacteria on biological activated carbon in a pilot-scale drinking water treatment plant with different treatment processes.
Abundance and diversity of ammonia-oxidizing archaea and bacteria on biological activated carbon in a pilot-scale drinking water treatment plant with different treatment processes.
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DOI：
10.2166/wst.2010.204
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
I. Kasuga;Hirotaka Nakagaki;F. Kurisu;H. Furumai
中科院分区：
文献类型：
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作者：
I. Kasuga;Hirotaka Nakagaki;F. Kurisu;H. Furumai
在中试规模的工厂中评估了不同位置的快速砂滤对 BAC 处理硝化性能的影响。在该工厂中，在工艺(A)中，快速砂滤置于臭氧化-BAC处理之后，而在工艺(B)中，快速砂滤置于臭氧化-BAC处理之前。对氨氧化古菌（AOA）和细菌（AOB）的amoA基因进行分析并结合硝化电位测试。过程 (A) 中的 BAC 在每次采样时都表现出稍高的硝化潜力。这可能是由于来自过程 (A) 的 BAC 上的 AOB 丰度高于来自过程 (B) 的 BAC 上的 AOB。然而，无论快速砂滤的位置如何，AOA 而不是 AOB 可能是 BAC 处理中主要的氨氧化剂。 2 月份，当检测到 AOA-amoA 和 AOB-amoA 基因丰度最高时，两个过程中的 BAC 硝化潜力均达到最高。由于工艺(A)中BAC处理后设置了快速砂滤，因此工艺(A)中BAC进水中的残留铝浓度较高。然而，没有观察到铝对硝化活性的不利影响。这些结果表明，不同处理过程中铝浓度以外的因素可能对 BAC 上氨氧化微生物的丰度产生一定影响。
The effects of different placements of rapid sand filtration on nitrification performance of BAC treatment in a pilot-scale plant were evaluated. In this plant, rapid sand filtration was placed after ozonation-BAC treatment in Process (A), while it preceded ozonation-BAC treatment in Process (B). Analysis of amoA genes of ammonia-oxidizing archaea (AOA) and bacteria (AOB) combined with nitrification potential test was conducted. BAC from Process (A) demonstrated slightly higher nitrification potential at every sampling occasion. This might be due to higher abundances of AOB on BAC from Process (A) than those on BAC from Process (B). However, AOA rather than AOB could be predominant ammonia-oxidizers in BAC treatment regardless of the position of rapid sand filtration. The highest nitrification potential was observed for BAC from both processes in February when the highest abundances of AOA-amoA and AOB-amoA genes were detected. Since rapid sand filtration was placed after BAC treatment in Process (A), residual aluminum concentration in BAC influent was higher in Process (A). However, adverse effects of aluminum on nitrification activity were not observed. These results suggest that factors other than aluminum concentration in different treatment processes could possibly have some influence on abundances of ammonia-oxidizing microorganisms on BAC.