投加饮用水处理厂剩余污泥强化湖泊沉积物中厌氧氨氧化。
Enhancement of anaerobic ammonium oxidation in lake sediment by applying drinking water treatment residuals.
机构信息
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
出版信息
Bioresour Technol. 2013 Aug;142:745-9. doi: 10.1016/j.biortech.2013.06.016. Epub 2013 Jun 13.
In this study, the effect of drinking water treatment residuals (WTRs), non-hazardous byproducts from drinking water treatment plants, on anaerobic ammonium oxidation (anammox) in lake sediments were investigated, qualitatively and quantitatively based on enrichment tests. The results suggested that after the enrichment, anammox were strengthened significantly in enriched sediments with no WTRs (ESNW) and with WTRs (ESW). Comparatively, anammox bacteria in ESW were more aggregated than ESNW. The activity (9.2 nmol g(-1)h(-1)) and abundance (9.8×10(7)copies g(-1)) of anammox bacteria in ESW were also higher than ESNW (6.1 nmol g(-1)h(-1)and 8.9×10(7) copies g(-1)). Further analysis suggested that after enrichment, anammox bacteria in sediments were phylogenetically more distant from Candidatus Kuenenia; anammox bacteria in ESW were closely related to Candidatus Brocadia. Overall, WTRs promoted aggregation, strengthened activity and increased abundance of anammox bacteria in lake sediments. Therefore, WTRs can enhance anammox in lake sediments.
在这项研究中，我们基于富集实验，定性和定量地研究了饮用水处理厂的非危险副产物——饮用水处理残渣（WTR）对湖泊沉积物中厌氧氨氧化（anammox）的影响。结果表明，在未添加 WTR 的富集沉积物（ESNW）和添加 WTR 的富集沉积物（ESW）中，anammox 得到了明显的强化。相比之下，ESW 中的 anammox 细菌比 ESNW 更加聚集。ESW 中的 anammox 细菌的活性（9.2 nmol g(-1)h(-1)）和丰度（9.8×10(7)copies g(-1)）也高于 ESNW（6.1 nmol g(-1)h(-1)和 8.9×10(7) copies g(-1)）。进一步的分析表明，在富集之后，沉积物中的 anammox 细菌与 Candidatus Kuenenia 的系统发育关系更加疏远；ESW 中的 anammox 细菌与 Candidatus Brocadia 密切相关。总的来说，WTR 促进了湖泊沉积物中 anammox 细菌的聚集、增强了其活性并增加了其丰度。因此，WTR 可以增强湖泊沉积物中的 anammox 反应。
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