Performance of various fillers in ecological floating beds planted with Myriophyllum aquaticum treating municipal wastewater

文献类型： 外文期刊

第一作者： Kumwimba, Mathieu Nsenga

作者： Kumwimba, Mathieu Nsenga;Li, Xuyong;Huang, Jinlou;Kumwimba, Mathieu Nsenga;Li, Xuyong;Huang, Jinlou;Kumwimba, Mathieu Nsenga;Muyembe, Diana Kavidia;Dzakpasu, Mawuli;Sanganyado, Edmond

作者机构：

关键词： Ecological floating beds; Suspended fillers; Advanced purification; Nutrient; Microbial community

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 842 卷

页码：

收录情况： SCI

摘要： The performance of different suspended fillers (zeolite, drinking water treatment residual, biochar, woodchip and stereo-elastic packing) and their combinations in treating municipal wastewater in ecological floating beds (Eco-FBs) planted with Myriophyllum aquaticum was assessed. Six sets of enhanced Eco-FBs were developed to assess the individual and synergistic effects of combinations of the various fillers and microorganisms on nutrient elimination. The results demonstrated mean TN, NH4-N, TP and COD purification efficiencies of 99.2 +/- 11.2 %, 99.82 +/- 16.4 %, 98.3 +/- 14.3 %, and 96.1 +/- 12.3 %, respectively in the Eco-FBs strengthened with all five fillers. The corresponding purification rates were 0.89 +/- 0.14, 0.75 +/- 0.12, 0.08 +/- 0.016, and 7.05 +/- 1.09 g m(-2) d(-1), which were 2-3 times higher than those of the conventional Eco-FB system. High-throughput sequencing showed that some genera related to nutrient transformation, including Proteobacteria (24.13-51.95 %), followed by Chloroflexi (5.64-25.01 %), Planctomycetes (8.48-14.43 %) and Acidobacteria (2.29-11.65 %), were abundantly enriched in the strengthened Eco-FBs. Enhancement of the Eco-FBs with various fillers significantly increased microbial species richness and diversity as demonstrated by Chao1, Shannon and Simpson's indexes, particularly when all the five fillers were combined. Therefore, introducing suspended fillers into Eco-FBs is an appropriate approach for improving nutrient elimination from municipal wastewater.

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