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Effects of Oenanthe javanica on Nitrogen Removal in Free-Water Surface Constructed Wetlands under Low-Temperature Conditions

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Listed:
  • Siyuan Song

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China
    Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China
    Siyuan Song and Penghe Wang are co-first authors.)

  • Penghe Wang

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China
    Shanghai Investigation, Design & Research Institute Co., Ltd. (SIDRI), Shanghai 200434, China
    Siyuan Song and Penghe Wang are co-first authors.)

  • Yongxia Liu

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China)

  • Dehua Zhao

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China
    Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China)

  • Xin Leng

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China
    Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China)

  • Shuqing An

    (Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China
    Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China)

Abstract

To investigate the role and microorganism-related mechanisms of macrophytes and assess the feasibility of Oenanthe javanica (Blume) DC. in promoting nitrogen removal in free-water surface constructed wetlands (FWS-CWS) under low temperatures (<10 °C), pilot-scale FWS-CWS, planted with O. javanica , were set up and run for batch wastewater treatment in eastern China during winter. The presence of macrophytes observably improved the removal rates of ammonia nitrogen (65%–71%) and total nitrogen (41%–48%) ( p < 0.05), with a sharp increase in chemical oxygen demand concentrations (about 3–4 times). Compared to the unplanted systems, the planted systems not only exhibited higher richness and diversity of microorganisms, but also significantly higher abundances of bacteria, ammonia monooxygenase gene (amoA), nitrous oxide reductase gene (nosZ), dissimilatory cd1-containing nitrite reductase gene (nirS), and dissimilatory copper-containing nitrite reductase gene (nirK) in the substrate. Meanwhile, the analysis of the microbial community composition further revealed significant differences. The results indicate that enhanced abundances of microorganisms, and the key functional genes involved with nitrogen metabolism in the planted systems played critical roles in nitrogen removal from wastewater in FWS-CWS. Furthermore, abundant carbon release from the wetland macrophytes could potentially aid nitrogen removal in FWS-CWS during winter.

Suggested Citation

  • Siyuan Song & Penghe Wang & Yongxia Liu & Dehua Zhao & Xin Leng & Shuqing An, 2019. "Effects of Oenanthe javanica on Nitrogen Removal in Free-Water Surface Constructed Wetlands under Low-Temperature Conditions," IJERPH, MDPI, vol. 16(8), pages 1-19, April.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:8:p:1420-:d:224542
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    Citations

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    Cited by:

    1. Linhe Sun & Huijun Zhao & Jixiang Liu & Bei Li & Yajun Chang & Dongrui Yao, 2021. "A New Green Model for the Bioremediation and Resource Utilization of Livestock Wastewater," IJERPH, MDPI, vol. 18(16), pages 1-13, August.
    2. Yanjie Zhang & Weiyang Dong & Guokai Yan & Haiyan Wang & Huan Wang & Yang Chang & Shan Yu & Zhaosheng Chu & Yu Ling & Congyu Li, 2022. "Plant Carbon Sources for Denitrification Enhancement and Its Mechanism in Constructed Wetlands: A Review," Sustainability, MDPI, vol. 14(19), pages 1-23, October.
    3. Linhe Sun & Wei Wang & Fengjun Liu & Jixiang Liu & Fengfeng Du & Xiaojing Liu & Yajun Chang & Dongrui Yao, 2022. "Differences in Nitrogen and Phosphorus Removal under Different Temperatures in Oenanthe javanica Cultivars," Agriculture, MDPI, vol. 12(10), pages 1-15, October.

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