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Treating carbon-limited wastewater by DWTR and woodchip augmented floating constructed wetlands

文献类型： 外文期刊

作者： Shen, Cheng 1 ; Zhao, Yaqian 3 ; Li, Yan 4 ; Liu, Ranbin 2 ; Wang, Jie 1 ; Yang, Yan 2 ;

作者机构： 1.Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Zhejiang Prov Key Lab Recycling & Ecotreatment Wa, Hangzhou 310000, Zhejiang, Peoples R China

2.Univ Coll Dublin, Dooge Ctr Water Resources Res, Sch Civil Engn, Dublin 4, Ireland

3.Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian 710048, Peoples R China

4.Zhejiang Acad Agr Sci, Inst Environm Resource & Soil Fertilizer, Hangzhou 310000, Zhejiang, Peoples R China

5.Beijing Univ Civil Engn & Architecture, Sino Dutch R&D Ctr Future Wastewater Treatment Te, Beijing Adv Innovat Ctr Future Urban Design, Beijing 100044, Peoples R China

关键词： Constructed floating wetland (FCW); Carbon-limited wastewater; Low temperature; Nitrogen removal; Phosphorus fate

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2021 年 285 卷

页码：

收录情况： SCI

摘要： Floating constructed wetlands (FCWs) have attained tremendous popularity for water purification purposes. However, FCW functions establishment in nutrients removal from carbon-limited wastewater, especially in cold weather, is still a challenge. Here, two drinking water treatment residual (DWTR) based biocarriers (B-I: DWTR cakes, B-II: DWTR cakes combined with woodchips) have been augmented into FCW to enhance the nutrients (N and P) removal performance. Compared to the traditional FCW, the intensified FCWs simultaneously achieved higher N and P removal efficiencies, with average pollutants removal of 52.16 +/- 11.51% for TN and 92.72 +/- 1.61% for TP in FCW-I and 57.65 +/- 9.43% for TN and 92.17 +/- 2.55% for TP in FCW-II, respectively, while their removal in FCW-III of 27.74 +/- 7.11% for TN and 17.91 +/- 9.27% for TP. B-II performed best in overcoming the negative influence of low temperature in nutrients removal. Mass balance budget indicated that most P was enriched in DWTR based biocarriers. Thus it is feasible to recycle and recover P from the surface water. Furthermore, P in the sediment can be changed from active P to stable P, mitigating the internal P release risk. This study can help to expand the understanding of the intensified FCWs and promote the practical application of FCWs.

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