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Li Pengyu, Wang Zhen, Yuan Linjiang, Dong Jian, Liu Lin, Zhu Gefu, Liu Chaoxiang. Comparison of two different constructed wetland systems to treat swine wastewater[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1341-1345.
Citation: Li Pengyu, Wang Zhen, Yuan Linjiang, Dong Jian, Liu Lin, Zhu Gefu, Liu Chaoxiang. Comparison of two different constructed wetland systems to treat swine wastewater[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1341-1345.
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Comparison of two different constructed wetland systems to treat swine wastewater

  • 1.

    School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

  • 2.

    Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

  • 3.

    Graduate University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 25/03/2012
    Accepted Date: 25/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Comparative study of two different types of constructed wetlands for swine wastewater treatment was carried out. The results showed that, there was a significant gap in the treatment effects between horizontal subsurface flow constructed wetland (HSSF) and vertical subsurface flow constructed wetland (VSSF) due to their inherent difference in inflow modes and hydraulic flow state. As the hydraulic loading rate was 0.02 m3/(m2·d), average removal efficiencies of HSSF and VSSF were as follows: 93.18% and 93.10% for COD, 53.44% and 81.43% for TN, 52.64% and 84.62% for ammonium nitrogen, 88.41% and 95.71% for TP, respectively. It was considered that all the medium in the VSSF could be fully utilized, and its ability of oxygen supplement could be strengthened. In addition, aerobic zone, anoxic zone and anaerobic zone could coexist so that nitrogen removal rate was improved by nitrification and denitrification in VSSF. Furthermore, removal rates of other pollutants were also improved simultaneously. It was implied that VSSF was more effective for treating livestock wastewater.
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Comparison of two different constructed wetland systems to treat swine wastewater

  • Received Date: 25/03/2012
  • Accepted Date: 25/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: Comparative study of two different types of constructed wetlands for swine wastewater treatment was carried out. The results showed that, there was a significant gap in the treatment effects between horizontal subsurface flow constructed wetland (HSSF) and vertical subsurface flow constructed wetland (VSSF) due to their inherent difference in inflow modes and hydraulic flow state. As the hydraulic loading rate was 0.02 m3/(m2·d), average removal efficiencies of HSSF and VSSF were as follows: 93.18% and 93.10% for COD, 53.44% and 81.43% for TN, 52.64% and 84.62% for ammonium nitrogen, 88.41% and 95.71% for TP, respectively. It was considered that all the medium in the VSSF could be fully utilized, and its ability of oxygen supplement could be strengthened. In addition, aerobic zone, anoxic zone and anaerobic zone could coexist so that nitrogen removal rate was improved by nitrification and denitrification in VSSF. Furthermore, removal rates of other pollutants were also improved simultaneously. It was implied that VSSF was more effective for treating livestock wastewater.

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