ROLE AND DESIGN PRINCIPLES OF SUBSTRATE FOR WASEWATER PURIFICATION IN SUBSURFACE FLOW CONSTRUCTED WETLAND

ZHAO Qian; ZHUANG Lin-lan; SHENG Qin; ZHANG Jian

doi:10.13205/j.hjgc.202109003

Volume 39 Issue 9

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(9): 14-22

ZHAO Qian, ZHUANG Lin-lan, SHENG Qin, ZHANG Jian. ROLE AND DESIGN PRINCIPLES OF SUBSTRATE FOR WASEWATER PURIFICATION IN SUBSURFACE FLOW CONSTRUCTED WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 14-22. doi: 10.13205/j.hjgc.202109003

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ZHAO Qian, ZHUANG Lin-lan, SHENG Qin, ZHANG Jian. ROLE AND DESIGN PRINCIPLES OF SUBSTRATE FOR WASEWATER PURIFICATION IN SUBSURFACE FLOW CONSTRUCTED WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 14-22. doi: 10.13205/j.hjgc.202109003

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ROLE AND DESIGN PRINCIPLES OF SUBSTRATE FOR WASEWATER PURIFICATION IN SUBSURFACE FLOW CONSTRUCTED WETLAND

doi: 10.13205/j.hjgc.202109003

1. School of Environmental Science and Engineering, Shandong University, Qingdao 266000, China;
2. Weishan Ecological Environment Monitoring Center, Jining 277600, China

Received Date: 2020-08-01
Available Online: 2022-01-21

Abstract

Abstract

The wastewater purification in subsurface flow constructed wetland is realized by the combined functions of substrate, microbes, and plant. Substrate, as an important element, plays critical role in wastewater purification. Firstly, substrate could directly absorb pollutants. The efficiency of pollutant absorbance varies with the substrate material, which is also influenced by the water quality, hydraulic condition, etc. Secondly, substrate could provide the surface for microbes to form biofilm. The properties of substrate, e.g. the material, the saturated/unsaturated condition of substrate, the inner porous structure, and specific surface area, all affect the formation and development of biofilm, as well as the wastewater purification indirectly. Increasing the unsaturated area of substrate, adding the material that could slow-release carbon source, adding Fe-C micro-electrolysis material could improve the removal of ammonia, total nitrogen, and phosphorus by enhancing the oxygen supplement, denitrification process and the chemical sedimentation process, respectively.
- subsurface flow constructed wetland,
- substrate,
- nitrogen and phosphorus removal,
- microbial community structure,
- unsaturated status

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References

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