Pollutant removal in subsurface wastewater infiltration systems with/without intermittent aeration under different organic pollutant loadings

Authors

  • Hexin Fei College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Deli Tong College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Jing Pan College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Yang Zhang College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Linli Huang College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Fan Cheng College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China
  • Fanping Zheng College of Life Science, Shenyang Normal University, 253, Huanghe Street, Shenyang 110034, China

DOI:

https://doi.org/10.4314/wsa.v42i4.09

Keywords:

subsurface wastewater infiltration system, intermittent aeration, oxidation reduction potential, organic pollutant loading, pollutants removal

Abstract

Organic pollutant and nitrogen removal performance of subsurface wastewater infiltration systems (SWISs) with and without intermittent aeration, and operated under different organic pollutant loadings, was investigated. The intermittent aeration strategy not only significantly increased removal rates of organic pollutants and NH4+-N, but also successfully created aerobic conditions at a depth of 50 cm and did not change anoxic or anaerobic conditions at a depth of 80 and 110 cm, resulting in high TN removal. Increasing organic pollutant loading did not affect the removal of organic pollutants and nitrogen in intermittent aerated SWISs. High removal rates of COD (98.0%~98.4%), NH4+-N (93.8%~98.1%) and TN (84.5%~94.0%) were simultaneously obtained in intermittent aerated SWISs for organic pollutant loadings ranging from 7.4 to 29.1 g COD/(m2∙d), and these removal rates were significantly higher than for non-aerated SWISs. The results suggest that intermittent aeration is a reliable option to achieve high nitrogen removal in SWISs, especially with high organic pollutant loading.

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Published

2016-10-25

Issue

Vol. 42 No. 4 October (2016): Water SA

Section

Research paper

License

Copyright (c) 2022 Hexin Fei, Deli Tong, Jing Pan, Yang Zhang, Linli Huang, Fan Cheng, Fanping Zheng

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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The content of this journal is licensed under a Creative Commons Attribution Licence.  Users are permitted to read, download, copy, distribute, print, search or link to the full texts of the articles in this journal under the terms of this Licence, without asking prior permission from the publisher or the author, provided the source is attributed. Copyright is retained by the authors.

How to Cite

Hexin Fei (2016) “Pollutant removal in subsurface wastewater infiltration systems with/without intermittent aeration under different organic pollutant loadings”, Water SA, 42(4 October). doi:10.4314/wsa.v42i4.09.