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Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands

Author

Listed:
  • Yaning Wang

    (College of Environment, Hohai University, Nanjing 210098, China)

  • Jinhu Yang

    (College of Environment, Hohai University, Nanjing 210098, China
    Ministry of Education, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China)

  • Hang Xu

    (College of Environment, Hohai University, Nanjing 210098, China
    Ministry of Education, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China)

  • Chenwei Liu

    (Assistant Researcher, Rural Center, Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Nanjing 210042, China)

  • Zhen Shen

    (College of Environment, Hohai University, Nanjing 210098, China
    Ministry of Education, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China)

  • Kai Hu

    (College of Environment, Hohai University, Nanjing 210098, China
    Ministry of Education, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China)

Abstract

The recycling of waterworks sludge has become a trending issue because it not only solves the problem of difficult disposal but also saves land resources. This paper aimed to provide a new idea for the utilization of waterworks sludge to form ceramsite and to purify sewage. The specific surface area, average pore size, and pore volume of the made ceramsite were 8.15 m 2 /g, 8.53 nm, and 1.88 cm 2 /g, respectively. The made ceramsite was applied in a vertical-flow constructed wetland, and the removal efficiency of nitrogen, phosphorus and organic matter in sewage were investigated under the conditions of different start-up periods, hydraulic retention times, matrix filling heights and water quality. The removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH 3 -N), and total phosphorus (TP) in the constructed wetlands were stable at 70%, 60%, and 79%, respectively. This constructed wetland with a ceramic matrix has certain advantages in the total amount of denitrifying microorganisms, with a proportion of 14.92%. The results prove the feasibility of preparing ceramsite from waterworks sludge and applying it as a matrix in a constructed wetland to purify sewage.

Suggested Citation

  • Yaning Wang & Jinhu Yang & Hang Xu & Chenwei Liu & Zhen Shen & Kai Hu, 2019. "Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands," IJERPH, MDPI, vol. 16(15), pages 1-13, July.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:15:p:2637-:d:251046
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    Citations

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    Cited by:

    1. Ismael Vera-Puerto & Hugo Valdés & Christian Correa & Valeria Perez & Roberto Gomez & Erica Alarcon & Carlos Arias, 2021. "Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands," IJERPH, MDPI, vol. 18(9), pages 1-16, May.
    2. Yongpeng Luo & Shenxu Bao & Siyuan Yang & Yimin Zhang & Yang Ping & Chao Lin & Pan Yang, 2021. "Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen," IJERPH, MDPI, vol. 18(14), pages 1-17, July.

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