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Enhanced Simultaneous Nitrogen and Phosphorus Removal in A Denitrifying Biological Filter Using Waterworks Sludge Ceramsite Coupled with Iron-Carbon

Author

Listed:
  • Xiaoying Zheng

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

  • Mengqi Jin

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

  • Hang Xu

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

  • Wei Chen

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

  • Yuan Zhang

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

  • Mengmeng Yang

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

  • Xiaoyao Shao

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

  • Zhi Xu

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

  • Weihong Wang

    (College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Nongda east road No.311, Sayibak District, Urumqi, Xinjiang Uygur Autonomous Region, China, 830052)

Abstract

In this study, waterworks sludge ceramsite (WSC) was combined with 3% iron-carbon matrix in a denitrifying biological filter (ICWSC-DNBF) to enhance the simultaneous removal of carbon, nitrogen and phosphorus in secondary effluent of wastewater treatment plant (SE-WTP). The chemical oxygen demand (COD) and nitrogen removal, as well as phosphorus removal and the adsorbed forms of phosphorus were measured and the removal mechanism of these pollutants by the ICWSC-DNBF system for treating SE-WTP were investigated. The results showed that the ICWSC-DNBF achieved good removals of COD, NH 4 + -N, NO 3 − -N, total N and total P; effluent concentrations were 17.23 mg/L, 3.72 mg/L, 14.32 mg/L, 17.38 mg/L and 0.82 mg/L, respectively. WSC enhanced the P removal due to its high specific surface area and the high number of adsorption sites. Fe-P and Al-P were the main forms of P adsorbed by WSC, accounting for 78.53% of the total adsorbed P. WSC coupled with Fe and C improved the biodegradability of SE-WTP and promoted the removal of organic matter. The removal of N was attributed to the abundant denitrifying microorganisms in the system and the electrochemical effect produced by the internal electrolysis of Fe and C.

Suggested Citation

  • Xiaoying Zheng & Mengqi Jin & Hang Xu & Wei Chen & Yuan Zhang & Mengmeng Yang & Xiaoyao Shao & Zhi Xu & Weihong Wang, 2019. "Enhanced Simultaneous Nitrogen and Phosphorus Removal in A Denitrifying Biological Filter Using Waterworks Sludge Ceramsite Coupled with Iron-Carbon," IJERPH, MDPI, vol. 16(15), pages 1-13, July.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:15:p:2646-:d:251334
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    Cited by:

    1. Yameng Ma & Jia Zhu & Jianghua Yu & Yicheng Fu & Chao Gong & Xiao Huang, 2022. "Adsorption Characteristics of Phosphate Based on Al-Doped Waste Ceramsite: Batch and Column Experiments," IJERPH, MDPI, vol. 20(1), pages 1-15, December.

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