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Sewage Sludge-Derived Biochar and Its Potential for Removal of Ammonium Nitrogen and Phosphorus from Filtrate Generated during Dewatering of Digested Sludge

Author

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  • Katarzyna Wystalska

    (Faculty of Infrastructure and Environment, Czestochowa University of Technology, 42-200 Czestochowa, Poland)

  • Anna Grosser

    (Faculty of Infrastructure and Environment, Czestochowa University of Technology, 42-200 Czestochowa, Poland)

Abstract

Utilizing waste, such as sewage sludge, into biochar fits the circular economy concept. It maximizes the reuse and recycling of waste materials in the wastewater treatment plant. The experiments were conducted to assess: (1) the impact of the temperature on the properties of biochar from sewage sludge (400 °C, 500 °C, 600 °C, 700 °C); (2) how the physical activation (CO 2 , hot water) or chemical modification using (MgCl 2 , KOH) could affect the removal of ammonia nitrogen and phosphorus from filtrate collected from sludge dewatering filter belts or synthetic solution, wherein the concentration of ammonium nitrogen and phosphorus were similar to the filtrate. Based on the Brunner–Emmett–Teller (BET) surface and the type and concentration of surface functional groups for the second stage, biochar was selected and produced at 500 °C. The modification of biochar had a statistically significant effect on removing nitrogen and phosphorus from the media. The best results were obtained for biochar modified with potassium hydroxide. For this trial, 15%/17% (filtrate/synthetic model solution) and 72%/86% nitrogen and phosphorus removal, respectively, were achieved.

Suggested Citation

  • Katarzyna Wystalska & Anna Grosser, 2024. "Sewage Sludge-Derived Biochar and Its Potential for Removal of Ammonium Nitrogen and Phosphorus from Filtrate Generated during Dewatering of Digested Sludge," Energies, MDPI, vol. 17(6), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:6:p:1310-:d:1353898
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    References listed on IDEAS

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    1. Ci Fang & Tao Zhang & Ping Li & Rong-feng Jiang & Ying-cai Wang, 2014. "Application of Magnesium Modified Corn Biochar for Phosphorus Removal and Recovery from Swine Wastewater," IJERPH, MDPI, vol. 11(9), pages 1-21, September.
    2. Nuhu Dalhat Mu’azu & Nabeel Jarrah & Mukarram Zubair & Omar Alagha, 2017. "Removal of Phenolic Compounds from Water Using Sewage Sludge-Based Activated Carbon Adsorption: A Review," IJERPH, MDPI, vol. 14(10), pages 1-34, September.
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