Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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[Retracted]Characteristics of phosphorus and ammonia behavior of waste activated sludge for MAP crystallization application

[논문철회]MAP 결정화 적용을 위한 잉여슬러지의 인 및 암모니아의 거동 특성

  • Oh, Kyungsu (Graduate School of Energy & Environment, Seoul National University of Science & Technology) ;
  • Kim, Jangho (HANKYUNG E&C CO.,LTD, Corporation) ;
  • Park, Kitae (Graduate School of Water Resources, Sungkyunkwan University) ;
  • Park, Daewon (Graduate School of Energy & Environment, Seoul National University of Science & Technology) ;
  • Kim, Hyungsoo (Graduate School of Water Resources, Sungkyunkwan University)
  • 오경수 (서울과학기술대학교 에너지환경대학원) ;
  • 김장호 (주식회사 한경이엔씨) ;
  • 박기태 (성균관대학교 수자원전문대학원) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원) ;
  • 김형수 (성균관대학교 수자원전문대학원)
  • Received : 2020.10.16
  • Accepted : 2020.12.30
  • Published : 2021.02.15
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Abstract

Phosphorus is a vital resource for sustaining agriculture and nutrition, but a limited non-renewable resource. This paper aimed to derive the behavioral characteristics of phosphate, ammonia and metals of waste activated sludge (WAS) by process of activated sludge for application of magnesium ammonium phosphate (MAP) crystallization system. WAS used in the experiment was obtained in each activated sludge process, such as A2O, MLE (Modified Ludzack Ettinger), and oxidation ditch. WAS was analyzed for the behavior of phosphate ammonia and metallic materials according to pH and microwave conditions. As a result of evaluating the phosphate, nitrogen, and metal material behavior of each WAS according to the microwave and pH conditions, the release path of the polyphosphate contained in the cells into the phosphate form by analyzing the phosphorus release rate of the excess sludge of various microbial community structures was confirmed. These results are believed to be able to estimate the origin of the released phosphate. In addition, the evaluation of the behavior of phosphate, nitrogen, and metal substances according to microwave heating and pH for each activated sludge process was carried out in a batch test, and the amount of phosphate released was in the order of A2O, MLE, and oxidation dich processes. These results confirmed that phosphate emission was closely related to the dominance of polyphosphate-accumulating microorganisms, whereas in the case of ammonia, it was found that the composition of extracellular polymers and the characteristics of influent water were more affected than the dominance of specific microorganisms. The amount of metal released had a direct effect on the reaction pH condition, and the amount of metal ions released from the WAS released under alkaline conditions formed a metal compound with phosphate and ammonia, resulting in less release.

Keywords

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