Assessment of Sludge Solubilization by Aeration and Zero-valent Iron As a Pre-treatment for Anaerobic Digestion

공기주입과 영가철을 이용한 하수슬러지 가용화 연구

  • Kim, Yong-Jun (Department of Environmental and Energy Engineering, Anyang University) ;
  • Park, Jin-Kyu (Ecowillplus Co., Ltd.) ;
  • Tameda, Kazuo (Graduate School of Engineering, Fukuoka University) ;
  • Lee, Nam-Hoon (Department of Environmental and Energy Engineering, Anyang University)
  • Received : 2016.06.10
  • Accepted : 2016.08.23
  • Published : 2016.09.30


The reaction of zero-valent iron (ZVI) with oxygen can produce reactive oxidants capable of oxidizing organic compounds. Thus, the aim of this study was to investigate the effect of pre-treatment on sludge solubilization by ZVI and aeration. The results demonstrated that the aeration pre-treatment with ZVI method was more effective than the only aeration for improving sludge solubilization, indicating that ZVI increased the extent of sludge solubilization. In addition, removal rate of $NH_3-N$ by ZVI and aeration was found to be 34%, while only aeration was 24%. Thus, ZVI and aeration can be employed as an efficient pre-treatment option to achieve higher sludge solubilization and decrease the toxic effect of $NH_3-N$ for sludge digestion.


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