Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
권호 표지

The Study on the Dewaterability Improvement of Water Treatment Sludge Using Powdered Waste Oyster Shells

분말 폐굴껍질을 이용한 정수슬러지의 탈수 개선방안

  • Moon, Jong-Ik (Dept. of Environmental Eng., Dong-A University) ;
  • Choi, Sung-Moon (Dept. of Environmental Eng., Dong-A University) ;
  • Lim, Young-Seok (Dept. of Environmental Eng., Dong-A University) ;
  • Sung, Nak-Chang (Dept. of Environmental Eng., Dong-A University) ;
  • Kim, Chul (Dept. of Environmental System Eng., Dongeui Institute of Technology) ;
  • Kwak, Young-Kyu (Dept. of Environmental System Eng., Dongeui Institute of Technology)
  • 문종익 (동아대학교 환경공학과) ;
  • 최성문 (동아대학교 환경공학과) ;
  • 임영석 (동아대학교 환경공학과) ;
  • 성낙창 (동아대학교 환경공학과) ;
  • 김철 (동의 공업대학 환경시스템공학과) ;
  • 곽영규 (동의공업대학 환경시스템공학과)
  • Published : 2001.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

The object of this study is to find out the characteristics of waste oyster shells and determine the proper dosage of powdered waster oyster shells as the conditioning agent for water treatment sludge dewatering process. The large amount of waste oyster shells which discharges from the oyster farming, occurs serious environmental hazards. However, oysters shell contain large amount(about 38% by weight) of alkaline minerals, such as calcium and magnesium and so on, this natural material is thought to have the petential ability as a good conditioning agent. The results of this study are as follows. The optimum condition for improvement of the water treatment sludge dewaterability is when 6 g of waste oyster shell powder added to 200$m\ell$ of water treatment sludge. At optimum condition, the solid contents can reach to 31.78% and the specific resistance of conditioned sludge is 0.16$\times$10$^{8}$ sec$^2$/g. However, exceeding the of powdered waste oyster shell is needed to get the effective result. Consequently, the waste oyster shell can be a recyclable material to improve the dewaterability of water treatment sludges.

Keywords