A Study on the Coagulation of Wastewater Containing Fine Silica Particles with the Waste Slurry from Soda Ash Manufacturing Industries

소오다회 제조 공장의 폐슬러리를 이용한 미세 실리카 함유 폐수의 응집에 관한 연구

  • Jun, Se Jin (Department of Environmental Engineering, Daewon Technical College) ;
  • Yim, Sung Sam (Department of Environmental Engineering, Inha University)
  • 전세진 (대원공과대학 환경공업과) ;
  • 임성삼 (인하대학교 환경공학과)
  • Received : 1999.08.18
  • Accepted : 1999.10.16
  • Published : 1999.11.10

Abstract

The objectives of this study are to examine the applicability of waste slurry from soda ash manufacturing industries as a coagulant for the treatment of wastewater containing fine silica particles, and to reduce the cost of wastewater treatment containing silica. Acceptable water quality can be obtained with a little dosing of waste slurry by gelation before the coagulation process so it could be concluded that the waste slurry from soda ash can be used as a coagulant. Based on the results of experiments, the optimum pH of gelation for silica in wastewater was around five and the treatment process with the gelation of silica could reduce the chemical dosage and waste sludge after coagulation. Dewatering and settling characteristics of the floc after coagulation with the waste slurry are better than those of the floc after coagulation with the lime milk only.

Acknowledgement

Supported by : 대원공과대학

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