Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Variation of Sedimentation & Dewaterability Characteristics of Sewage Sludge under Various Coagulants

응집제 종류에 따른 하수 슬러지의 침강 및 탈수 특성 변화

  • Baik, Seon Jai (Department of Environmental Engineering, Graduate School, University of Seoul) ;
  • Jo, Jung Min (Department of Environmental Engineering, Graduate School, University of Seoul) ;
  • Song, Hyun Woo (Department of Environmental Engineering, Graduate School, University of Seoul) ;
  • Han, Ihn Sup (Department of Environmental Engineering, Graduate School, University of Seoul)
  • 백선재 (서울시립대학교 환경공학부) ;
  • 조정민 (서울시립대학교 환경공학부) ;
  • 송현우 (서울시립대학교 환경공학부) ;
  • 한인섭 (서울시립대학교 환경공학부)
  • Received : 2014.03.05
  • Accepted : 2014.05.12
  • Published : 2014.05.30
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Abstract

The purpose of this study is to investigate the effect of various types of coagulant on dewaterability and settleability of sewage sludge for the application of dewatering process. Cationic organic coagulants and inorganic coagulants of the aluminium base were used; PAC (Poly Aluminium chloride, $Al_2O_3$ 17%) and C-210P (0.2%). After Jar test, PAC 26 mg/L and 0.2% C-210P 55 mg/L was decided as the optimum concentration of the coagulant according to zeta potential measurement. pH, alkalinity and viscosity were measured in all experiments and the data on sedimentation characteristics is analyzed by SDI, SVI sedimentation rate and solid flux. The SRF(Specific Resistance of Filtration) experiment was conducted with the result of single and dual injection system as the dewaterability experiment. As a result, the organic coagulant making large floc has good characteristics of sedimentation and agglutination. Also, it is observed that the organic coagulants injection has a better dewaterability efficiency of coagulants under the condition of the lowest SRF value, followed by dual and inorganic coagulants injection.

Keywords

References

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