KSBB Journal

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Dewatering Characteristics for Physico-chemical Properties with Sewage Sludge

하수슬러지의 물리화학적인 조건에 따른 탈수 특성

  • Lee, Chang-Han (Department of Environmental Engineering, Catholic University of Pusan) ;
  • Ahn, Kab-Hwan (Department of Environmental Administration, Catholic University of Pusan) ;
  • Song, Seung-Koo (Department of Chemical Engineering, Pusan National University)
  • 이창한 (부산가톨릭대학교 환경공학과) ;
  • 안갑환 (부산가톨릭대학교 환경행정학과) ;
  • 송승구 (부산대학교 화학공학과)
  • Received : 2009.11.08
  • Accepted : 2009.12.02
  • Published : 2010.02.28
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Abstract

In this study, we found that dewatering properties were related with physico-chemical properties such as sludge concentration, pH, and zeta potential with sewage sludge, Ionic contents in digested sludge were in the order of $Ca^{2+}$ (14.2 mg/g) > $Mg^{2+}$ (1.9 mg/g) > $Na^+$ (1.4 mg/g) > $K^+$ (1.0 mg/g). Divalent ion more than monovalent have influenced on physico-chemical and dewatering properties. Floc size distribution in activated (AS) and digested sludge (DS) increased on lower pH range to be near isoelectric point and than specific resistance to filtration (SRF) decreased. A linear increase in SRF ($5.25\times10^{13}\sim2.86\times10^{14}$ m/kg in AS and $6.89\times10^{14}\sim1.09\times10^{15}$ m/kg in DS) was observed throughout low concentration range of 1230~9960 mg/L in AS and 2700~5400 mg/L in DS.

Keywords

References

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