Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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The relation between sewage sludge solubilization and extracellular polymeric substances

하수슬러지 가용화와 체외고분자물질(EPS)간의 관계

  • Jeon, Byeong-Cheol (Department of Operation&Maintenance, DOHWA Engineering) ;
  • Nam, Se-Yong (Department of Civil, Safety and Environmental Engineering, Hankyong National University)
  • 전병철 ((주)도화엔지니어링 O&M사업부) ;
  • 남세용 (국립한경대학교 토목안전환경공학과)
  • Received : 2019.11.20
  • Accepted : 2019.12.09
  • Published : 2019.12.20
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Abstract

In order to investigate the relation between sewage sludge solubilization and extracellular polymeric substances(EPS) during alkaline-ultrasonic pretreatment, SCOD/TCOD ratio, solubilization rate, VSS/TS ratio, VSS reduction rate, LB-EPS(Loosely-Bound EPS) and TB-EPS(Tightly-Bound EPS) were measured. At the condition of TS 1.0% and pH 12, solubilization rate increased by 27.7%, LB-EPS as Carbohydrate and Protein increased by 14.6 and 13.3 mg/L/g TS, respectively. Withal, VSS decreased by 26.7% and TB-EPS as Carbohydrate and Protein were extracted by 15.7 and 21.9 mg/L/g TS, respectively. Consequently, the concentrations of organic matter and LB-EPS increased and the trends appeared similarly. In addition, the concentrations trend of decreasing solid matter and extracted TB-EPS also appeared similarly.

본 연구는 알칼리·초음파 전처리를 통한 하수슬러지의 가용화 정도를 확인하기 위해 슬러지 가용화율과 VSS 감량화율을 측정하였다. 또한 슬러지 가용화와 EPS간의 관계를 확인하기 위해 LB-EPS(Loosely-Bound EPS), TB-EPS(Tightly-Bound EPS)를 측정하였다. 실험 결과, TS 1.0%, pH 12 조건에서 슬러지 가용화율은 27.7% 증가하였고, LB-EPS as Carbohydrate와 Protein은 각각 14.6, 13.3 mg/L/g TS가 증가하여 가용화에 따른 유기물의 변화와 유사한 경향을 나타내었다. 또한 VSS는 26.7% 감량되었고, TB-EPS as Carbohydrate와 Protein은 각각 15.7, 21.9 mg/L/g TS 용출되어 가용화에 따른 고형물의 변화 역시 유사한 경향을 나타내었다.

Keywords

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