유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제19권3호
  • /
  • Pages.35-43
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  • 2011
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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복합 전처리를 통한 하수슬러지의 가용화 및 생물학적 유용성에 관한 연구

A study for Solubilization and Bioavailability of Sewage Sludge Using the Complex Pre-treatment

  • 강정현 (서울과학기술대학교 환경공학과) ;
  • 이희수 (서울과학기술대학교 환경공학과) ;
  • 이태진 (서울과학기술대학교 환경공학과)
  • Kang, Jung-Hyun (Department of Environmental Engineering, Seoul National University of Science & Technology) ;
  • Lee, Hee-Soo (Department of Environmental Engineering, Seoul National University of Science & Technology) ;
  • Lee, Tae-Jin (Department of Environmental Engineering, Seoul National University of Science & Technology)
  • 투고 : 2011.07.28
  • 심사 : 2011.09.24
  • 발행 : 2011.09.30
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초록

본 연구에서는 하수슬러지를 전처리 과정을 통해 가용화한 후 혐기성 생물학적 분해를 실시하였다. 산 또는 알칼리 조건과 초음파처리를 복합적으로 적용하여 전처리 후 슬러지의 가용화율을 비교하였으며 알칼리 조건에서 초음파처리를 병행하였을 때 최대 가용화율을 얻을 수 있었다. 가용화된 슬러지의 생물학적 유용성은 복합전처리를 실시한 경우 빠른 생물학적 분해와 더불어 총 가스 발생량은 10배 이상 증가하였으며 가용화된 슬러지에서 바이오가스 생산 가능성을 확인 하였다. 전처리를 실시한 슬러지를 이용하여 생물학적 분해를 실시하였을 때 약 50%정도 높은 수소생성율의 지표가 되는 B/A비를 확인할 수 있었으나 수소생성에 저해가 되는 lactic acid와 propionic acid가 검출되는 것으로 보아 후속연구가 필요할 것으로 판단되었다.

In this study, anaerobic biological decomposition were attempted after solubilization treatment of sewage sludge with the complex pre-treatment (acid/base treatment with ultrasonic radiation). Solubilization ratios were compared for ultrasonic treatment at acid or base condition. Solubilization effect of the complex pre-treatment was more effective at higher pH. Biological decomposition of complex pre-treated sludge was faster than non treated (raw) sludge, showing 10 times higher total gas production. Biological digestion of the sludge shows more biogas production. B/A ratio. which indicates hydrogen production potential, was 50% higher with complex pre-treated sludge than raw sludge but lactic acid or propionic acid were also detected during anaerobic decomposition process.

키워드

참고문헌

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