한국환경과학회지 (Journal of Environmental Science International)

  • 제31권7호
  • /
  • Pages.609-616
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  • 2022
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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열-알칼리성 전처리에 따른 폴리하이드록시부티레이트의 혐기성 소화 개선 효과 조사

Improving Anaerobic Digestion of Polyhydroxybutyrate by Thermal-Alkaline Pretreatment

  • ;
  • 이준엽 (부경대학교 지구환경시스템과학부(환경공학전공))
  • Trang, Le Thi Nhu (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Lee, Joonyeob (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University)
  • 투고 : 2022.05.06
  • 심사 : 2022.05.25
  • 발행 : 2022.07.31
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초록

In this study, the effect of different reaction times for thermal-alkaline pretreatment on the solubilization and biogasification of polyhydroxybutyrate (PHB) were evaluated. Thermal-alkaline pretreatment tests were performed at 73 ℃ and pH 13 at 0-120 h reaction times. The mesophilic anaerobic batch tests were performed with untreated and pretreated PHB samples. The increase in the pretreatment reaction time results in a 52.8-98.8% increase of the abiotic solubilization efficiency of the PHB samples. The reaction time required to achieve solubilization efficiencies of 50%, 90%, and 95% were 10.5, 52.0, and 89.6 h, respectively. The biogasification of the untreated PHB samples achieved a specific methane production rate of 3.6 mL CH4/g VSS/d and require 101.3 d for complete biogasification. The thermal-alkaline pretreatment significantly improved specific methane production rate (10.2-16.0 time increase), lag time (shortened by 76-81%), and time for complete biogasification (shortened by 21-83%) for the biogasification of the PHB samples when compared to those of the untreated PHB samples. The improvement was higher as the reaction time of the thermal-alkaline pretreatment increased. The findings of this study could be used as a valuable reference for the optimization of the biogasification process in the treatment of PHB wastes.

키워드

과제정보

본 연구는 2021년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다(No. 2021R1C1C1009122). 또한 본 연구는 환경부의 폐자원에너지화 전문인력양성사업으로 지원되었습니다(YL-WE-21-002).

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