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Aqueous ammonia-soaking pretreatment for increasing cellulolytic digestibility of rice straw

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  • 발행기관
    한국생물공학회 바로가기
  • 간행물
    한국생물공학회 학술대회 바로가기
  • 통권
    2008 춘계학술대회 및 국제심포지움 (2008.04)바로가기
  • 페이지
    pp.167-167
  • 저자
    Ja Kyong Ko, Jin Sub Park, In-Geol Choi, Kyoung Heon Kim
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A98745

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원문정보

초록

영어
Increasing the accessibility of enzymes to cellulose of lignocellulosic biomass has long been
a challenge in bioconversion of lignocellulose into biofuels. In this study, rice straw
produced in S. Korea was pretreated by aqueous ammonia at moderate temperatures to
improve the enzymatic hydrolysis. By selecting the degree of delignification and enzymatic
digestibility as target maximizing functions, pretreatment process conditions of temperature,
time, concentration of ammonia, and solid-to-liquid ratio (S/L ratio) were optimized by using
a response surface methodology (RSM). The tested ranges of reaction conditions were as
follows: a temperature of 50-70°C, a reaction time of 4-12 h, and an ammonia concentration
of 12-28 wt.% at a fixed S/L ratio of 1:6. The effects of ammonia soaking process on the
structure of rice straw were also investigated by crystallinity index and scanning electron
microscopy. These results indicated that the theoretical glucose yield of the aqueous
ammonia-pretreated rice straw by commercial cellulase was significantly increased in
comparison with untreated rice straw approximately from 20 to 70% of theoretical maximum
of glucose hydrolysis yield. The experimental and RSM optimization results showed that
the reaction time and temperature were significant on the degree of lignin removal and
enzymatic digestibility of the pretreated rice straw. The optimum reaction conditions for
achieving the maximum enzymatic digestibility was determined to be 69°C, 10 h, 20.5 wt.%
at a S/L ratio of 1:6.

저자

  • Ja Kyong Ko [ BK 21 Department of Biotechnology, 1Major in Food Bioscience & Technology College of Life Sciences & Biotechnology Korea University, Seoul 136-713, Republic of Korea ]
  • Jin Sub Park [ BK 21 Department of Biotechnology, 1Major in Food Bioscience & Technology College of Life Sciences & Biotechnology Korea University, Seoul 136-713, Republic of Korea ]
  • In-Geol Choi [ BK 21 Department of Biotechnology, 1Major in Food Bioscience & Technology College of Life Sciences & Biotechnology Korea University, Seoul 136-713, Republic of Korea ]
  • Kyoung Heon Kim [ BK 21 Department of Biotechnology, 1Major in Food Bioscience & Technology College of Life Sciences & Biotechnology Korea University, Seoul 136-713, Republic of Korea ]

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
  • 설립연도
    1984
  • 분야
    공학>생물공학
  • 소개
    이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다 1. 생물공학 분야의 발전을 위한 연구 협력 2. 생물공학의 실용화를 촉진시키기 위한 산학 협동 3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최 4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간 5. 생물공학 발전을 위한 정책 건의 6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동

간행물

  • 간행물명
    한국생물공학회 학술대회
  • 간기
    반년간
  • 수록기간
    1985~2013
  • 십진분류
    KDC 476 DDC 576

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