Earticle

초록

영어

The chemical pretreatment with diluted acid solution combined with enzymatic hydrolysis is considered a promising approach for the production of lignocellulosic bioethanol (Hendriks and Zeeman, 2009). Various acid pretreatment catalysts, including nitric acid (Zhang et al., 2011), phosphoric acid (Geddes et al., 2010) and hydrochloric acid (Marcotullio et al., 2011) as well as sulfuric acid (Hsu et al., 2010), have been investigated. Sulfuric acid has been commonly applied and is the least expensive. Nitric acid, on the other hand, is approximately 3-times more expensive but required a shorter reaction time to obtain high sugar concentration (Zhang et al., 2011). Furthermore, nitrate, the salt of nitric acid, could be used as a nitrogen source for fermentation process. Several researchers have observed that a variety of nitrogen sources including yeast extract and peptone (Laopaiboon et al., 2009), ammonium (Yue et al., 2012), amino acid (Albers et al., 1996) and urea (Jones and Ingledew, 1994) have effect on fermentation rate and ethanol production. In this work, rice straw, the most abundant biomass feedstock in Korea, was chosen as the raw lignocellulosic material for ethanol production. The response surface methodology (RSM) was used to optimize nitric acid pretreatment of rice straw for producing maximum xylose yield. Enzymatic hydrolysis of the remaining solid was also conducted at optimal condition to compare sulfuric acid pretreatment. In addition, we explored the effect of nitrate as the nitrogen source on ethanol yield during fermentation using Pichia stipitis.

키워드

저자

• Ilgook KIM [ Dept. of Civil and Environmental Engineering, KAIST, Daejeon, 305-701. ]
• Bomi LEE [ Dept. of Civil and Environmental Engineering, KAIST, Daejeon, 305-701. ]
• Jong-In HAN [ Dept. of Civil and Environmental Engineering, KAIST, Daejeon, 305-701. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576