http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
에탄올 생산 향상을 위한 옥살산 전처리 옥수숫대의 효소가수분해 조건 탐색
임우석 ( Woo Seok Lim ),이재원 ( Jae Won Lee ) 한국목재공학회 2012 목재공학 Vol.40 No.4
In this study, we investigated the features of bioethanol fermentation of corncob biomass after oxalic acid pretreatment as well as enzymatic hydrolysis. The enzymatic hydrolysis was performed with Accellerase 1000 and the highest yield of monomeric sugars (64.8 g/ℓ) was obtained at 50°C and pH 4.5 for 96 hrs hydrolysis period. For the ethanol fermentation the monomeric sugars obtained from pretreated corncob were subjected to the biological treatment using Pichia stipitis CBS 6054. It was turned out that ethanol production from oxalic acid pretreated corncob was the most feasible at 10∼14% of biomass loading as well as 15 FPU enzyme amount. Under these fermentation condition, the ethanol yield was approached to 0.47 after 24 hrs fermentation period, which was corresponded to 92.2% of conversion rate.
옥살산 전처리 옥수숫대를 이용한 동시당화발효 최적 조건 탐색
서영준 ( Young Jun Seo ),임우석 ( Woo Seok Lim ),이재원 ( Jae Won Lee ) 한국목재공학회 2011 목재공학 Vol.39 No.6
In this study, we determined optimal conditions for simultaneous saccharification and fermentation (SSF) using corncob biomass pretreated with oxalic acid. The effect of SSF temperature (25.8~34.2˚C) and agitation speed (80~220 rpm) were significant at a 99% confidence level in its effect on ethanol production. The highest ethanol production was expected when SSF was performed at 30˚C, 170 rpm (225 g/ℓ). The ethanol production was improved by mixture of yeast extract (1.25 g/ℓ) and urea (1.25 g/ℓ) as nitrogen source. However, addition of trace metal components and vitamin for SSF was not affected in the ethanol production Optimal concentration of KH2PO4, MgSO4·7H2O for SSF was 1 g/ℓ, 0.25 g/ℓ respectively.