CAJ | 학술논문

该文对糠醛渣的纤维素酶水解特性进行了研究,探索利用玉米芯制糠醛联产燃料乙醇工业化生产的可行性.分析糠醛渣组分,表明其半纤维素质量分数为3.1%,纤维素为31.6%,说明糠醛生产过程对玉米芯的预处理基本满足高效酶解糖化糠醛渣并转化乙醇的要求;通过纤维素酶用量、温度、pH值、固液比、转速等因素进行条件优化,确定最佳水解条件:每克底物酶用量为6.7FPU,固液质量体积比1︰6,pH5.2,转速80 r/min;在糠醛渣水解体系中加入吐温80,结果表明在酶施用量较低情况下(6.7 FPU/g),吐温80对提高糠醛渣水解转化率效果更为明显;通过最优化水解条件,使糠醛渣纤维素转化率达到78%,据此初步判定以糠醛渣为原料转化乙醇的工业化生产具有较大潜力.
해문대강철사적섬유소매수해특성진행료연구,탐색이용옥미심제강철련산연료을순공업화생산적가행성.분석강철사조분,표명기반섬유소질량분수위3.1%,섬유소위31.6%,설명강철생산과정대옥미심적예처리기본만족고효매해당화강철사병전화을순적요구;통과섬유소매용량、온도、pH치、고액비、전속등인소진행조건우화,학정최가수해조건:매극저물매용량위6.7FPU,고액질량체적비1︰6,pH5.2,전속80 r/min;재강철사수해체계중가입토온80,결과표명재매시용량교저정황하(6.7 FPU/g),토온80대제고강철사수해전화솔효과경위명현;통과최우화수해조건,사강철사섬유소전화솔체도78%,거차초보판정이강철사위원료전화을순적공업화생산구유교대잠력.
Saccharification of lignocellulose is a key cost center in the overall byconversion process. Enzymatic hydrolysis of corncob residues of furfural manufacture(CRFM) was investigated to study the feasibility of mass production of ethanol. Compositional analysis results showed that 3.1% of hemicellulose and 31.6% of cellulose existed in CRFM, which demonstrated that the furfural production process could be regarded as pretreatment of lignocellulose for consequent bioconversion. Parameter optimization of hydrolysis was performed and optimal conditions were as follows: 6.7 FPU of enzymes loading per gram substrate, solid-liquid ratio of 1:6, pH5.2, shaking at 80 r/min. The addition of Tween 80 had more positive effect on enzymatic hydrolysis of CRFM with comparatively low enzyme loading (6.7 FPU/g) than the higher one (10 FPU/g). Cellulose conversion of CRFM hydrolysis was promoted up to 78% under the optimal conditions mentioned above. So co-production of ethanol with CRFM may be a potential way for the industrialized production of ethanol.