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首页> 外文期刊>Sugar Tech >Comparative Study of Chemical Pretreatments and Acid Saccharification of Bagasse of Sugar Crops for Ethanol Production
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Comparative Study of Chemical Pretreatments and Acid Saccharification of Bagasse of Sugar Crops for Ethanol Production

机译：乙醇糖用蔗渣化学预处理和蔗糖酸糖化的比较研究。

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The bagasse of two sugar crops i.e. sugarcane (variety CoJ 83) and sweet sorghum (variety RSSV 9) were evaluated for their potential for the production of bioethanol. Different chemical pretreatments were carried out with 2 % H2O2, 1 % NaOH and 2 % H2O2 + 1 % NaOH solutions each with pH 11.5 and 13 for 24, 48 and 72 h followed by saccharification of pretreated bagasse with sulfuric acid (0.8 and 1 M) for 50 min. Bagasse hydrolysates were then fermented with Saccharomyces cerevisiae var ellipsoideus for ethanol production. The amounts of cellulose, hemicellulose and lignin were 47.1, 29.2, 11.2 % in sugarcane and 45.8, 28.1, 14.0 % in sweet sorghum respectively. Loss of weight in alkaline pretreatment was found more in sugarcane (45.4 %) than in sweet sorghum (43.1 %). The maximum amounts of reducing sugars 528.8 and 504.8 mg/g were obtained by saccharification of pretreated bagasse of sugarcane and sweet sorghum respectively, after saccharification with 0.8 M H2SO4. Bioethanol production was found maximum 30.5 and 26.2 ml/100 g pretreated bagasse in sugarcane and sweet sorghum with pretreatment conditions of (2 % H2O2 + 1 % NaOH; pH 11.5, 72 h) and (2 % H2O2 + 1 % NaOH; pH 13, 72 h) respectively, followed by saccharification with 0.8 M H2SO4, and fermentation for 72 h. But when estimated ethanol production on unit weight basis of crops, it was found higher in sweet sorghum (25.4 L/ton stalks) crop than in sugarcane (21.4 L/ton stalks).
机译：评价了两种糖料的甘蔗渣，即甘蔗（品种CoJ 83）和甜高粱（品种RSSV 9）的生产生物乙醇的潜力。用2％H2O2、1％NaOH和2％H2O2 + 1％NaOH溶液（分别具有pH 11.5和13）进行不同的化学预处理24、48和72小时，然后用硫酸（0.8和1 M ）50分钟。然后将甘蔗渣水解产物用酿酒酵母（Saccharomyces cerevisiae var ellipsoideus）发酵以生产乙醇。甘蔗中的纤维素，半纤维素和木质素的含量分别为47.1％，29.2％，11.2％和甜高粱的45.8％，28.1％，14.0％。在碱性预处理中，甘蔗（45.4％）比甜高粱（43.1％）的体重减轻更多。在用0.8 M H2SO4糖化后，分别对甘蔗和甜高粱的预处理甘蔗渣进行糖化，可获得最大量的还原糖528.8和504.8 mg / g。发现在（2％H2O2 + 1％NaOH; pH 11.5，72 h）和（2％H2O2 + 1％NaOH; pH 13 ，分别72小时），然后用0.8M H 2 SO 4糖化，并发酵72小时。但是，当按作物的单位重量估算乙醇产量时，发现甜高粱（25.4升/吨秸秆）作物的甘蔗产量高于甘蔗（21.4升/吨秸秆）。

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