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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Fuel ethanol production from concentrated food waste hydrolysates in immobilized cell reactors by Saccharomyces cerevisiae H058
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Fuel ethanol production from concentrated food waste hydrolysates in immobilized cell reactors by Saccharomyces cerevisiae H058

机译：酿酒酵母H058在固定细胞反应器中从浓缩的食物垃圾水解产物中生产燃料乙醇

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BACKGROUND: Continuous ethanol fermentation of concentrated food waste hydrolysates has been studied. The process was carried out in an immobilized cell reactor with beads of calcium-alginate containing immobilized Saccharomyces cerevisiae H058 at temperature 30 °C and pH 5.0. RESULTS: The total residual sugar decreased with increase of hydraulic retention time (HRT) under various reducing sugar concentrations. Ethanol production by immobilized cells increased with increase in HRT, regardless of the substrate concentrations employed. The highest ethanol concentration of 89.28 g L~(-1) was achieved at an HRT of 5.87 h and reducing sugar concentration of 200 g L~(-1). At an HRT of 1.47 h, the maximum volumetric ethanol productivity of 49.88 g L~(-1) h~(-1) and the highest ethanol yield of 0.48 g g~(-1) were achieved at reducing sugar concentration of 160 and 200 g L~(-1), respectively. The difference between the fresh and the 30-day Ca-alginate immobilized cell was also shown by scanning electronic micrographs of beads taken from their outer and inner surfaces. CONCLUSIONS: Continuous ethanol production from concentrated food waste hydrolysates using immobilized yeast cells is promising in view of the high ethanol productivity obtained at relatively high conversion and excellent reactor stability.
机译：背景：已经研究了浓缩食物残渣水解产物的连续乙醇发酵。该过程在固定的细胞反应器中进行，该反应器中含有温度固定在30℃和pH 5.0的固定化酿酒酵母H058的海藻酸钙珠。结果：在各种糖浓度降低的情况下，总残留糖量随着水力停留时间（HRT）的增加而降低。固定的细胞产生的乙醇随HRT的增加而增加，而与所使用的底物浓度无关。 HRT为5.87 h，还原糖浓度为200 g L〜（-1）时，乙醇的最高浓度为89.28 g L〜（-1）。在1.47 h的HRT下，还原糖浓度分别为160和200时，乙醇的最大容积生产率为49.88 g L〜（-1）h〜（-1），最高乙醇产量为0.48 gg〜（-1）。 g L〜（-1）。新鲜的和30天的钙藻酸盐固定化细胞之间的差异还通过扫描从其外表面和内表面拍摄的磁珠的电子显微照片来显示。结论：考虑到在相对较高的转化率下获得的高乙醇生产率和出色的反应器稳定性，使用固定的酵母细胞从浓缩的食品废水解物中连续生产乙醇是有希望的。

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