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首页> 外文期刊>Fuel >Ethanol production via repeated-batch fermentation from carob pod extract by using Saccharomyces cerevisiae in biofilm reactor
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Ethanol production via repeated-batch fermentation from carob pod extract by using Saccharomyces cerevisiae in biofilm reactor

机译：在生物膜反应器中使用酿酒酵母通过角豆荚提取物的反复分批发酵生产乙醇

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摘要

In present study, repeated-batch fermentation in biofilm reactor was evaluated for ethanol production by using carob extract. Response surface method (RSM) was used to determine optimum initial sugar concentration, pH, and agitation in the constructed biofilm reactor. The optimum conditions for ethanol production in biofilm reactor were determined as initial sugar content of 7.71 degrees Bx, pH of 5.18 and agitation of 120 rpm. The ethanol production (P), the yield (Y-P/S) and production rate (Q(P)) were found as 24.51 g/L 48.59% and 2.14 g/L/h at the optimized conditions, respectively. The fermentation time for maximum ethanol production in carob extract was reduced to 12 h by using a biofilm reactor compared the published data in the literature, which was 30 and 24 h by using suspended and immobilized yeasts in a stirred tank reactor, respectively. Furthermore, the effect of various nitrogen sources and enrichment were also evaluated and Y-P/S, Q(S) and Q(P) were significantly decreased compared to the results obtained from optimum conditions in biofilm reactor. Overall, results showed that a biofilm reactor for ethanol production from carob extract can be successfully implemented in point of reducing fermentation time, eliminate re-inoculation of the typical batch fermentation as well as increasing production yield. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在本研究中，通过使用角豆树提取物评估了在生物膜反应器中的分批重复发酵的乙醇产量。响应面法（RSM）用于确定构建的生物膜反应器中的最佳初始糖浓度，pH和搅拌。在生物膜反应器中生产乙醇的最佳条件确定为初始糖含量为7.71 Bx，pH为5.18，搅拌为120 rpm。在最佳条件下，乙醇产量（P），产率（Y-P / S）和生产率（Q（P））分别为24.51 g / L，48.59％和2.14 g / L / h。与文献中公开的数据相比，通过使用生物膜反应器将角豆提取物中最大乙醇生产的发酵时间减少至12小时，分别通过在搅拌釜反应器中使用悬浮和固定化酵母分别为30和24小时。此外，与从生物膜反应器中的最佳条件获得的结果相比，还评估了各种氮源和富集的效果，并且显着降低了Y-P / S，Q（S）和Q（P）。总体而言，结果表明，从减少发酵时间，消除典型批次发酵的再接种以及提高生产产量的角度出发，可以成功地实施从角豆提取物生产乙醇的生物膜反应器。 （C）2015 Elsevier Ltd.保留所有权利。

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