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首页> 外文期刊>Energy Conversion & Management >Fermentative ethanol production from Madhuca indica flowers using immobilized yeast cells coupled with solar driven direct contact membrane distillation with commercial hydrophobic membranes
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Fermentative ethanol production from Madhuca indica flowers using immobilized yeast cells coupled with solar driven direct contact membrane distillation with commercial hydrophobic membranes

机译：利用固定的酵母细胞，结合太阳驱动的直接接触膜蒸馏和商业疏水膜，从马杜卡花中发酵生产乙醇

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摘要

The objective of the present investigation is to develop and evaluate economic production of biofuels (ethanol) using immobilized yeast cells (Saccharomyces cerevisiae NCIM 3095) from renewable carbon source Madhuca indica (Mahua flowers). The entrapment of yeast cells in calcium alginate-polyvinyl alcohol (CA-PVA) film were found most suitable immobilizing matrix as a protective carrier to increase the stability and tolerance limit during continuous fermentation. Under similar fermentation conditions, immobilized yeast cells produced higher ethanol yield (similar to 0.48 g/g) and productivity (similar to 28 g/L/h) as compared to traditional suspended free cells system in continuous fermentation with dilution rate of 0.4/h. Further, the fermenter was coupled with solar driven membrane distillation (SDMD) process for separation and concentration of ethanol after fermentation. The new system does not require centrifugation/microfiltration for separation and/or recycle of biomass as the cells were immobilized and could be easily separated by simple filtration. The SDMD with cross flow module in rectangular shape and counter-current flow of streams (hot and cold) ensured higher ethanol flux (23 kg EtOH/m(2)/24 h) in comparison to existing literature. The new process design is compact yet flexible, eco-friendly, energy intensive and sustainable process for the development of economic biofuel production.
机译：本研究的目的是开发和评估使用固定化酵母细胞（酿酒酵母NCIM 3095）和可再生碳源印度Mad（Mahhuca）（马化花）的生物燃料（乙醇）的经济生产。发现在藻酸钙-聚乙烯醇（CA-PVA）膜中截留酵母细胞是最合适的固定基质作为保护性载体，以增加连续发酵过程中的稳定性和耐受极限。在相似的发酵条件下，与传统的悬浮游离细胞系统连续发酵（稀释率为0.4 / h）相比，固定化酵母细胞产生更高的乙醇产量（约0.48 g / g）和生产力（约28 g / L / h）。 。此外，发酵罐与太阳能驱动膜蒸馏（SDMD）工艺结合，用于发酵后乙醇的分离和浓缩。新的系统不需要离心/微滤就可以分离和/或回收生物质，因为细胞被固定了，可以通过简单的过滤容易地分离。具有矩形交叉流模块的SDMD和逆流流（冷热）确保了与现有文献相比更高的乙醇通量（23 kg EtOH / m（2）/ 24 h）。新工艺设计紧凑，灵活，环保，能源密集和可持续的工艺，可用于经济型生物燃料生产的发展。

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