Biodiesel biorefinery: opportunities and challenges for microbial production of fuels and chemicals from glycerol waste.
Biodiesel biorefinery: opportunities and challenges for microbial production of fuels and chemicals from glycerol waste.
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DOI：
10.1186/1754-6834-5-48
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发表时间：
2012-07-18
影响因子：
6.3
通讯作者：
Quirino BF
中科院分区：
文献类型：
--
作者：
Almeida JR;Fávaro LC;Quirino BF
在过去的5年里，世界范围内生物柴油产量的显著增加导致了原油甘油的化学计量量的增加。由于生产了过量的粗甘油，其市场价值降低，它正在成为一种“废物流”，而不是有价值的“副产品”。生物精炼厂的发展，即将化学品和电力的生产与生物质转化为生物燃料的过程结合起来，已被挑出来作为实现经济上可行的生产链、使残留物和副产品增值以及减少工业废物处置的一种方式。从这个意义上说，几种旨在利用粗甘油通过微生物发酵生产燃料和化学品的替代方案已经进行了评估。本文综述了利用微生物发酵甘油生产生物燃料和化学品（1,3-丙二醇、2,3-丁二醇、乙醇、正丁醇、有机酸、多元醇等）的不同策略。首先简要介绍每种化学品的工业用途；然后，我们系统地总结和讨论了生产每种化学品的不同策略，包括生产者的选择和基因工程，以及工艺条件的优化，以提高产量和生产率。最后，对迄今为止取得的发展的影响进行了展望，并考虑了使用粗甘油开发生物柴油基生物精炼厂的机遇和挑战。总之，微生物发酵甘油代表了一个显著的替代方案，为生物柴油生产链增加价值，有助于生物精炼厂的发展，这将使这种生物燃料更具竞争力。
The considerable increase in biodiesel production worldwide in the last 5 years resulted in a stoichiometric increased coproduction of crude glycerol. As an excess of crude glycerol has been produced, its value on market was reduced and it is becoming a “waste-stream” instead of a valuable “coproduct”. The development of biorefineries, i.e. production of chemicals and power integrated with conversion processes of biomass into biofuels, has been singled out as a way to achieve economically viable production chains, valorize residues and coproducts, and reduce industrial waste disposal. In this sense, several alternatives aimed at the use of crude glycerol to produce fuels and chemicals by microbial fermentation have been evaluated. This review summarizes different strategies employed to produce biofuels and chemicals (1,3-propanediol, 2,3-butanediol, ethanol, n-butanol, organic acids, polyols and others) by microbial fermentation of glycerol. Initially, the industrial use of each chemical is briefly presented; then we systematically summarize and discuss the different strategies to produce each chemical, including selection and genetic engineering of producers, and optimization of process conditions to improve yield and productivity. Finally, the impact of the developments obtained until now are placed in perspective and opportunities and challenges for using crude glycerol to the development of biodiesel-based biorefineries are considered. In conclusion, the microbial fermentation of glycerol represents a remarkable alternative to add value to the biodiesel production chain helping the development of biorefineries, which will allow this biofuel to be more competitive.
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影响因子：
2.8
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