Energy Requirements for Butanol Recovery Using the Flash Fermentation Technology

dc.creatorMariano, AP
dc.creatorKeshtkar, MJ
dc.creatorAtala, DIP
dc.creatorMaugeri, F
dc.creatorMaciel, MRW
dc.creatorMaciel, R
dc.creatorStuart, P
dc.date2011
dc.dateMAY
dc.date2014-07-30T17:19:39Z
dc.date2015-11-26T17:47:34Z
dc.date2014-07-30T17:19:39Z
dc.date2015-11-26T17:47:34Z
dc.date.accessioned2018-03-29T00:30:14Z
dc.date.available2018-03-29T00:30:14Z
dc.identifierEnergy & Fuels. Amer Chemical Soc, v. 25, n. 5, n. 2347, n. 2355, 2011.
dc.identifier0887-0624
dc.identifierWOS:000290651900048
dc.identifier10.1021/ef200279v
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64813
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/64813
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1288818
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionAcetone-butanol-ethanol (ABE) facilities have traditionally presented unattractive economics because of the large energy consumption during recovery of the products from a dilute fermentation broth (similar to 13 g/L butanol). This problem results from the high toxicity of butanol to microorganisms that catalyze its production. Flash fermentation is a continuous fermentation system with integrated product recovery. The bioreactor is operated at atmospheric pressure and the broth is circulated in a closed loop to a vacuum chamber where ABE is continuously boiled off at 37 degrees C and condensed afterward. With this technology the beer achieved a concentration of butanol as high as 30-37 g/L. This paper studies the energy requirements for butanol recovery using the flash fermentation technology and its effect on the energy consumption by the downstream distillation system. Compressors are used to remove the vapors from the flash tank, thus maintaining the desired vacuum. The heat recovery technique of vapor recompression is used to reduce energy requirements. With this technique the heat generated by the compression and partial condensation of the vapors provides the energy for boil up (heat of vaporization) in the flash tank. Thus the energy requirement for the flash fermentation is essentially the electrical power demanded by compressors. Energy for recirculation pumps accounts for approximately 0.5% of the total energy consumption. Small increments in butanol concentration in the beer can have important positive impacts on the energy consumption of the distillation unit. Nonetheless, the energy use of the recovery technology must be included in the energy balance. For a fermentation with a wild-type strain, the total energy requirement for butanol recovery (flash fermentation + distillation) was 17.0 MJ/kg butanol, with 36% of this value demanded by the flash fermentation. This represents a reduction of 39% in the energy for butanol recovery in relation to the conventional batch process. In the case of a fermentation with a hyper-butanol producing mutant strain, the use of the flash fermentation could reduce the energy consumption for butanol recovery by 16.8% in relation to a batch fermentation with the same mutant strain.
dc.description25
dc.description5
dc.description2347
dc.description2355
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2007/00341-1]
dc.languageen
dc.publisherAmer Chemical Soc
dc.publisherWashington
dc.publisherEUA
dc.relationEnergy & Fuels
dc.relationEnergy Fuels
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectAcetone
dc.titleEnergy Requirements for Butanol Recovery Using the Flash Fermentation Technology
dc.typeArtículos de revistas


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