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Butanol Extractive Fermentation to Simultaneously Produce "Properties Improved" Biodiesel and Butanol in Water and Energy-saving Operation Mode

Author: ZhangShuMin
Tutor: ShiZhongPing
School: Jiangnan University
Course: Biochemical Engineering
Keywords: Extractive fermentation Butanol Liquid waste reuse Activated Carbon Biodiesel
CLC: TQ923
Type: Master's thesis
Year: 2010
Downloads: 47
Quote: 0
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Abstract


Biodiesel is a clean, renewable liquid fuel, biodiesel, however, the prevalence of poor ignition performance, combustion and low power shortcomings. Butanol extractive fermentation is carried out as extractant biodiesel extraction 10g / L above butanol biodiesel can be used as a high quality improved biodiesel directly use butanol distillation recovery process can significantly reduce consumption. However, the extractive fermentation to produce large amounts of the raffinate (fermented liquid waste) still contains about 8g / L of butanol in the raffinate. Liquid waste directly discharged only serious pollution of the environment, and a waste of valuable fermentation liquid waste products and water. This paper aims to improve the reuse rate of butanol extractive fermentation in the raffinate, most water-saving, energy-efficient way to produce high quality improved biodiesel. Meanwhile, Crafts raffinate most residual butanol is recovered to the most economical and energy-saving manner and improve the yield of the target product - butanol, biodiesel as extractant butanol the extractive fermentation cogeneration \The improved biodiesel and pure butanol solvent, and product diversity goals. The main findings of the study are as follows: (1) the use of n-octanol (octanol / raffinate volume ratio of 0.2:1) the residual butanol extraction and recovery of raffinate, 56% butanol raffinate can be concentrated recycling, butanol concentration in the n-octanol to 25.7g / L, is conducive to the conduct of the purification by distillation of butanol. Under these conditions, the main target product - butanol yield was improved by 44%. (2) efficient adsorbent of activated carbon as a pigment substances may be stripping the vast majority of the remaining liquid fermentation inhibitory substances - melanoidins removal. Using 3% (w / v) activated carbon adsorption treatment raffinate disposable raffinate reuse rate increased from 50% to 100% butanol fermentation performance unaffected. (3) biodiesel extractant butanol extractive fermentation, the use of activated carbon adsorption treatment raffinate repeated full-back with 14 the extractive fermentation stable performance, biodiesel, butanol concentration stabilized at more than 10g / L, achieve the butanol content standards of high quality improved biodiesel. (4) the use of 7L static anaerobic fermentation tank, further validates the feasibility of biodiesel and butanol solvent of water and energy conservation butanol extractive fermentation-generation high quality improved. In this operating mode, the target butanol yield reached 20%, per liter of the fermentation liquid production 0.97L \

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CLC: > Industrial Technology > Chemical Industry > Other chemical industries > Fermentation industry > Fermentation legal system of higher alcohols and polyols
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