Pervaporative recovery of ABE during continuous cultivation: Enhancement of performance
Pervaporative recovery of ABE during continuous cultivation: Enhancement of performance
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DOI：
10.1016/j.biortech.2012.11.072
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发表时间：
2013-02-01
影响因子：
11.4
通讯作者：
De Weyer, Heleen
中科院分区：
文献类型：
--
作者：
Van Hecke, Wouter;Hofmann, Tim;De Weyer, Heleen
丙酮、丁醇和乙醇的连续两段发酵与渗透汽化相结合，利用乙酰丁酸杆菌ATCC 824的自由悬浮细胞进行发酵。PDMS复合渗透汽化膜直接耦合到第二发酵罐，降低了溶剂效价。当饲料中碳水化合物浓度从60g L提高到120g L-1时，总产能从0.45g L-1h(-1)提高到0.88g L-1h(-1)。当碳水化合物浓度进一步提高到150g L-1时，尽管第一罐的发酵产量因底物抑制而显着下降，但总产能达到1.13g L-1h(-1)。在这个持续200h的阶段，平均通量达到0.621 kg m(-2)h(-1)，渗透液中的总溶剂浓度为202g L-1。第二发酵罐中较高的溶剂滴度有利于渗透汽化装置的性能，从而导致较高的通量和渗透液中的总溶剂浓度。(C)2012爱思唯尔有限公司。保留所有权利。
Acetone, butanol and ethanol were produced in a continuous two-stage fermentation integrated with pervaporation using freely suspended cells of C. acetobutylicum ATCC 824. PDMS composite pervaporation membranes were directly coupled to the second fermentor which lead to decreased solvent titers. Overall productivity was increased from 0.45 g L-1 h(-1) to 0.88 g L-1 h(-1) when increasing the carbohydrate concentration in the feed from 60 to 120 g L-1. The highest overall productivity of 1.13 g L-1 h(-1) was achieved when increasing the carbohydrate concentration further to 150 g L-1 even though productivity decreased significantly in the first fermentor due to substrate inhibition. In this phase that lasted 200 h, the average flux reached 0.621 kg m(-2) h(-1) and the total solvent concentration in the permeate was 202 g L-1. High solvent titers in the second fermentor were beneficial for the performance of the pervaporation unit leading to higher fluxes and total solvent concentrations in the permeate. (C) 2012 Elsevier Ltd. All rights reserved.