期刊
BIORESOURCE TECHNOLOGY
卷 224, 期 -, 页码 380-388出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.11.010
关键词
ABE fermentation; Pervaporation; PDMS membrane; In situ product recovery
资金
- National Basic Research Program of China [2013CB733600]
- National Nature Science Foundation of China [21390202, 21476015, 21676014]
- National High-Tech R& D Program of China [2014AA021903]
- National Key Scientific Instruments and Equipment Development Special Fund [2012YQ0401400302]
Two-stage pervaporation for ABE recovery from fermentation broth was studied to reduce the energy cost. The permeate after the first stage in situ pervaporation system was further used as the feedstock in the second stage of pervaporation unit using the same PDMS/PVDF membrane. A total 782.5 g/L of ABE (304.56 g/L of acetone, 451.98 g/L of butanol and 25.97 g/L of ethanol) was achieved in the second stage permeate, while the overall acetone, butanol and ethanol separation factors were: 70.7-89.73, 70.48-84.74 and 9.05-13.58, respectively. Furthermore, the theoretical evaporation energy requirement for ABE separation in the consolidate fermentation, which containing two-stage pervaporation and the following distillation process, was estimated less than similar to 13.2 MJ/kg-butanol. The required evaporation energy was only 36.7% of the energy content of butanol. The novel two-stage pervaporation process was effective in increasing ABE production and reducing energy consumption of the solvents separation system. (C) 2016 Elsevier Ltd. All rights reserved.
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