Downstream process options for the ABE fermentation
|Title||Downstream process options for the ABE fermentation|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Journal||FEMS Microbiology Letters|
|Keywords||ABE fermentation, biobutanol, downstream process optimization, gas-stripping, liquid–liquid extraction, Pervaporation|
Butanol is a very interesting substance both for the chemical industry and as a biofuel. The classical distillation process for the removal of butanol is far too energy demanding, at a factor of 220% of the energy content of butanol. Alternative separation processes studied are hybrid processes of gas-stripping, liquid–liquid extraction and pervaporation with distillation and a novel adsorption/drying/desorption hybrid process. Compared with the energy content of butanol, the resulting energy demand for butanol separation and concentration of optimized hybrid processes is 11%–22% for pervaporation/distillation and 11%–17% for liquid–liquid extraction/distillation. For a novel adsorption/drying/ desorption process, the energy demand is 9.4%. But all downstream process options need further proof of industrial applicability.