No abstract

No abstract

No abstract

1In this study, a simulated lignocellulosic hydrolysate was used in a continuous two-stage fermentor set-2 up for production of acetone, butanol and ethanol. An organophilic pervaporation unit was coupled to 3 the second fermentor. The dilution rate in the first fermentor was kept constant at 0.109 h -1 while the 4 dilution rate in the second fermentor was gradually decreased from 0.056 h -1 to 0.020 h -1. Glucose was 5 completely consumed while 61% of the xylose was consumed at the lowest dilution rate, leading to an 6 overall solvent productivity of 0.65 g.L -1.h -1 and a high concentration of 185 g.kg -1 solvents in the 7 permeate in the last fermentation zone during 192h. Based on the experimental results, a process 8 integrated with organophilic pervaporation was conceptually designed and compared with a base-case. 9Chemcad simulations indicate an energy reduction of ~50% when organophilic pervaporation is used. 10This study also demonstrates significant process flow reductions and energy consumption by the use of 11 organophilic pervaporation as in situ product recovery technology. 12

No abstract