Fig. 8
Schematics of in situ ABE recovery from fermentation broth by vacuum stripping. Arrows show direction of ABE flow. The food waste vacuum fermentation system consisted a 2-L fermentation flask, a vacuum pump, a condensation system with a chiller and a coiled condenser and a cold-water trap. During the vacuum application, ABE and water vapors evaporated from the fermentation broth and condensed in the condensation system. The escaped (uncondensed) ABE and water vapors were captured in the cold-water trap