Methods
The membrane distillation system is described in Fig. 2. This system is operated in batch mode operation. The beer feed (3.1 L) is contained in a feed tank which is circulated by a pumping system into the membrane module. The stream is split into permeate stream that permeates through the membrane and contains mostly alcohol and water and the retentate stream that contains dealcoholized beer with reduced alcohol contents. The retentate stream is then recirculated into the feed tank and the permeate stream is then flowed onto a chiller by the help of vacuum pumping system. The alcohol contents are condensed in the chiller system.