It was observed that all of the parameters increased for the pervaporation
of the broth at low flow rates compared with the model
solutions. For the specific case of the ethanol produced from the enrichment factor, since this parameter relates to the separation
ability by the ratio of permeate and feed weight fractions. A reduction
twice was observed. Also, when comparing the pervaporation
of fermentation broth between different flow rates, all parameters
decrease with the increase of feed flow. In these cases, the effect
observed in the enrichment factor was more pronounced.
3.2.2. Variation of feed weight fraction
Tests were performed with the fermentation broth of varying