In the wastewater–ethanol mixture the amount of precipitated salt increased only up to 100% ethanol added (corresponding to 45% (w/w) of ethanol in the mixture) (from ca. 1.7 to ca. 26.1 %); no significant differences (p > 0.05) in amounts of sodium chloride precipitated in the wastewater were observed by increasing the proportion to ethanol over 1:1 (v/v) (Fig. 2)