A study of the aerobic degradation of beet molasses alcoholic fermentation wastewater was carried out using the following fungi: penicillium decumbens, penicillium lignorum and aspergillus niger. These four microorganisms produce a decolorization of the wastewater. P. ducumbens showed the maximum decolorization with a percentage of 40%
Finally, a comparative study of the mesophilic anaerobic digestion of untreated and previously fermented beet molasses was carried out in laboratory-scale suspended cell bioreactors.Average COD removal of 93% and methane yield coefficient of 305 ml methane at STP condition.