The invention relates to a method for processing vinasse, a byproduct of the distillation of fermented sugar cane must during alcohol production, with the aim of reducing the turbidity thereof for use as a culture medium for growing micro-organisms, including micro-algae and cyanobacteria. The method according to the invention is based on vinasse carbonation in a strong basic medium, with injection of CO2. Furthermore, the process according to the invention promotes carbon fixation and reduces the biological oxygen demand (BOD) and chemical oxygen demand (COD) of the vinasse, thus further promoting the physico-chemical and microbiological stabilisation thereof.
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