Abstract: The invention relates to a method for accelerating biomass production, based on the culture of microalgae, using, for implementing said method, a reactor specifically designed therefor, in which a culture of water with microalgae, with nutrients and CO2 is placed in said reactor, a direct current being passed through the interior thereof. The invention also relates to a second, variant embodiment comprising the addition of means for oxygenating the microalgal culture that is the subject of the method, involving the further incorporation of a closed circuit for utilizing the water used by said apparatus, plus the corresponding filter.