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Looking for alternatives for the reuse of wastewater, the effect of the effluent of a plant of Wastewater Treatment, as a nutritive solution in a hydroponic system, was evaluated. Under greenhouse conditions at the Universidad Autnoma Chapingo in Mexico, an experiment were installed and the cauliflower production was evaluated. The nutrient content and chemical quality of the effluent were evaluated. Three nutrient solutions were applied: effluent of the wastewater treatment, mineral nutrient solution, and mixed nutrient solution (effluent supplied with mineral fertilizers), in a volcanic ash named tezontle, as inert substrate. Plant height, fresh and dry weight of foliage and inflorescence were evaluated at the end of the experiment. The highest values of the studied variables were obtained with mixed and mineral nutrient solutions. The use of effluent, byproduct of wastewater treatment, decreases production costs of hydroponic solution and it allows to recycle a waste material.