Biochemical process for the denitrification of a composition of hypersaline wastewater, comprising a concentration of at least 0.1% (w / v) nitrate and a concentration of at least 5% (w / v) chloride, which it comprises the step of using a community of halophilic and / or halotolerant bacteria, and which optionally also contains non-specialized members, for denitrification of said hypersaline wastewater, wherein said process comprises selecting said community from a sludge mixture consisting of the 85 to 95% by weight of activated sludge from the denitrification stage of a municipal wastewater treatment plan, and approximately 5 to 15% by weight of saline sludge from the crystallization pond of a solar saline, and where the sludge It comprises bacteria of at least the following genera: Pseudomonas, Bacillus and Halomonas.
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