The ecological system for treating wastewater includes three steps: a pre-treating stage, a second stage of enzymatic anaerobic reaction and finally a post-treatment stage, the post-treatment including a desanding element, a double grid, and a sump. The second stage also called primary treatment includes one or a plurality of enzymatic anaerobic reactors in cascade or in series of ascendant flow and finally the post-treatment is constituted by: a hydrated limestone filter, a volcanic rock filter and a swamp, a system for collecting metabolic elements based on aquatic lily and an emitter. Said combination of stages allows the enzymatic anaerobic reactors of ascendant flow to remove from about 75% to about 85% of the pollutants present in the water, which substantially reduces the post-treatment area. The pre-treatment stage includes separating and collecting sludges and rubbish such as plastics, branches, sand and the like; the primary treatment includes the removal of the highest part of organic matter that is present and dissolved in the water (carbon), the post-treatment process including aeration and elimination of nitrogen, phosphorus and potassium, and finally, the incorporation of the aquatic lily providing an efficiency of 90% in the elimination of polluting particles, which helps to reincorporate the water so that it can be used again.
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