A biotechnical phytodepuration system (1) comprises a filtering bed (6) constituted by inert porous materials and vegetable species (7) planted on the filtering bed (6), where the filtering bed is inoculated with a consortium of microorganisms comprising : a) at least one symbiont fungus belonging to the genus Glomus spp. or Gigaspora spp., b) at least one saprophytic fungus belonging to the genus Trichoderma spp., and c) at least one bacterium of the rhizosphere selected among the genera Bacillus spp., Pseudomonas spp. and Actinomycetales spp.
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