Sistema per il trattamento delle acque reflue

摘要

A flotation clarification system (1) for wastewater includes: at least one main tank (2) defining a vertical central axis and having a bottom (3) at least a lateral wall (4); at least one sludge collecting device (5) for sludge to be treated; at least one unit (20) for adding air bubbles to water and/or sludge to be treated; and at least one water retaining tank (31). The unit (20) for adding air bubbles includes: at least one duct (33) for a flow of water and/or sludge to be treated; at least one duct (34) for a flow of water added with air; and at least one mixing device (35) configured and dimensioned so that the flow of water added with air is positioned inside the flow of water and/or sludge to be treated and runs into the latter while expanding radially from the inside towards the outside or vice versa.