Sewage water depuration plant, comprising a vertical reactor, with improved nitrogen treatment

Abstract

The present invention concerns un vertical reactor civil and industrial sewage water depuration plant, of the type comprising, in sequence following the flow of water to be depurated: a section (14) of removal of coarse solids which are present in sewage water to be treated, a denitrification basin (18), an oxidation/homogenization basin (20) on the bottom of which a vertical reactor is positioned (22), provided with a plurality of air and oxygen diffusers and with an air lift (23) taking water from the bottom of the vertical reactor (22) and conveying it to a flotation vessel (25) and subsequently to a battery of lamellar packs and from that to a disinfection section (28) and to the outlet, characterised by comprising a second air lift (24) taking water from the vertical reactor (22) at an intermediate height and conveying it to said flotation vessel (25) or to a different flotation vessel (25) and from this to said battery of lamellar packs and subsequently to said disinfection section (28) and to the outlet, means of hydraulic connection by communicating vessels of said denitrification basin (18) and said oxidation/homogenization basin (20), which can be controlled to pass from an open position to a closed position, oxygenation means (48) of said denitrification basin (18) and oxygenation means (46) of said oxidation/homogenization basin (20), stirring means (51) of said denitrification basin (18) and stirring means (49) of said oxidation/homogenization basin (20), and additionally means of detection of oxygen level which is present in said basins (18, 20), controlling the operation of said first deeper air lift (23) and said second less deep air lift (24), and additionally of said oxygenation means (46, 48) and said stirring means (49, 51).

Dependencies are inferred from the claim text.