Wastewater treatment and decontamination unit composed of: - an inlet on the treatment unit to receive the wastewater, - a centrifugal separator composed of: a bowl to collect the sludge and a chamber to collect water, a moving nozzle rotating inside the bowl composed of a nozzle inlet and a nozzle outlet, the inlet of the wastewater treatment communicating with the inlet of the nozzle, the nozzle outlet leading to the sludge collecting bowl, a bowl lid separating the sludge collecting bowl from the water collecting chamber, a channel passing through the bowl lid to discard the cleared water into the water collecting chamber, a centrifugal separator outlet communicating with the water collecting chamber, since the centrifugal separator is able to clear the water from the sludge by centrifuging the wastewater of superior density than the water on the sides of the sludge collecting bowl. a discharging pump to discharge the water passing through the centrifugal separator, composed of a pump inlet and a pump outlet, the pump inlet being linked to the outlet of the centrifugal separator. a filtration device (7, 8, 9, 10) composed of an inlet that is linked to the pump outlet, an unit treatment outlet that is linked to the filtration device outlet, a pump supplying water to the treatment unit inlet at a feed rate in which the pump sucks the water at a flow rate, the feed rate being inferior to the flow rate so that the pump can suck through the centrifugal separator water and air at the same time, - an inlet on the treatment unit to receive the wastewater, - a centrifugal separator composed of: a bowl to collect the sludge and a chamber to collect water, a moving nozzle rotating inside the bowl composed of a nozzle inlet and a nozzle outlet, the inlet of the wastewater treatment communicating with the inlet of the nozzle, the nozzle outlet leading to the sludge collecting bowl, a bowl lid separating the sludge collecting bowl from the water collecting chamber, a channel passing through the bowl lid to discard the cleared water into the water collecting chamber, a centrifugal separator outlet communicating with the water collecting chamber, since the centrifugal separator is able to clear the water from the sludge by centrifuging the wastewater of superior density than the water on the sides of the sludge collecting bowl. a discharging pump to discharge the water passing through the centrifugal separator, composed of a pump inlet and a pump outlet, the pump inlet being linked to the outlet of the centrifugal separator. a filtration device (7, 8, 9, 10) composed of an inlet that is linked to the pump outlet, an unit treatment outlet that is linked to the filtration device outlet, a bowl to collect the sludge and a chamber to collect water, a moving nozzle rotating inside the bowl composed of a nozzle inlet and a nozzle outlet, the inlet of the wastewater treatment communicating with the inlet of the nozzle, a bowl lid separating the sludge collecting bowl from the water collecting chamber, a channel passing through the bowl lid to discard the cleared water into the water collecting chamber, a centrifugal separator outlet communicating with the water collecting chamber, since the centrifugal separator is able to clear the water from the sludge by centrifuging the wastewater of superior density than the water on the sides of the sludge collecting bowl. a discharging pump to discharge the water passing through the centrifugal separator, composed of a pump inlet and a pump outlet, the pump inlet being linked to the outlet of the centrifugal separator. a filtration device (7, 8, 9, 10) composed of an inlet that is linked to the pump outlet, an unit treatment outlet that is linked to the filtration device outlet,