Patent ID: 8585869
Filing Date: 2013-11-19
Classification: B01D,C02F,Y02W

Abstract:
1. A multi-stage wastewater treatment system comprising: a reservoir adapted to contain wastewater therein; a contained air-water interface liquid evaporator arranged to be operatively disposed in the reservoir, the contained air-water interface liquid evaporator including a partially enclosed vessel arranged to be operatively disposed in the wastewater and defining a confined space including an air entrainment chamber, an air downcomer to blow air into the wastewater inside the mixing chamber, and a first exhaust port arranged to be operatively disposed above the wastewater and to allow water vapor to escape from the mixing chamber; and a wastewater concentrator separate from the contained air-water interface liquid evaporator, the wastewater concentrator comprising a direct contact adiabatic wastewater concentrator system, the wastewater concentrator operatively connected to the reservoir to receive a stream of wastewater from the reservoir and to form additional water vapor and concentrated wastewater from the stream of wastewater, wherein the wastewater concentrator comprises a sump to collect the concentrated wastewater and a second exhaust port arranged to allow the additional water vapor to escape from the wastewater concentrator.