A portable wastewater concentrator assembly comprising: a wastewater concentrator including a liquid evaporator assembly, a gas-liquid separator connected with the liquid evaporator assembly, the gas-liquid separator having a sump extending downwardly from a bottom of the gas-liquid separator, the sump including front, rear, and side walls (92, 94, 96, 98) that slope downwardly forming a truncated inverted pyramid, the front wall being sloped at an angle of between 35° and 65° relative to a horizontal longitudinal axis, and the rear wall and the side walls (96, 98) being sloped at an angle of between 45° and 55° relative to the horizontal longitudinal axis, an exhaust assembly having a fan connected with the gas-liquid separator, and a power plant assembly connected with the exhaust assembly and arranged to drive the fan; a skid, the skid including a support frame defining an opening, wherein the wastewater concentrator is attached to and carried by the skid; and a mobile hauling platform; wherein the skid is removably carried by the mobile hauling platform, the front, rear, and side walls (92, 94, 96, 98) of the sump extending downwardly through the opening, and whereby the wastewater concentrator may be hauled as a single unit on the mobile hauling platform for transportation on roads and to remote operating locations, and wherein the support frame is disposed below the liquid evaporator assembly, gas-liquid separator, exhaust assembly, and power plant assembly, and the wastewater concentrator may be removed from the mobile hauling platform as a single unit by lifting the support frame, and the mobile hauling platform comprises a truck bed or a semi-truck trailer comprising an upper level carrying surface and a recessed portion below the upper level carrying surface, the skid is carried on the upper level, and the sump extends below the skid and the upper level into the recessed portion. a wastewater concentrator including a liquid evaporator assembly, a gas-liquid separator connected with the liquid evaporator assembly, the gas-liquid separator having a sump extending downwardly from a bottom of the gas-liquid separator, the sump including front, rear, and side walls (92, 94, 96, 98) that slope downwardly forming a truncated inverted pyramid, the front wall being sloped at an angle of between 35° and 65° relative to a horizontal longitudinal axis, and the rear wall and the side walls (96, 98) being sloped at an angle of between 45° and 55° relative to the horizontal longitudinal axis, an exhaust assembly having a fan connected with the gas-liquid separator, and a power plant assembly connected with the exhaust assembly and arranged to drive the fan; a skid, the skid including a support frame defining an opening, wherein the wastewater concentrator is attached to and carried by the skid; and a mobile hauling platform; wherein the skid is removably carried by the mobile hauling platform, the front, rear, and side walls (92, 94, 96, 98) of the sump extending downwardly through the opening, and whereby the wastewater concentrator may be hauled as a single unit on the mobile hauling platform for transportation on roads and to remote operating locations, and wherein the support frame is disposed below the liquid evaporator assembly, gas-liquid separator, exhaust assembly, and power plant assembly, and the wastewater concentrator may be removed from the mobile hauling platform as a single unit by lifting the support frame, and the mobile hauling platform comprises a truck bed or a semi-truck trailer comprising an upper level carrying surface and a recessed portion below the upper level carrying surface, the skid is carried on the upper level, and the sump extends below the skid and the upper level into the recessed portion.