Millions of dollars are spent every year shipping wastewater from industrial factories to treatment plants. In less regulated countries, wastewater is dumped untreated, causing various health and environmental concerns. Several wastewater treatment methods exist; however, an energy-efficient, simple, and adaptable option has yet to be found. Evaporation is one treatment option that has the potential to meet these criteria. Since significant heat loss takes place with solar evaporators, porous material has been investigated to minimize the losses by insulating the heat in the upper region of the volume. Thus, by heating up a smaller volume of water on the surface, evaporation is increased; however, solar evaporators have drawbacks such as slow evaporation rates and the need for a large surface area. The goal of this paper is to increase the evaporation rate of electric and natural gas-powered wastewater evaporators by minimizing heat loss. This is achieved by placing an electric heating element in the upper region of the tank and adding insulating carbon foam underneath to insulate the heat. Additionally, tests with 1.2 Sun (1200 Wm²) conditions using a solar thermal energy simulator were performed to increase the evaporation rate even further. Evaporation increased by 38.9% when carbon foam was used. The carbon foam minimized the most heat loss when the water began to boil and convection became very apparent. Ultimately, this study presents a sustainable and more efficient method for evaporating water that can be implemented into industrial wastewater evaporators.