Profile: Environmental Systems Technology and Research, Inc. develops wastewater treatment technology & systems for specific industrial & agricultural applications. We focus on aeration and oxidation treatment systems to achieve faster & comprehensive treatment. We offer products like Hydro-Sparger™ and Hydro-Lesser™. Our Hydro-Sparger™ produces oxygen injectors, which are capable of injecting 86.2 pounds of oxygen per kilowatt-hour (KWH). Our Hydro-Lesser™ is designed to remove a discontinuous oil phase from a continuous water phase.