Aqua Engineers, Inc. (AEI) is a chemical engineering/process engineering consulting firm specializing in the design, construction, operation, and service of water, wastewater treatment, and energy recovery systems. Specific areas of expertise include ceramic membrane filtration and its applications, reverse osmosis (RO) and related polymeric membrane applications, high purity water applications, wastewater treatment technologies, oil-water separation (OWS), and caustic recovery. Aqua Engineers, Inc. offers extensive modeling capabilities including CHEMCAD, HYSIS, MATLAB, and ROSA.