Philadelphia Mixing Solutions, Ltd.™. Philadelphia Mixing Solutions, Ltd. is a leading supplier of custom industrial mixing systems to the wastewater and chemical processing industries in North America. The company works with its customers to create customized mixing solutions that utilize gear drives, shafts and specially designed impellers. The design process utilizes the industry's largest and most sophisticated research and testing facility. The facility includes a one million gallon, full-scale wastewater treatment tank. The tank can simulate full-scale operations and offers quick turnaround testing/modeling of alternative mixing designs. The company operates a large design/application engineering department that specializes in specific industry applications. The company's manufacturing, research and test facility, and corporate headquarters are located at 1221 East Main Street, Palmyra, PA 17078.