Profile: U. S. Filter/Zimpro designs, builds, installs and operates wastewater treatment equipments & systems for industrial and municipal clients. We develop wet air oxidation process for the treatment of spent caustic liquors and other industrial wastewaters. We also focus on PACT system, which combines powdered activated carbon adsorption with biological treatment. We cater plate settlers, filter presses, gravity sand filters, pumps and other treatment equipments.