The Closed Loop Reactor process, a modified form of the extended aeration complete mix process from Lakeside Equipment Corporation, provides biological nutrient removal using energy-efficient designs. It produces removal efficiencies that exceed those of advanced tertiary treatment processes. BNR configurations are available with in-basin designs for nitrification and denitrification, as well as external selector configuration for Bio-P and total nitrogen removal. Process monitoring and control systems can be provided to continuously monitor and adjust the operation of the biological reactors to optimize process performance and reduce power costs. The Magna Rotor Aerator provides oxygen and mixing to the basin with reliable operation and high efficiency. 630/837-5640; www.lakeside-equipment.com.