The Titan MBR Mem-Box is an upgrade option that can double plant capacity while also reducing costs. It features a compact design that facilitates insertion into an existing plant with minimal changes to the existing plant structure while doubling plant capacity. It is designed to insert into a plant’s existing aeration basin (concrete or steel), making it more cost-effective than designing and constructing a new plant. Its clean-in-place method reduces operating costs and requires fewer chemicals and less operator time. Other features of the Titan MBR Mem-Box are its robust design that helps prevent breakage experienced in alternatives, as well as its production of higher flux rates over the life of the membrane. The design improves effluent quality dramatically, providing potential for water reuse. Complete nitrification is possible.