Severn Trent - MABR WWTP Expansion Trial - Case Study

Challenges for Severn Trent
The consumption of energy is of major concern for Severn Trent Water (STW), PLC, UK. One example is that as part of their customer commitment STW1, plan to make their processes more efficient so that they use less energy and at the same time reduce carbon footprint by 7%. To do this the company wanted a solution that would benefit their 4.2 million customers, their business, and the wider environment, a suitable technology that decreases energy requirements and subsequently reduces emissions of greenhouse gasses.

Solution
One of the ways STW achieve this is through their R&D team, evaluating newer, more energy efficient technologies for inclusion into their treatment plants. In 2013 STW and OxyMem began a collaboration to demonstrate the benefits of OxyMem’s Membrane Aerated Biofilm Reactor (MABR) in meeting a very stringent water quality requirement while also reducing energy consumption. OxyMem’s MABR is an innovative solution to secondary biological wastewater treatment, which can be deployed as a modular unit and be easily fitted into an existing aeration tanks. The OxyMem MABR combines bubble-less aeration and fixed films to provide treatment process for carbon and nitrogen removal bringing the effluent to required discharge standards, in a compact structure.