AERATION BLOWER REPLACEMENT PROJECT
A key part of municipal wastewater treatment is a biological process, referred to as secondary treatment. High volume blowers are used to feed air into large tanks in order to provide optimal conditions for biological growth and treatment. These aeration blowers use a great deal of electricity – energy demand from this equipment has a very high associated cost each and every month.
The District is now undertaking a project to replace two existing 150 horsepower centrifugal blowers, which have been in service since 1993, with new 75 horsepower high speed turbo blowers. This is a relatively new type of aeration blower that operates with a wider range of air flow and can be controlled to match the precise oxygen demand within the process tanks. The result will be very significant reduction in energy use
Based on a comprehensive technical evaluation, the District selected turbo blowers manufactured by APG Neuros. Accurate dissolved oxygen monitoring equipment and automated valves will be used to control delivery of air to the aeration basins and maintain. Once the project is complete, the District expects to realize an annual energy savings of approximately thirty percent. The project cost will also be offset by an energy efficiency rebate from Southern California Edison.