In the past year there has been increased interest in using high-speed turbo blowers for wastewater aeration. New manufacturers have appeared on the market, and many manufacturers of multistage centrifugal blowers have developed and begun marketing high-speed turbo (HST) blowers. These blowers potentially have significant advantages over traditional blowers, including higher efficiencies, a wider operating range, lower operating noise, and highly integrated instrumentation and controls.
HST blowers also present significant challenges and unknowns. The technology is new to the United States, and although there are numerous installations there is little long term operating information and little information in the wastewater community on design, installation, operation, and maintenance. Retrofitting HST blowers into an existing facility can also present challenges, particularly when the high speed blowers are integrated into a system with multistage centrifugal (MSC) blowers.
This paper presents a case study of the City of Garland, Texas Rowlett Creek Wastewater Treatment Plant. In 2009 the City began designing an upgrade to the aeration system at the plant. During design, high-speed turbo blowers were investigated and specified as the preferred technology for the plant. These blowers were integrated with four existing multistage centrifugal blowers. Blowers were installed and started in 2011.
Read the full white paper which includes discussions on technology, specifications, controls, instrumentation, startup and operational experiences.