With the largest multistage centrifugal blower selection available today, Gardner Denver has been serving the wastewater treatment market for more than 60 years. Centrifugal blower products include multistage blowers/exhausters (formerly Lamson and Hoffman) and regenerative blowers/exhausters (formerly TurboTron). Gardner Denver multistage centrifugal blowers are the proven standard for wastewater treatment applications requiring continuous low-noise operation with minimal maintenance requirements. They are primarily used for aeration and aerobic digestion, but can also be used in filter backwash and digester gas boosting applications.