Envirex® Biological Treatment and Clarification

Source: Evoqua Water Technologies


Evoqua's biological treatment and clarification business is rooted in the first chain systems applied to a wastewater plant. A REX® system from the Chain Belt Company, a precursor to Envirex®, was installed in 1910 and operated for almost seventy years with the support of our experts and aftermarket services. Envirex branded wastewater technologies from Evoqua has continued to be an innovative leader for equipment designs and services for aeration, biological treatment, anaerobic treatment, clarification, digestion, and separation treatment equipment for municipal and industrial applications.

Biological Treatment

Biological treatment is a more natural wastewater treatment process than other wastewater treatment methods. Microorganisms feed on the complex materials present in the wastewater and turn them into simpler substances, preparing the water for further treatment.

The point of this process is to reduce the Biological Oxygen Demand (BOD) level. There are a variety of technologies that can perform biological wastewater treatment including mechanical aerators, air diffusers, SBRs, MBRs, and many more. As technology advances, these systems are becoming more convenient, such as being redesigned with smaller footprints. Biological wastewater treatment also lowers costs because there isn't a great amount of energy that is needed for the process to be performed, thanks to hard-working organisms.

Biological treatment systems from Evoqua provide effective solutions for drinking water, odor control, BOD reduction, aeration, clarification, phosphorous and nitrogen removal.