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KEE Process selects Flender Motox for rotary biological contactors

Posted: Tuesday 6th February 2007

Wastewater treatment solution provider KEE Process selects Flender Motox geared motors to power its market-leading rotating biological contactors (RBCs) for medium and large applications.

The geared motors feature in KEE Process’s modular packaged DC/DN RBC treatment plants and large diameter RBC modules. The DC module range is optimised for carbonaceous biochemical oxygen demand (BOD) removal and the DN module range is optimised for nitrification and/or total nitrogen removal and phosphorus reduction. KEE’s products are designed to provide self-contained treatment systems for on-site wastewater treatment, containing anoxic and aerobic reactors. They can handle wastewater from between 50 and 1500 people, ideal for hotels or even small villages, with larger flows covered by the installation of multiple RBC modules. Due to being driven by these direct coupled geared motors, the units are virtually silent in operation.

The Flender Motox units are selected due to their low maintenance requirements, high torque reduction to around 1 rpm, and their ongoing low power demands. Each drive has a shrink disc fitted for easy removal. KEE Process also requires longevity from these self-contained units to ensure lowest lifetime costs. Structural components have therefore been designed with a 30-year life and mechanical/electrical components with a 100,000-hour L10 selection life. KEE offers fixed price operation and maintenance contracts for these units.

KEE Process contract engineer Alastair McInnes commented on the Flender choice:

“We have been using Flender gear units for many years as their high efficiency combined with long life and low maintenance is just what we require. Flender’s back-up service is reassuring as we have installed their gear units all over the world, from the Caribbean to Oman. We specify Motox snuggler-type units to ensure the RBCs are as compact as possible, for both shipping and installation purposes.”


More information on Flender Motox and energy efficient geared motors is available from Siemens Flender on 01274 657700, by e-mailing or by visiting Flender’s website at Flender is part of Siemens Automation and Drives. The KEE Process website is at

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