STM-Aerotor™ BNR Package Plants

STM-Aerotor Biological Nutrient Removal (BNR) Package Plant Overview

The STM-Aerotor™ Biological Nutrient Removal (BNR) Package Plant uses Activated Sludge and Fixed Film technology as part of a process that provides biological nutrient removal for municipal wastewater treatment.

WesTech Engineering has incorporated the STM-Aerotor IFAS technology into modular package wastewater treatment plants. The fixed film and activated sludge combination allows the STM-Aerotor to accomplish a high level of treatment in a small tank volume. In addition, the unique aeration device of the STM-Aerotor decreases the installed HP requirement saving in overall operational costs.

These package plants can also operate on 230 volt, single-phase power for remote locations and complete automatic control for easy operation. WesTech can design and supply these compact package plants with a variety of treatment options including: flow equalization, digestion, disinfection, and tertiary filtration. Every WesTech package plant will be custom designed to the specific effluent requirements.

The STM-Aerotor package plant delivers the proper wastewater treatment to customers that are not able to connect with a municipal sewer. These package plant applications have unique challenges that must be understood and accommodated with the correct design. For example, a campground facility will experience large fluctuations in flow based on attendance. The ability to easily adjust the plant to these variable loads is critical. The required operator attention becomes another concern for any system. The process stability and mechanical simplicity of the STM-Aerotor makes it the equipment of choice.

Benefits and Features

  • Special polypropylene discs provide perfect environment for fixed film growth
  • No blowers, aeration piping, or diffusers
  • Low HP drives
  • Compact design
  • Stable process
  • Wheels controlled with VFD’s and DO probes
  • Peripheral mixing paddle
  • No odors
  • No noise
  • Low energy requirement
  • Small footprint
  • Improved sludge settling
  • Minimized operator attention
  • Can accommodate seasonal fluctuations in flow rate
  • School Facilities
  • Remote Job Sites
  • Prison Facilities
  • Truck Stops
  • Housing Developments
  • Shopping Malls
  • Campgrounds
  • Restaurants

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