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. 

APPLICATIONS
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.  

WESTECH INSTALLATIONS:
• School Facilities
• Remote Job Sites
• Prison Facilities
• Truck Stops
• Housing Developments
• Shopping Malls
• Campgrounds
• Restaurants 

ADVANTAGES:
• Simple mechanism for aeration and mixing in the biological treatment zone
• The low HP drive unit rotates the wheel with two sprockets and a chain, results in energy savings

• The combination of activated sludge and fixed film allows a diverse population of organisms  that handle the daily and seasonal loading fluctuations.

• Odorless and Noise-free operation makes the STM-Aerotor an appropriate system for housing  developments, schools, and campgrounds.