Aspen Consolidated Sanitation District

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Current Construction
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Current and Future Construction & Renovation Projects...

Treatment Facility Digester, Aeration Basin, Solids Handling, Flow Equalization, Final Filtration and Disinfection Improvements

Start Date: Fall 2006

Completion Date: Fall 2008

Contractor: RN Civil Construction, Centennial, CO

Engineer: JVA Consulting Engineers, Boulder, CO

In the last couple of years during the peak tourist season, it has been noticed at the wastewater treatment facility that there have been some degree of difficulty in the way that the plant could handle the organic load in the wastewater stream. Due to these issues, the District decided that it would hire an engineering firm to perform a new Comprehensive Performance Evaluation (CPE) on the wastewater treatment facility. The last CPE was performed on 1997. After the CPE was completed, it was found that the current treatment facility was under capacity to handle the organic loads during peak flows to the plant.

The new CPE identified the following necessary upgrades:

  • Conversion of existing digesters to influent flow equalization basins
  • Addition of a new aeration basin
  • On/Off aeration capabilities added to each of the existing basins as well as the new basin with new membrane and coarse bubble diffusers
  • Addition of RAS (return activated sludge) control and monitoring capabilities
  • New cloth-media filtration system to replace old rapid sand filtration.
  • New UV (ultra violet) disinfection system, to replace old chlorination system
  • New WAS (waste activated sludge) storage tank, integrated with a new maintenance garage
  • New rotary drum thickener
  • Conversion of old nitrification towers into aerobic digesters
  • New odor control systems

You can click on the link in the left column to see some of the construction projects currently underway.