Design/Build Project Description

Coca Cola Corporation, Wilsonville, Oregon
Wastewater Pretreatment and Equalization System


As one of the largest beverage producers in the food service industry, Coca Cola Corporation has bottling plants worldwide. A large number of beverages are bottled in the Wilsonville plant; both sugar and non suger beverages. The facility also houses a reclaim/recycle facility for beverages which dates have expired. This crushing operation and the large number of product changes created a highly variable flow rate, sugar content, and pH. These large variations caused excursions outside of pretretment permit limits and created operational issues at the local municipal treatment plant.

Project Requirements

  • Design/build of a pretreatment and equalization system to minimize excursions
  • Storage capacity to allow for equalization of the discharge to minimize the impacts to the local municipal treatment plant by creating a 7-day 24-hour constant flow
  • Treatment for pH control and solids removal (fat, oils, greases and suspended solids)

System Components

  • Two 50,000-gallon stainless steel tanks with aeration for equalization
  • Two stage pH adjustment for pH control
  • Coagulation and flocculation to aid in solids removal
  • Dissolved air flotation for solids removal
  • Effluent monitoring with automatic recirculation for out of permit discharges including pH and flow