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Many of the services we offer
Baseline Environmental Assessments
Environmental Site Assessments
Industrial Wastewater Treatment
A few examples of our work

Rhone-Poulenc AI Company
Aerobic Digestion System

Client
Rhone-Poulenc AI Company
Institute, West Virginia

Situation
The objective of the project was to minimize odors and reduce sludge management costs.

SolutionAerobic Digestion System
Based on preliminary engineering evaluations including bench scale laboratory studies, Rose & Westra, Inc. (R&W) found that an Auto Thermal Aerobic Digestion (ATAD) unit would be effective in reducing odors, sludge volume, and sludge management costs. The ATAD system was designed by R&W utilizing waste oxygen generated at the chemical manufacturing facility. The system design included a 330,000 gallon tank with a pure oxygen in-situ aerator similar to the Praxair® ISO. The new system was designed for a waste activated sludge stream of 8,000 lbs (dry weight) per day.

The following benefits were derived from the new system :

  • Reduced odors in the area of the treatment plant.
  • Reduced odors at the landfill.
  • A 40% reduction in solids and disposal.
  • Reduced operating costs.

Project Schedule
Six month schedule, including design and construction, following authorization to proceed.


4328 Three Mile Rd. NW · Grand Rapids, MI 49544
Phone (616)791-7100 · Fax (616)791-9263
Email

Last Update: 07/11/03