Determination of Necessary Stack Height (Seattle, WA)
Carried out a Computational Fluid Dynamics (CFD) analysis of air flow patterns between two buildings to determine the minimum stack height necessary to avoid building downwash and impingement of odorous exhaust on the air intakes of the downwind building.

Odor Testing and Control System Design (Monroe, WA)
Conducted source emissions and receptor studies and engineering design for an odor control retrofit to an existing municipal waste water treatment plant. This project required the identification of sources to be controlled, the design of covers and enclosures and layout of the ducting system, and design of a packed bed scrubber. This project also involved the initial installation of a pilot-scale scrubber to define the required gas transfer coefficients for final design. Public attitudes changed from heated complaints to acceptance after initial contacts with the public and installation of the pilot-scale scrubber.

Odor Scrubber Design (Seattle, WA)
Designed a 20,000 cubic feet per minute, cross-flow scrubber to control multiple odors, which required a near-neutral scrubbing liquor first stage and a caustic second stage. Our design alowed recycle of chlorine from the second to the first stage, resulting in reduced operating costs. Capital costs were reduced by locating a used scrubber shell and modifying the design to incorporate available equipment.

Design of Exhaust Ventilation at Manufacturing Facility (Spokane, WA)
Designed an exhaust hood to capture volatile organic chemicals from a manufacturing process and carried out confirmation modeling with CFD to verify acceptable capture efficiency, air flows and pressure drop. Increased capture efficiency allowed expansion of production. Evaluated and recommended a control system to remove the captured chemicals.

Hazardous Waste Burner Design (Ferndale, WA)
Developed and lab tested two alternate designs for burning coke dust. Field tests of the prototypes confirmed the simpler of the two designs would provide satisfactory combustion. Construction drawings were prepared for the burner arrangement and hoppers to hold two day's fuel supply. This system has now been installed in the client's facilities world-wide, saving fuel costs and waste disposal costs.

Blowby Vent Oil Mist Sampler (Spokane, WA)
Developed sampling system to allow measurement and analysis of small quantities of oil in gas turbine oil-blowby vent, allowing design of cost-effective control system.