The Problem:

CO concentrations in the enclosed loading dock of the VA Hospital were above acceptable levels.

During a 10-day analysis (prior to the installation of a bioreactor), several ultra-large peaks of CO (hundreds of parts per million) and one peak of >800 ppm CO were observed as trucks came into the area to unload. Further, the number of times the CO level exceeded 1 ppm was far too high. Additionally, the odors created in the loading area were drawn into the waiting area of the hospital.

The Solution:

A bioreactor was installed at the loading dock.

• After the bioreactor installation, there were no ultra-large peaks of CO recorded.

• There was an 80% reduction in the CO levels above 1 ppm.

The VA found this to be “highly statistically significant.”

VA Conclusion:

“The most effective measure was the introduction of a novel air-cleaning technology, which is capable of reducing organic contaminants by oxidation to carbon dioxide and water on a continuous basis.”

“Perhaps even more significant is the comments and impressions of employees working in the area who find the air quality substantially improved, with a noted reduction in odors and respiratory problems.”

Immobilized-Cell Technology Benefits (Sidebar)

• Is portable

• Eliminates channeling and plugging

• Operates at room temperature

• Remarkably long life

• Exceptional resistances to contamination

• Self-replenishing

• High biomass densities

Air enters the space between the biosupport sheets and exits, without going through a filter.

Winner of Technology Innovation Award