Drexel's New Science Center Features Nation's Largest Biowall

PHILADELPHIA (CBS) - When Drexel University dedicates its new science building this afternoon, it will also show off one of its most-stunning new features, the nation's largest biowall.

The new building at 33rd and Chestnut is named for the late, visionary Drexel President Constantine Papadakis and the center of its atrium is a five story hydroponic planter, with things like rubber trees and ivy with their roots in water.

Biology Professor Aleister Saunders says building air is recycled through this living wall for filtration, "It's the microbes in the roots of the plants that break down the bad chemicals that are in all indoor air situations, so unlike that filter that still has volatile organic compounds, carcinogens, in it (you have to dispose of that) the biowall, the microbes actually, break down those compounds into carbon dioxide and water."

Another advantage is that regular HVAC systems use outside air to dilute indoor pollution.  That air has to be heated or cooled, depending on the season.  This is already at the proper temperature, saving money.

Reported by John Ostapkovich, KYW Newsradio 1060