Largest Biowall in U.S. Comes to Life

摘要

A22-foot-wide, 80-foot-tal! biowall stands at the heart of Drexel University's Papadakis Integrated Sciences Building. Drexel's biowall is North America's largest living biofilter and the only such structure installed at a U.S. university. It consists of over 12 varieties of tropical plants that grow in the absence of soil. The plant roots are embedded between two layers of porous material. Water is recircu-lated between these layers to provide plant roots with nutrients and hydration. The wall uses the natural respiratory properties of plants to cool the indoor air in the summer and function like a humidifier in the winter.