This on-demand video, presented by the Water Research Foundation in July 2009, covers the use of biological filtration and focuses on the engineering and operation of such filters from a national perspective. The presentation highlights results from two ESTCP-funded projects showing survey results on the barriers to the acceptance and use of biological drinking water treatment and anaerobic applications for biological filtration, respectively. The archived on-demand video, with audio, can be viewed by clicking on the following links:

• Biological Filtration Part 1 - Introduction
• Biological Filtration Part 2 - History and State of the Science
• Biological Filtration Part 3 - Biological Drinking Water Treatment National Survey
• Biological Filtration Part 4 - Anoxic / Anaerobic Applications of Biofiltration