Preface. Acknowledgments. Contributors. Part 1: Principles. 1. Fundamentals or air pollution. 2. Non-biological treatment technologies. 3. Conventional Biofilters. 4. Biotrickling filters. 5. Bioscrubbers. 6. Membrane bioreactors. 7. Combined advanced oxidation and biodegradation. 8. Rotating biological contactors. 9. Activated sludge and suspended growth bioreactors. Part 2: Applications. 10. Biofiltration of waste gases from a dairy industry. 11. Treatment of high VOC levels in a closed biofilter. 12. New bioreactor system for treating sulphur- or nitrogencompounds. 13. Bioscrubber for treating waste gases from wastewater treatment plants. 14. Odour control at waste water treatment plants by diffusion into activated sludge basins. Index.