James EdzwaldJames K Edzwald is Professor Emeritus, Civil and Environmental Engineering, the University of Massachusetts and former Director of the Institute in Drinking Water Treatment. He is the Editor of Water Treatment Plant Design, Fifth Editio. Mr. Edzwald was the Program Chair of the International Conference on Flotation in Water and Wastewater - September 2007, Seoul, South Korea. Johannes Haarhoff is Professor of Civil Engineering Science at the University of Johannesburg. He developed the Water Research Group, a center of excellence at the University for applied research in water treatment. Read More Read Less