A.D. PATWARDHAN (Ph.D.) is a consultant (Process Design) to a major industrial firm that undertakes various projects on treatment of domestic sewage and industrial wastes. He has been teaching the course on industrial wastewater treatment to undergraduate and postgraduate students for 18 years as Professor at VJTI, Mumbai, and has designed wastewater treatment plants while working with M/s. Associated Industrial Consultants (Now M/s. Montgomery Watson Harza) for 13 years. He has been in-charge of water, sewage and industrial wastewater treatment plants at Hindustan Antibiotics Ltd. A Fellow of the Institution of Engineers (India) and the Institution of Public Health Engineers, he is Life Member of the Indian Water Works Association, Indian Environmental Association, and Indian Society for Technical Education. He is also a member of Water Environment Federation, USA.