DEVELOPMENT OF WASTEWATER MANAGEMENT 1850 1950 2000 2050 Sanitary Engineering Environmental Engineering Water Environm. Management Hygiene in focus Pollution control in focus Water reuse in focus Cholera epidemic 1850. Secondary treatm., 1950. Growth limited by water Chlorination, 1900 P-removal, 1970 Extensive ww treatment Wastewater collection. Reuse for crop irrigation Reuse of ww for irrigation Sewage farms N-removal 1990 Urban water reuse Primary treatment Sludge on farmland Productification of sludge Deep-sea outfalls · Alternativ systems-reuse· Utilisation of ww heat Water use- supply driven Water use -demond driven NINU- Norwegian University of Science and Technology Prof Hallvard Odegaard Dep Hydraulic and Environmental EngineeringNTNU - Norwegian University of Science and Technology Dep. Hydraulic and Environmental Engineering Prof. Hallvard Ødegaard DEVELOPMENT OF WASTEWATER MANAGEMENT 1850 1950 2000 2050 Sanitary Engineering Environmental Engineering Water Environm. Management Hygiene in focus Pollution control in focus Water reuse in focus • Cholera epidemic 1850 • Chlorination, 1900 • Wastewater collection • Sewage farms • Primary treatment • Deep-sea outfalls • Secondary treatm., 1950 • P-removal, 1970 • Reuse for crop irrigation • N-removal, 1990 • Sludge on farmland • Alternativ systems-reuse • Growth limited by water • Extensive ww treatment • Reuse of ww for irrigation • Urban water reuse • Productification of sludge • Utilisation of ww heat Water use — supply driven Water use — demond driven