In the introductory session, prof. Oleszkiewicz will give a special lecture on “Sustainable wastewater treatment compatible with new regulations”. The lecture will be followed by a presentation on “Transformations in wastewater management in Poland in the last 25 years – from the outsider to the leader”. The next session will comprise a series of keynote presentations on innovations in biological nutrient removal and recovery (North-American and European perspective) as well as case studies from large wastewater treatment plants in Eastern Europe (including Poznan WWTP).