24.03.2021: Nature-based solutions for sustainable wastewater management in the new circular economy paradigm

M.Sc. Ph.D. Alexandros Stefanakis, Assistant Professor of Water and Wastewater Treatment Processes

While our modern global society enjoys the benefits of an economic growth that was never seen before, it is facing at the same time the existential threat of climate change. We realize now that the linear economic model cannot sustain our live standards indefinitely. A new circular approach is already in discussion and suggests the adjustment of our priorities and re-orienting future infrastructure investments. In this context, we look back to nature to find the solutions we need to increase the resiliency of our cities, to protect and restore the ecosystems and to maintain the necessary economic growth without further undermining the planet’s boundaries. Nature-based solutions (NBS) serve exactly this ambitious and multi-factorial purpose due to their inherent ability not only to tackle climate change but also to provide a series of ecosystems services and social benefits such as regulation of micro-climates, flood prevention, water treatment, food provision and more. This presentation will introduce the concept of NBS in water and wastewater management, discuss the various benefits of these systems and show several NBS examples and case studies from different parts of the world.

 

 

 

Dr Stefanakis is Assistant Professor at the School of Environmental Engineering, Technical University of Crete in Greece. He is also Regional Coordinator for Africa and Middle East (Management Committee) for the ‘Wetlands for Water Pollution Control’ Specialist Group of the International Water Association. He is Editor-in-Chief of the Springer journal ‘Circular Economy and Sustainability’. He holds the diploma of Environmental Engineer from the Democritus University of Thrace, and MSc from the Department of Civil Engineering. His PhD focused on ecological engineering and technology and the use of natural treatment systems for wastewater treatment. As a Researcher he focuses on water engineering and specifically on nature-based solutions while he studies the transition to a circular economy. He is an Expert on sustainable and decentralized water and wastewater treatment systems has designed and constructed several wastewater treatment facilities across Europe, Middle East, Africa, USA and South America. In the past, he worked as Researcher and Lecturer at the University of Brighton in the UK, the University of Beira Interior in Portugal, the Helmholtz Center for Environmental Research – UFZ in Germany, and the Democritus University of Thrace in Greece. He was also employed as Tender Manager and Wetlands Expert by the multinational environmental company Bauer. His publication record includes articles in international scientific journals and conference proceedings, as well as three books and several book chapters. He is known in the related international field as an enthusiast of green technologies for water management and reuse, always trying to promote and disseminate such technologies and transfer his knowledge to young engineers and students.

17.03.2021: Ressourcen- und Energieeffizienz beim Recycling von Metallen

Univ.-Prof. Dipl.-Ing. Dr.mont. Helmut Antrekowitsch, Universitätsprofessor für Nichteisenmetallurgie

Die EU hat 2015 ein ehrgeiziges Maßnahmenpaket zur Kreislaufwirtschaft verabschiedet, um die Materialkreisläufe zu schließen und gleichzeitig damit die globale Wettbewerbsfähigkeit zu steigern. Mit Hilfe einer geeigneten stofflichen und thermischen Verwertung von sekundären Materialien (Schrotte, metallhaltige Reststoffe, Kunststoffe, Baustoffe usw.) ist es nicht nur möglich strategische Rohstoffabhängigkeiten zu verringern, sondern es wird dadurch auch ein wichtiger Beitrag zum Klima- sowie Umweltschutz geleistet, wobei Metalle in diesem Zusammenhang eine außerordentlich wichtige Rolle spielen.

Im Rahmen des Vortrages wird die besonders wichtige Vernetzung der Themen Rohstoffe, primäre Gewinnung, Recycling und nachhaltige Werkstofftechnik auf dem Gebiet der Metalle näher erläutert. Nur durch die Kombination dieser Bereiche ist sowohl die notwendige Rohstoffversorgung als auch ein gezielter Klima- und Umweltschutz zukünftig gegeben. In diesem Zusammenhang werden auch die Einsatzgebiete von Metallen und Metallverbindungen in nachhaltigen Anwendungen (Windkraft, Photovoltaik, E-Mobilität, Abgasreinigung usw.) besprochen und im Gesamtkontext dargestellt. 

 

Helmut Antrekowitsch studierte Metallurgie an der Montanuniversität Leoben und promovierte am Institut für Nichteisenmetallurgie. Im Jahr 2003 habilitierte er sich für das Fachgebiet Metallurgie der Nichteisenmetalle. Von 2002 bis 2009 leitete er das Christian-Doppler-Labor für Sekundärmetallurgie der Nichteisenmetalle. Seit 2010 ist er Leiter des Lehrstuhls für Nichteisenmetalle und beschäftigt sich intensiv mit dem Recycling von Metallen und metallhaltigen Reststoffen.