Conferences ORBIT-97, Biological Waste Treatment, Into The Next Millennium, Harrogate, UK ORBIT-99, Biological Treatment of Waste and the Environment, Weimar, Germany ORBIT 2001,Biological Processing of Waste; a Product-oriented Perspective, Sevilla, Spain ORBIT 2003, Perth, Australia ORBIT 2006, Biological Waste Management - From Local to Global, Weimar, Germany ORBIT 2008, Moving Organic Waste Recycling towards Resource Management and for the Biobased Economy, Wageningen, Netherlands Special Events ORBIT 2009 , Biomass and Organic Waste as Sustainable Resources, Beijing, China Luxembourg 2005, The Future of Residual Waste Management in Europe - Future Challenges Regarding Climate Change and Sustainable Material Flow Management, Luxembourg Maastricht 2003, ECN Workshop Aschaffenburg 2003, ECN Workshop Udine 2002, Sustainable Management of Solid Organic Waste, Udine Italy, Gödölö 2002 ,Innovative Biotechnologien der Abfallwirtschaft, Rahmenbedingungen der EU und der EU- Beitrittskandidaten, Gödöllö, Ungarn Wolfsburg 2002, Biodegradable Polymers: Production, Marketing, Utilisation, and Residue Management, Wolfsburg, Germany