Since 2000 the traditional activated sludge calender of the research center is published. Each year it depicts a different activated sludge organism. In that way we say thanks to our partners, associated persons and friens and wish a "Happy New Year"

Download of Calenders

• Calender 2021
• Calender 2020
• Calender 2019
• Calender 2018
• Calender 2017
• Calender 2016
• Calender 2015
• Calender 2014
• Calender 2013
• Calender 2012
• Calender 2011
• Calender 2010
• Calender 2009
• Calender 2008
• Calender 2007
• Calender 2006
• Calender 2005