1885 - Combined sewers
1888 – Central water supply
1905 – First sewage treatment plant
1945 – Planning and design
1949 – Primary treatment
1957 – Biological sewage treatment
1964 – Primary and biological treatment
1967 – Sludge dewatering
1972 – Digestion tank
1975 – Three polishing ponds
1976 – Sewage treatment
1978 – Excess sludge thickening
1989 – Start-up of third treatment stage
1992 – Combined heat and power station
1993 to 1996 – Biological treatment 3
September 1996 - Inauguration
1998 to 1999 – Better maintenance
2000 – New grit chambers
2002 – New screening building
January 2001
July 2001
July 2003
October 2004
March 2006 – New sludge dewatering facility
2008 – Remodeling ventilation System
2012 – Conversion central control station with new process control system
2013 – Renewal of the Combined heat and power station in container construction
2015 – Installation of turbo compressors
2016 – "Energy neutral sewage Treatment Plant Kaiserslautern" award
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