German Version


Dr. - Ing. Johannes Müller

PFI Planungsgemeinschaft Hannover


 Contact Information

 Research Interests


 Organised Conferences and Workshops

 Courses Taught

 Membership in Organisations and Committees


 Publications and Presentations


Contact Information

PFI Planungsgemeinschaft, Karl-Imhoff-Weg 4, 30165 Hannover, Germany
Phone +49/ (0)511-35851-0, Fax -43

Private: Braunschweiger Str. 1, 38197 Schwülper, Germany
Phone +49/ (0)5303/ 6253
E-mail (private):





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Research Interests

Disintegration of sewage sludge

- Comparison of different Methods of mechanical disintegration

- Improvement of anaerobic degradation processes

- Reduction of bulking and foaming sludge by mechanical treatment

- Influences on the dewatering properties of sludge


Comminution of organic material and influence of comminution on bioavailability

- Comminution of organic material

- Influence of comminution on bioavailability




since 07/2003

PFI Planungsgemeinschaft Hannover

09/96 to 06/2003

Assistent lecturer at the Institutes of Mechanical Process Engineering (Prof. Schwedes) and of Sanitary Engineering (Prof. Dichtl) of TU Braunschweig

05/91 - 08/1996

Researcher (Ph.D.-Student) at the Institute of Mechanical Process Engineering of TU Braunschweig at Prof. Dr.-Ing. J. Schwedes, Titel of thesis: Mechanical sewage sludge disintegration

10/83 - 04/1991

Mechanical Engineering degree at the TU Braunschweig, energy and process engineering



Conferences and Workshops

Pre-treatment on Sludge
National Taiwan University, Taipei, Taiwan, 27.03.2001

Conference: Sewage sludge disintegration - Research and application
Braunschweig, March 10./11. 1998

Research-workshop: Sewage sludge disintegration
Braunschweig, March 9./10. 1998

Workshop: Mechanical Cell-disintegration and biological degradation
Braunschweig, March 21./22. 1996



Courses Taught and Advice of Students


Treatment of Industrial Wastewater
TU Braunschweig, since SS (summer semester) 98 (12h/Sem)

Processes of Sewage Sludge Treatment
part-time lectureship University-GH Kassel, SS 98, (20h/Sem)

Drinking Water
part-time lectureship University-GH Kassel, since WS (winter semester) 98/99, (32h/Sem)


Advised Diploma Thesises and Student Research Projects:

List of advised diploma thesises and student research projects (in German)



List of seminars held



Membership in Organisations and Committees

Association of Engineers (VDI) since 1993

- Specialist Group on Environmental Technonogy
  German Association for the Water Environment (ATV) since 1996

- Member of the committee 3.1 "Sludges and Solid Wastes - General Topics"

- Speaker of the working group 3.1.6 "Sewage Sludge Disintegration"
  International Water Association (IWA) (former IAWQ) since 1997

- Specialist Group on Sludge Management and Specialist Group on Anaerobic Digestion



last update: 16/07/2003