Dipl.-Ing. Gunter Lehne, Dr.-Ing. Johannes Müller
Institute of Mechanical Process Engineering, Post Box 3329, Technical
University of Braunschweig, D-38106 Braunschweig, Germany
Abstract:
The Mechanical disintegration
of sewage sludge was investigated using different ultrasonic homogenizers. The
influence of a mechanical disintegration on the particle size was investigated.
The particle size analyse can not describe the cell disruption and the release
of organic material to the sludge water. Two biochemical methods were developed
for these phenomena. One of the parameters provides information about the
disruption of micro-organisms the other one gives information about the release
of organic material. The influence of the energy intensity on the
disintegration of excess sludge was investigated. Further investigations had to
detect the influence of the solid content on the disintegration results. For
sludge with a higher solid content better results in terms of energy
consumption could be achieved. A comparison of the results of different methods
of sludge disintegration shows that the investigated ultrasonic homogenizers
are inferior to a high pressure homogenizer and a stirred ball mill in terms of
energy consumption.
Origin:
G. Lehne, J. Müller (1999). The influence of
energy consumption on the sewage sludge disintegration, in: Tiehm, A.,
Neis, U. (ed.) Ultrasound in Environmental Engineering, TU Hamburg- Harburg
Reports on Sanitary Engineering 25, GFEU- Verlag, pp. 205-215, ISBN
3-930400-23-5