Investigations on sludge dewatering with the separation analyser LUMiFuge 114
T. Sobisch, D. Lerche¹; 3rd International Conference of the Kolloidgesellschaft e.V. Budapest 25 – 28 September 2000.
Abstract: Sludge dewatering is an import step in wastewater treatment, which has a serious impact on the effectiveness and cost of the hole treatment process. Utilization of flocculants for sludge conditioning allows the application of high performance dewatering machines, such as high pressure filter presses and decanters. Practical application studies of the sludge dewatering process and its control by flocculant addition require adequate laboratory methods. At present numerous methods are used on laboratory scale, however, they are generally time-consuming and often lack practical relevance. The application of a newly developed separation analyser for rapid evaluation of sludge properties and for the selection of efficient additives for sludge dewatering in decanter centrifuges is reported. The separation analyser is based on a special centrifuge with an integrated optoelectronic sensor system which allows to trace the local and temporal changes of light transmission during rotation. Up to eight samples can be investigated simultaneously. A centrifugal acceleration in the range of 12 to 1200 g is used to speed up the separation process, thereby reducing the time necessary for investigation.
Key words: Polyelectrolyte stabilization • Dispersion stability • Silica • Centrifugation • Adsorption
¹ LUM GmbH, Rudower Chaussee 29, 12489 Berlin, Germany.Contact us
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