Bernhard, Senge; Dieter, Christoph
Sugar factories produce 5-8 kg/100 kg beet of carbonatation sludge. Depending on the filtering plant, this sludge occurs as a fluid system (£ 60% dry substance) or in solid form. The studies reported here serve to characterize the flow behaviour of this waste product as a plastic non-Newtonian medium. The paper describes the theoretical principles of rheology, the conduct of the measurements and evaluation of the experiments. Flow curves for dry substance contents of 50%, 55% and 60% in a temperature range of 20 to 70 °C were established. Sludge throughput equations were derived for ranges of practical importance and a transport optimization exercise conducted for what can also be described as a Cassonian medium. The indicated method of analysis can also be applied in modified form to the hydraulic transport of sludge from settling tanks.
pdf download: 1995-209-217.pdf