Sludge settling characterization with an automated settlometer
1997
Vanderhasselt, A. | Gernaey, K. | Verstraete, W. (Universiteit Gent (Belgium). Lab. for Microbial Ecology and Technology) | Vanrolleghem, P. | Laurier, D.
An automated sensor for measuring sludge settling properties is presented. In this sensor the evolution of the sludge water interface is followed during a 35 minutes batch settling experiment. This sensor can be used for lab research as well as for on-line monitoring of the settling characteristics of activated sludge on a full scale waste water treatment plant. By means of lab experiments the effect of different concentrations of additives on the sludge settling properties are evaluated. In addition to the evaluation of the direct positive effect of the additive, a method is proposed to study the stability of the beneficial effect of the additive. The information obtained can be a useful tool when one is looking for the economically most interesting additive to use in a specific case of sludge settling problems. For full-scale applications the sensor can be used to screen for operational parameters that have an effect on the settling characteristics of the sludge. Thus the waste water treatment plant can be tuned towards operating conditions that ameliorate the settling characteristics of the sludge.
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