Sludge sedimentation experiments with

Sedimentation Experiments with Digested Sludges. Sedimentation experiments were made to observe the settling behavior after dilution... 

Tall Column Results. The results of four sedimentation experiments with the tall column are shown in Figures 11-14. All experiments were done at the same dilution (100 1), with samples taken at different depths and the water surface level recorded prior to taking each sample. Great differences in sedimentation velocity between ports were not observed, but the deeper port consistently showed faster sedimentation velocities, a strong indication of possible flocculation. A comparison of results for the shallow- and tail-column experiments with LACSD sludge shows essentially the same sedimentation-velocity curves at the 100 1 dilution. 

Laboratory and full scale experiments have been made with activated and digested sludge from the Central Waste-Water Treatment Plant in Prague. Laboratory experiments in a steel pipe of 32 mm diameter and full scale experiments were performed in a cast iron pipe of diameter 250 mm used for sludge transport from the Prague Central Plant to the sedimentation fields, Fig. 2, when maximum drag reduction was 15 - 20 %... 

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