Method of and Apparatus for Determination and Adjustment of the Optimum Dose of Coagulation Agents in Coagulation Processes.

摘要

1,171,800. Filtering and settling; mixing flowing liquids. CESKOSLOVENSKA AKADEMIE VED. 28 Dec., 1967 [6 Jan., 1967], No. 58785/67. Headings B1C and BID. [Also in Divisions Cl and G3] In Fig. 2a, liquid treated with a coagulating agent is supplied through a conduit 7 to zone A of a circular tank 1 and coagulated particles form a sludge blanket in a zone B. Above zone B clarified liquid C overflows into an outlet conduit 8 and sludge spilling over into a sedimentation zone D passes off through a conduit 9. The streaming potential derived from electrodes 2, 3 on each side of the sludge blanket in the direction of flow periodically controls the dosage of coagulating agent to maintain optimum conditions. Control in dependence on conductivity, rate of flow and/or concentration may be added. Applications involving a sedimentation tank or a solid filter bed with electrodes one above the other are described.