Sludge conditioning, thickening and dewatering optimization in a screw centrifuge decanter


Centrifuge are common machines used for sludge thickening and dewatering in wastewater treatment plant but performances and optimal setting parameters are often difficult to predict and optimize, owing to complex mechanisms occurring during separation and high shear stresses undergone by flocs. Laboratory tests are necessary to assess performances and to screen chemicals and dosage in order to decrease optimization time at full scale. They include volatile matters characterization, drainage and CST tests vs mixing time, basket spin tests with shearing, limit dryness determination. The ability of these tests, to assess sludge dehydration and/or to select polymer and dosage, is discussed and is compared with performances obtained in a screw centrifuge decanter at lab and full scale.

Technical Parameter of LW760  thickening and dewatering Decanter centrifuge from Shenzhou Group:

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