![Sample our Geography journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/5937/TOC-Subject-Sample-2021-Geography.jpg"})
Abstract
Sludge filterpressing is the only way to obtain cakes of high solids concentration. To estimate sludge dewaterability the specific resistance to filtration is utilized. However, its evaluation 1s based on the filtration theory, valid for filtrate volume following a parabolic behaviour vs time. For well conditioned sludges this takes a few minutes, while a normal operation lasts hours, and specific resistance values are thus underestimated. Based on laboratory tests, a new way to evaluate the average specific resistance to filtration and the compressibility factor at the filtration time, t, is presented, as a function of polymer dosages and characteristics.