Novel cake characteristics of waste-activated sludge.
Breaking down the time limit constraints for conventional compression-permeation (C-P) cell test, this work has, for the first time, experimentally evaluated the cake characteristics of viable waste-activated sludge subject to polyelectrolyte flocculation and to freeze/thaw treatment under a pressure range of 25-200 kPa. There exists a threshold pressure exceeding which the cake structure would significantly deteriorate. Also, the present biological sludge is a "super-compactible" sludge, whose compactibility is greater than most data ever reported in open literature. The information presented herein has implications to filter design/operation and can be used as a reference data set for examining the existing filtration theories.
Wu
R M
RM
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan ROC.
Lee
D J
DJ
Wang
C H
CH
Chen
J P
JP
Tan
R B
RB
D001419:Bacteria; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation / Q000379:methods; D005615:Freezing; D012722:Sewage / Q000737:chemistry*; D014871:Water Microbiology; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D012722:Sewage