Pii: S0043-1354(00)00513-3
نویسندگان
چکیده
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 wasteactivated 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. # 2001 Elsevier Science Ltd. All rights reserved Key words}compression-permeability cell, porosity, specific resistance, yield stress
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