Assessment of Sludge Dewaterability Using Rheological Properties
Resource
Journal of the Chinese Institute of Engineers 26 (2): 221-226
Journal
Journal of the Chinese Institute of Engineers
Journal Volume
26
Journal Issue
2
Pages
221-226
Date Issued
2003
Date
2003
Author(s)
Li, Kung-Cheh
Abstract
This study evaluates the feasibility of using rheological properties to assess the dewaterability of sludge. Inorganic water sludge and organic activated sludge were conditioned with fly ash and polymer. The rheological characteristics of conditioned sludge, such as sludge viscosity and rheogram, in addition to capillary suction time (CST) and specific resistance to filtration (SRF) were determined. Experimental results indicate that the sludge viscosity and rheogram peak can be used to assess inorganic water sludge dewaterability, but not that of organic activated sludge. Selecting proper rheological parameters for sludge conditioning control depends on sludge types and conditioning methods. The minimum sludge viscosity of inorganic water sludge conditioned with fly ash corresponded to the minimum CST and SRF. Additionally, the specific height of the rheogram peak is an alternative means to determine the best point of coagulation for inorganic water sludge conditioned with polymer. © 2003, Taylor & Francis Group, LLC.
Subjects
Fly ash and polymer; Rheology; Sludge conditioning; Sludge dewaterability
SDGs
Other Subjects
Compressibility; Dewatering; Fly ash; Organic polymers; Rheology; Viscosity; Volatile organic compounds; Water; Capillary suction time; Inorganic water sludge; Organic activated sludge; Sludge dewaterability; Specific resistance to filtration; Sewage sludge
Type
journal article
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