Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Optimal Procedures for the Processing of Waste Activated Sludge.
Author Randal, Clifford W. ; Parke, David G. ; Rivera-Corder, Antonio ;
CORP Author Virginia Polytechnic Inst. and State Univ., Blacksburg. Water Resources Research Center.
Year Published 1973
Report Number VPI-WRRC-Bull-61; OWRR-A-035-VA; A-035-YA(9),; 13982
Stock Number PB-223 128
Additional Subjects ( Sludge disposal ; Dewatering) ; ( Sewage treatment ; Sludge disposal) ; ( Activated sludge process ; Sludge disposal) ; Optimization ; Anaerobic processes ; Aerobic processes ; Chlorination ; Polymers ; Process variables ; Particle size ;
Library Call Number Additional Info Location Last
NTIS  PB-223 128 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 93p
An extensive study of changes that occur in waste activated sludge when it is processed by commonly used handling procedures and the effect of these changes on subsequent dewatering of the waste sludge is described. The purpose of the study was to identify the types of conditions that make activated sludge more difficult to dewater and to formulate procedures that would optimize dewatering. The principal handling procedures studied were: anaerobic storage, chlorination, aerobic digestion, polymer conditioning, and combinations of these techniques. The effects of operational parameters on the results were also studied. These include solids concentration, temperature, mixing, dissolved oxygen concentration, aeration rate, and digester flow conditions. Dewatering changes were measured by vacuum filterability, specific resistance, and compressibility. Mechanisms of dewaterability change were elucidated. A procedure for measuring floc size was developed. (Modified author abstract)