Record Display for the EPA National Library Catalog

RECORD NUMBER: 355 OF 751

OLS Field Name OLS Field Data
Main Title Investigation of the Use of High Purity Oxygen Aeration in the Conventional Activated Sludge Process.
Author Albertsso, J. G. ; McWhirte, J. R. ; Robinso, E. K. ; Vahldiec, N. P. ;
CORP Author Union Carbide Corp., Tonawanda, N.Y. Linde Div.
Year Published 1970
Report Number FWQA-17050-DNW; 09833,; 17050-DNW-5/70
Stock Number PB-194 241
Additional Subjects ( Activated sludge process ; Aeration) ; ( Sewage treatment ; Activated sludge process) ; Oxygen ; Biochemical oxygen demand ; Oxygenation ; Cost estimates ; Plant layout ; Air ; Biomass ; Maintenance ; Sludge disposal ; Aerators ; Waste water treatment
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-194 241 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 198p
Abstract
A full scale system designed to demonstrate the practical and economical use of high purity oxygen gas in aeration of the conventional activated sludge waste treatment process was tested under a variety of operating conditions in a direct performance comparison with a parallel air aerated system. A sparged-turbine, gas-liquid contacting unit was employed in covered tanks of conventional design with liquid and gas staging for cocurrent flow of each phase. This oxygenation system required very low power input for oxygen transfer and liquid mixing. The oxygenation system could operate with MLVSS concentrations of as high as 4500 mg/liter achieving about 90% BOD removals at aeration detention times as low as 1.2 hours (raw flow + recycle flow) treating domestic waste of 220 mg/liter BOD. Biomass from the oxygenation system is highly flocculent and readily settleable with desirable handling characteristics. Recycle and waste activated sludge suspended solids concentrations of about 3% were achieved. Process advantages recognized with the oxygenation system indicate significant reductions in secondary waste treatment costs in comparison to conventional diffused air aerated systems. (WRSIC abstract)