Full-scale demonstration of open tank oxygen activated sludge treatment

by Stephen R. Pearlman in Cincinnati, Ohio: Environmental Protection Agency, Office of Research and Development, [Office of Air, Land, and Water Use], Municipal Environmental Research Laboratory, Springfield, Va. : for sale by the National Technical Information Technical Service

Written in English
Published: Pages: 118 Downloads: 389
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Subjects:

  • Sewage -- Purification -- Activated sludge process.

Edition Notes

Full-scale demonstration of open tank oxygen activated sludge treatment by Stephen R. Pearlman Download PDF EPUB FB2

ABSTRACT This report presents an operating summary of a full-scale demonstration of the FMC open tank pure oxygen (FMC 02) activated sludge system, conducted at the facilities of the Metropolitan Denver Sewage Disposal District No. 1 (Metro) in Denver, Colorado. Full-scale demonstration of open tank oxygen activated sludge treatment.

Cincinnati, Ohio: Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Springfield, Va.: Available to the public through National Technical Information Services [distributor], (OCoLC) The follow-on, full-scale demonstration project used a rotating active diffuser, which in general required less power than the fixed active diffuser used in this project.

The rotating active diffuser has supplanted the fixed active diffuser as the standard oxygen transfer device in the MAROX open tank oxygen system.

Approximately % of the activated sludge tank volume is kept anoxic - and the rest oxic to ensure degradation of excess carbon source and to improve effluent quality.

Due to fluctuations in the wastewater composition, carbon source (ethanol) is added to reach full Size: KB. Part of the sludge was directed via the worm reactor (stream 0) to the sludge tank (stream 1).

Another part was directly fed to the anaerobic tank sludge tank via a bypass stream designated 0b. Download: Download high-res image (KB) Download: Download full-size image; Fig.

Schematic diagram of worm reactor set-up, system boundaries for Cited by: The granular sludge allows for a compact treatment process, which is reflected in the volumes of the existing old conventional plant, treating 59% of the sewage in 28, m 3 of activated sludge tanks p m 3 of clarifiers, while the AGS reactors treats 41% of the sewage in 19, m 3 tanks plus 4, m 3 of rainwater by: Wastewater treatment plants are known to utilize excessive amounts of air in activated sludge tanks in order to maintain sufficient growth of biomass and proper mixing.