Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/27122
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dc.contributor.authorZappi, Mark E.-
dc.contributor.authorMorgan, Robert T.-
dc.contributor.authorMiller, M. Todd-
dc.contributor.authorQasim, Mohammad-
dc.date.accessioned2018-05-18T17:03:00Z-
dc.date.available2018-05-18T17:03:00Z-
dc.date.issued1994-08-
dc.identifier.govdocMiscellaneous Paper EL-94-8-
dc.identifier.urihttp://hdl.handle.net/11681/27122-
dc.descriptionMiscellaneous Paper-
dc.description.abstractThe Department of Defense has over 12,000 sites that are contaminated from past military activities. Many sites contain volatile organic contaminants that may be treated using aboveground or in situ aerobic biotreatment systems. Three oxygen sources for activated sludge were evaluated using 3-ℓ chemostats treating amended groundwater containing over 200 mg/ℓ benzene. The oxygen sources were compared based on percent contaminant removal, reduction of benzene off-gassing, and biomass stability. The fate of hydrogen peroxide in an activated sludge system was evaluated and described using an equation that determines steady-state hydrogen peroxide concentration. The equation is essentially a simple fate model that includes input, output, and both biotic and abiotic terms. The results indicated that peroxide could be used as an alternative oxygen source with no release of benzene into the ambient air; however, this approach was found to be expensive because of the high cost of hydrogen peroxide. Benzene was removed from the groundwater to .below detection levels. Pure oxygen sparging was a particularly attractive means of introducing oxygen with minimal stripping of benzene. Biotic reactions dominated hydrogen peroxide fate within an activated sludge system. The reaction between hydrogen peroxide and biomass was second order overall and first order with respect to both reactants.en_US
dc.description.sponsorshipIn-House Laboratory Independent Research Program (U.S.)en_US
dc.description.sponsorshipUnited States. Assistant Secretary of the Army (R & D)-
dc.format.extent100 pages/5.031 Mb-
dc.format.mediumPDF/A-
dc.language.isoenen_US
dc.publisherEnvironmental Laboratory (U.S.)en_US
dc.publisherU.S. Army Engineer Waterways Experiment Station.en_US
dc.relation.ispartofseriesMiscellaneous Paper (U.S. Army Engineer Waterways Experiment Station.) ; EL-94-8-
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectWater--Purification--Biological treatmenten_US
dc.subjectBenzene--Biodegradationen_US
dc.subjectBioreactorsen_US
dc.subjectSewage--Purification--Activated sludge processen_US
dc.titleDevelopment of a zero-headspace aerobic suspended growth bioreactoren_US
dc.typeReporten_US
Appears in Collections:Miscellaneous Paper

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