Denitrification in onsite wastewater treatment and disposal systems

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dc.contributor.authorDegen, Marcia B.en
dc.contributor.authorReneau, Raymond B.en
dc.contributor.authorHagedorn, Charles IIIen
dc.contributor.authorMartens, David C.en
dc.contributor.departmentVirginia Water Resources Research Centeren
dc.date.accessioned2014-03-15T17:14:48Zen
dc.date.available2014-03-15T17:14:48Zen
dc.date.issued1991-11en
dc.description.abstractThe effects of effluent type, effluent loading rate, dosing interval, and temperature on denitrification in onsite wastewater treatment and disposal systems (OSWTDSs) were evaluated in this study. The variables were soil horizon, effluent type, effluent loading rate, dosing interval, and temperature. Surface and subsurface soil cores were collected from a Groseclose silt loam soil (clayey, mixed, mesic Typic Hapludult) and subjected to the following treatments: aerobic and anaerobic effluent, loading rates of 0.5, 1.0, and 1.5 times the Virginia Department of Health (VDH)-recommended levels, 24-hour and 48-hour dosing rates, and summer and winter temperatures. The effects of the treatments on denitrification were evaluated based on analyses of leachate from the cores, soil chemical analyses, and microcosm studies to estimate actual denitrification activity. From the study, a model was developed that predicted the mean nitrous oxide (N20) production for each combination of the experimental treatments. The results of the study and the model indicate that denitrification can be enhanced in OSWTDSs by the application of anaerobic effluent at the VDH-recommended effluent loading rate to surface soil horizons using a 48-hour dosing interval. A field study was conducted on a Lowell silt loam soil (fine, mixed, mesic Typic Hapludalf). Denitrification was measured at this site using acetylene blocking, and the results compared to those predicted by the denitrification model developed from the laboratory data. The field measurements of denitrification based on N20 concentration in the soil atmosphere were almost three orders of magnitude higher than that predicted by the model.en
dc.format.extentxii, 113 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.oclc25168401en
dc.identifier.urihttp://hdl.handle.net/10919/46613en
dc.language.isoen_USen
dc.publisherVirginia Water Resources Research Center, Virginia Polytechnic Institute and State Universityen
dc.relation.ispartofseriesBulletin (Virginia Water Resources Research Center) ; 171en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccTD201 .V57en
dc.subject.lcshSewage -- Purification -- Nitrogen removalen
dc.titleDenitrification in onsite wastewater treatment and disposal systemsen
dc.typeReporten
dc.type.dcmitypeTexten

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