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Nutrient management control regulation and preparedness of a northern Colorado wastewater treatment plant

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dc.contributor.authorVenkatapathi, Keerthivasan, author
dc.contributor.authorOmur-Ozbek, Pinar, advisor
dc.contributor.authorCarlson, Kenneth, committee member
dc.contributor.authorReardon, Kenneth, committee member
dc.date.accessioned2007-01-03T05:57:03Z
dc.date.available2014-09-30T05:57:00Z
dc.date.issued2013
dc.description.abstractExcessive nutrients in wastewater treatment plant (WWTP) effluents instigate eutrophication of receiving water bodies. Colorado Department of Public Health and Environment (CDPHE) adopted nutrient management control regulation, also known as regulation 85, to moderate the nutrients released by point sources such as the WWTP effluents. City of Loveland WWTP was selected as the study plant to determine a new treatment process configuration to meet the new limits of total phosphorus < 1 mg/L and total inorganic nitrogen < 15 mg/L in the effluent. BioWin, a windows based modeling software, was used to model and simulate the City of Loveland WWTP. Existing activated sludge step feed process configuration was modeled along with proposed anaerobic, anoxic, oxic (A2O) process for design influent flow of 10 MGD and 5-stage Bardenpho process for future flow of 12 MGD along with A2O process. Existing configuration was modeled to establish the accuracy of BioWin. 5 stage Bardenpho process modeling indicates that higher design HRT of 2 days for anaerobic, 4 days for anoxic, 6 days for aerobic, 4 days for secondary anoxic and 1 day for reaeration has better treatment removal efficiency for nutrients with methanol dosage of 250 gal/d and 1Q internal recycle. Model simulations for A2O process reveals that aerobic reactor to anaerobic reactor volume ratios from 3 to 4 and aerobic reactor to anoxic reactor volume ratio of 2.2 along with internal recycle of 1Q has the better nutrient removal efficiency for design flow of 10 MGD. For 12 MGD influent flow, volume of reactors was increased by 20% to compensate for 20% increase in the flow. Previously mentioned reactor volume ratios are feasible for 12 MGD influent flow with volume ratios of 3 and 4 for aerobic to anaerobic reactors and volume ratios of 1.8 and 2 for aerobic to anoxic reactors. Modeling results indicates that increasing the reactor volume ratio for increased flow can result in better treatment for removal of nutrients with a conservative volume, reducing the operational and maintenance cost.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierVenkatapathi_colostate_0053N_11765.pdf
dc.identifierETDF2013500273CVEE
dc.identifier.urihttp://hdl.handle.net/10217/80334
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationwwdl
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectwastewater
dc.subjectBioWin modeling
dc.titleNutrient management control regulation and preparedness of a northern Colorado wastewater treatment plant
dc.typeText
dcterms.embargo.expires2014-09-30
dcterms.embargo.terms2014-09-30
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineCivil and Environmental Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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