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Bioremediation of low-permeability, pentachlorophenol-contaminated soil by laboratory and full-scale processes

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dc.contributor.advisor Woods, Sandra L.
dc.creator Havighorst, Mark B.
dc.date.accessioned 2012-10-02T17:41:22Z
dc.date.available 2012-10-02T17:41:22Z
dc.date.copyright 1998-01-30
dc.date.issued 1998-01-30
dc.identifier.uri http://hdl.handle.net/1957/34057
dc.description Graduation date: 1998 en_US
dc.description.abstract Ex-situ bioremediation of saturated soil contaminated with pentachlorophenol and 2,3,5,6-TeCP is commonly accomplished by landfarming or by treatment in a bioreactor. Treating saturated, low-permeability soils in bioreactors, without pre-treatment requires a reactor capable of promoting anaerobic and/or aerobic removal of chlorophenols without transferring these contaminants to the aqueous phase. A pilot-scale bioreactor was designed to treat 3.7 cubic meters of contaminated soil with a saturated hydraulic conductivity of 0.12 cm/day. The bioreactor demonstrated significant removal of chlorophenols when soil was infused with a treatment mixture containing imitation vanilla flavoring as an electron donor for reductive dechlorination and primary substrate for aerobic cometabolism. Bench scale studies showed greater overall removal when feed mixtures included an inoculated biomass, or when treatment mixtures were maintained anaerobically prior to use. The combined results of these studies suggest that concentrations of pentachlorophenol and 2,3,5,6-TeCP in soil can be significantly reduced using fill and draw batch reactors, operated for three to five week long cycles, using a variety of treatment mixtures. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Pentachlorophenol -- Biodegradation en_US
dc.subject.lcsh Soil remediation en_US
dc.title Bioremediation of low-permeability, pentachlorophenol-contaminated soil by laboratory and full-scale processes en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Civil Engineering en_US
dc.degree.level Master's en_US
dc.degree.discipline Engineering en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us

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