Date of Graduation

1997

Document Type

Dissertation

Degree Type

PhD

College

Davis College of Agriculture, Natural Resources and Design

Department

Microbiology, Immunology, and Cell Biology

Committee Chair

Alan J. Sexstone

Committee Co-Chair

Gary K. Bissonnette

Committee Member

David B. Yelton

Committee Member

Jeffery G. Skousen

Committee Member

Daniel G. Panaccione

Committee Member

Keith Garbutt

Abstract

Many small communities located in rural areas of the United States lack adequate domestic wastewater treatment plants. Constructed wetlands are being promoted as low-cost, low-maintenance systems for treatment of domestic wastewater in areas where standard septic tanks fail. In order to evaluate the efficacy of small constructed wetlands, 20 small-scale wetlands mesocosms (100 gal each) containing five plant treatments (no plants/control, Typha, Scirpus, and Juncus monocultures, and all three species combined) were planted into pea gravel at either 18 or 24 inches in depth. Each mesocosm received 5 gal/day of primary-treated domestic sewage. Mesocosms were monitored on a monthly basis over a two year period for TSS, BOD{dollar}\\sb5,{dollar} TKN, TP, and metals. Fecal coliforms, enterococci, Salmonella, Shigella, Yersinia and coliphage were also enumerated. Significant differences between influent and effluent water quality (p {dollar}

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