Results of testing landspreading of treated municipal wastewater at St. Petersburg, Florida

Water-Resources Investigations Report 78-110
By: , and 

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Abstract

Chlorinated secondary-treated effluent was used to irrigate a grassed 4-acre site at rates of 2 and 4 inches per week for periods of 11 and 14 weeks, respectively. Part of the site was drained by tile lines 5 feet below land surface. Irrigation of the drained plot resulted in rapid passage of the applied wastewater through the soil and, consequently, poor nitrogen removal. The rapid percolation permitted nitrification but prevented denitrification. Total phosphorus in the shallow ground water at the site increased from a maximum of 1.4 milligrams per liter before irrigation to as much as 5 milligrams per liter in the ground water 5 feet below land surface. Concentrations of nitrogen and phosphorus did not increase in ground water downgradient from the site, although increased chloride concentrations demonstrated downgradient migration of the applied wastewater. Prior to irrigation, total coliform bacteria were not detected in ground water at the site. After irrigation, total and fecal coliforms were detected in the ground water at the site and downgradient. (Woodard-USGS)

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Results of testing landspreading of treated municipal wastewater at St. Petersburg, Florida
Series title Water-Resources Investigations Report
Series number 78-110
DOI 10.3133/wri78110
Edition -
Year Published 1979
Language ENGLISH
Publisher U.S. Geological Survey, Water Resources Division,
Description iv, 47 p. :ill., maps ;28 cm.
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