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RECORD NUMBER: 256 OF 260

OLS Field Name OLS Field Data
Main Title Water quality renovation of animal waste lagoons utilizing aquatic plants /
Author Culley, Jr., Dudley D. ; Gholson, James H. ; Chisholm, Tom S. ; Standifer, Leon C. ; Epps, Ernest A.
CORP Author Louisiana State Univ., Baton Rouge. Agricultural Experiment Station.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher Environmental Protection Agency, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory ; For sale by the National Technical Information Service,
Year Published 1978
Report Number EPA/600/2-78/153; EPA-R-803326
Stock Number PB-286 938
Subjects Animal waste--United States.
Additional Subjects Aquatic plants ; Lagoons(Ponds) ; Agricultural wastes ; Water pollution control ; Aquaculture ; Dairy cattle ; Weed control ; Yield ; Plant growth ; Nutrients ; Concentration(Composition) ; Recovery ; Ammonium compounds ; Proteins ; Nitrogen ; Phosphorus ; Potassium ; Standards ; Spirodela oligoriza ; Spirodela polyrihza ; Lemna gibba
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NTIS  PB-286 938 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation xvii, 149 pages : illustrations ; 28 cm.
Abstract
Duckweeds Spirodela oligorhiza, S. polyrhiza, and Lemna gibba (clone G3) grown on dairy waste lagoons gave an estimated maximum annual yield of 22,023 kg dry wt./ha. S. oligorhiza and L. gibba had higher growth rates in the spring, fall, and winter, with L. gibba growing throughout most of the winter. Nutrient content of the plants increased with increasing nutrients in the lagoons. Mean crude protein of dry duckweeds was 36%, to a maximum of 42%. The duckweeds recovered on a hectare basis the N, P, and K of 15.5, 34, and 8.8 lactating cows respectively. During the winter the rate was 1.27 mg/l/day (duckweed lagoons) and 0.82 mg/l/day for controls. Ammonium reduction was 84% greater in the duckweed lagoons during winter. Phosphorus reduction in duckweed lagoons, though significantly different from controls, was insufficient to meet water quality standards.
Notes
Grant no. R-803326. Issued July 1978. Includes bibliographical references (pages 137-148). Microfiche.