The Effect of Increasing the Organic Carbon Content of Sewage on Nitrogen, Carbon, and Bacteria Removal and Infiltration in Soil Columns
AffiliationU. S. Water Conservation Laboratory, Phoenix, Arizona 85040
Department of Agronomy, Mississippi State University, State College, Mississippi 39762
KeywordsHydrology -- Arizona.
Water resources development -- Arizona.
Hydrology -- Southwestern states.
Water resources development -- Southwestern states.
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Collection InformationThis article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact firstname.lastname@example.org.
PublisherArizona-Nevada Academy of Science
AbstractDenitrification is the only reaction capable of removing the tremendous quantity of nitrogen applied when high-rate land filtration systems are used for renovating sewage water. This study determined that a shortage of organic carbon limits denitrification, and the effects of increased dissolved organic carbon concentrations on soil clogging and movement of fecal coliform bacteria are clearly shown. Finally, the removal of dissolved organic carbon at different carbon concentrations during high rate soil filtration (40-50 cm/day) also limits denitrification.
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UTILIZATION OF TWO SEWAGE SLUDGES ON CROPLAND: YIELD, NITROGEN, AND METAL UPTAKE IN WINTER BARLEY.UNGER, MARVIN.; Hendricks, D. M.; Dutt, G. R.; Feltham, R. D.; Rund, J. V. (The University of Arizona., 1982)Two municipal sludges, one from a highly industrialized city, Chicago, and another from a lesser industrialized, highly agricultural area, Tucson, are compared for barley production on Pima c 1 (Typic torrifluvent). Both sludges were responsible for highly significant additions of Zn, Cu, Ni, Cd and P to the soil each year at the rates of 100mt/ha single and 20mt/ha for 2 years. Nitrogen responses for barley straw and grain were observed from both sludges. Tucson sludge appears to be attractive as a potential fertilizer, not only as an NPK source, but also for its minimal amounts of heavy metals. The Chicago sludge with high levels of heavy metals, particularly Cd, appears unsuited as a fertilizer because of the plant's tendency to take up toxic levels of heavy metals.
Response of Barley and Wheat to Sewage Sludge Loading RatesDay, Arden; Solomon, Mengste; Taylor, Brooks; Pepper, Ian; Minnich, Martha; Ottman, Mike (College of Agriculture, University of Arizona (Tucson, AZ), 1987-09)A greenhouse experiment was conducted to evaluate the responses of barley and wheat to sewage sludge loading rates of 150 to 750 lb /acre plant-available N and to recommended inorganic N (150 lb/ acre). All sewage sludge rates delayed maturity in both barley and wheat. Sludge loading rates up to 450 lb /acre of plant-available N increased vegetative growth and grain yield in both crops. Sludge rates higher than 450 lb/acre of plant-available N resulted in a reduction in the number of plants per pot; however, the stand reduction was greater for wheat than for barley.