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Utilizing Water Treatment Residuals to Reduce Phosphorus Runoff from Biosolids

Journal of Environmental Science and Engineering(A) 2013年第7期2卷 405-417页

作者： Jason Peter de Koff philip alderson moore jr Rodney Dale Williams Randy Young Peter JohnAmadeus Kleinman Department of Agricultural Sciences Tennessee State University Nashville TN 37209 USA Poultry Production and Product Safety Research Unit United States Department of Agriculture~Agricultural Research ServiceFayetteville AR 72701 USA Department of Civil Engineering University of Arkansas Fayetteville AR 72701 USA Arkansas Natural Resource Commission Little Rock AR 72201 USA Pasture Systems and Watershed Management Research Unit United States Department of Agriculture~ Agricultural ResearchService University Park PA 16802 USA

Approximately 40% of biosolids （sewage sludge） produced in the U.S. are incinerated or landfilled rather than land applied due to concern over non-point source P （phosphorus） runoff. The objective of this study was to determine the impact of chemical amendments on WEP （water-extractable phosphorus） in applied treatments and DRP （dissolved reactive phosphorus） in runoff from biosolids-amended soils. Rainfall simulations were conducted in 2006 on field plots fertilized with biosolids that had been treated with alum [（A12804）3＂ 14H20], ferric chloride （FeC13） or an alum-based WTR （water treatment residual） at a rate of 20% （wt/wt） to reduce DRP in runoff. In 2007, rainfall simulations were conducted using WTR/biosolid blends of 15% and 30% （wt/wt） that were allowed to incubate for three weeks prior to application. Cumulative DRP runoff load observed for the 20% WTR treatment was not significantly different from other chemical treatments and resulted in a 45% reduction in DRP runoff as compared to the untreated biosolids application. Cumulative DRP runoff load in 2007 for the 15% and 30% WTR treatments resulted in significantly lower DRP loads compared to untreated biosolids and led to DRP runoff load reductions of 78% and 85% （compared to the untreated biosolids application）, respectively.

关键词： Biosolids sewage sludge phosphorus runoff water treatment residuals land application rainfall simulation,amendment.

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