HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (8) Citing Articles via Google Scholar Google Scholar Articles by Dao, T. H. Articles by Daniel, T. C. Search for Related Content PubMed PubMed Citation Articles by Dao, T. H. Articles by Daniel, T. C. Agricola Articles by Dao, T. H. Articles by Daniel, T. C. Related Collections Animal Waste Best Management Practices Nutrient Management Water Pollution Phosphorus

TECHNICAL REPORTS
Waste Management

Particulate and Dissolved Phosphorus Chemical Separation and Phosphorus Release from Treated Dairy Manure

^a Henry A. Wallace Beltsville Agric. Res. Center, Animal Manure and By-Products Lab., Beltsville, MD 20705
^b Crop, Soil, and Environmental Science Dep., 115 Plant Sci., Univ. of Arkansas, Fayetteville, AR 72701

* Corresponding author (thdao{at}anri.barc.usda.gov)

Received for publication November 15, 2001. In confined animal feeding operations, liquid manure systems present special handling and storage challenges because of the large volume of diluted wastes. Water treatment polymers and mineral phosphorus (P) immobilizing chemicals [Al₂(SO₄)₃·18H₂O, FeCl₃·6H₂O, and Class C fly ash] were used to determine particulate and dissolved reactive phosphorus (DRP) reduction mechanisms in high total suspended solid (TSS) dairy manure and the P release from treated manure and amended soils. Co-application exceeded the aggregation level achieved with individual manure amendments and resulted in 80 and 90% reduction in metal salt and polymer rates, respectively. At marginally effective polymer rates between 0.01 and 0.25 g L^-1, maximal aggregation was attained in combination with 1 and 10 g L^-1 of aluminum sulfate (3 and 30 mmol Al³⁺ L^-1) and iron chloride (3.7 and 37 mmol Fe³⁺ L^-1) in 30 g L^-1 (TSS30) and 100 g L^-1 TSS (TSS100) suspensions, respectively. Fly ash induced particulate destabilization at rates 50 g L^-1 and reduced solution-phase DRP at all rates 1 g L^-1 by 52 and 71% in TSS30 and TSS100 suspensions, respectively. Aluminum and Fe salts also lowered DRP at rates 10 g L^-1 and higher concentrations redispersed particulates and increased DRP due to increased suspension acidity and electrical conductivity. The DRP release from treated manure solids and a Typic Paleudult amended with treated manure was reduced, although the amendments increased Mehlich 3–extractable P. Therefore, the synergism of flocculant types allowed input reduction in aggregation aid chemicals, enhancing particulate and dissolved P separation and immobilization in high TSS liquid manure.

Abbreviations: DRP, dissolved reactive phosphorus • PAM, polyacrylamide or polyamine polymers • TSS, total suspended solids • TSS30, total suspended solids in a 30 g L^-1 manure suspension • TSS100, total suspended solids in a 100 g L^-1 manure suspension

This article has been cited by other articles:

				M. Kalbasi and K. G. Karthikeyan Phosphorus Dynamics in Soils Receiving Chemically Treated Dairy Manure J. Environ. Qual., November 1, 2004; 33(6): 2296 - 2305. [Abstract] [Full Text] [PDF]

				T. H. Dao Organic Ligand Effects on Enzymatic Dephosphorylation of myo-Inositol Hexakis Dihydrogenphosphate in Dairy Wastewater J. Environ. Qual., January 1, 2004; 33(1): 349 - 357. [Abstract] [Full Text] [PDF]

				T. H. Dao Polyvalent Cation Effects on myo-Inositol Hexakis Dihydrogenphosphate Enzymatic Dephosphorylation in Dairy Wastewater J. Environ. Qual., March 1, 2003; 32(2): 694 - 701. [Abstract] [Full Text] [PDF]

				T. H. Dao and M. A. Cavigelli Mineralizable Carbon, Nitrogen, and Water-Extractable Phosphorus Release from Stockpiled and Composted Manure and Manure-Amended Soils Agron. J., March 1, 2003; 95(2): 405 - 413. [Abstract] [Full Text] [PDF]