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Mechanical Solid-Liquid Manure Separation: Performance Evaluation on Four New York State Dairy Farms – A Preliminary Report

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  054104,  2005 ASAE Annual Meeting . (doi: 10.13031/2013.19506) @2005
Authors:   Curt A. Gooch, Scott F. Inglis, Karl J. Czymmek
Keywords:   Solid-manure separation, manure treatment, nutrient separation, separator mass flow

Five mechanical solid-liquid manure separators manufactured by three different companies and located on four production dairy farms in New York State were sampled monthly from May 2001 to December 2004 (not every separator was sampled continuously throughout this period). Samples were analyzed in an EPA approved commercial laboratory for total solids, total volatile solids, total phosphorus, ortho phosphorus, total Kjeldahl nitrogen, ammonia nitrogen, and potassium. Organic nitrogen was determined by subtraction. The efficiency of capture of each effluent stream was calculated for each constituent analyzed. All separators, regardless of farm specific affects on separation performance, captured no more than 25 percent of the nitrogen and phosphorus in the solid effluent stream. Implications on each farms CAFO plan were analyzed and the results are presented.

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