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Atmospheric NH3 Concentrations and N-Balances for 1.6 million Caged Layer Facility- Manure Belt/Composting vs. Deep Pit
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 014094, 2001 ASAE Annual Meeting. (doi: 10.13031/2013.7462) @2001
Authors: H. M. Keener, D. L. Elwell, D. Grande
Keywords: Ammonia, emissions , manure, nitrogen, odor, poultry
NH3 levels and resulting emissions during the handling of manure within animal-production facilities have significant health, safety, odor-generation and environmental impacts. Aerial concentrations of ammonia were measured in the air leaving and downwind of a 1.6 million caged layer poultry facility using two types of manure management - belt/composting and deep pit. In addition, N-balances were done using a controlled volume approach based on N/ash ratios. Results showed clear advantages of belt/composting over conventional deep pit systems with N retention in compost of 0.560kg/bird/yr versus 0.265kg/bird/yr in deep pit manure. In addition, even with high NH3 concentrations leaving the composting building (90 and 160ppm), atmospheric concentrations were less than 0.25 ppm beyond 50m and total emissions 1/2 of conventional cage layer systems. Data was presented in terms of source concentrations and emission rates. The handling practices associated with the housing systems studied were outlined as background material.(Download PDF) (Export to EndNotes)