Drainage Properties and Ammonia Emissions in Slatted Floor Systems for Animal Buildings |
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| Institution: | 1. Department of Animal Sciences, Colorado State University, College of Agricultural Sciences, Fort Collins 80523;2. Department of Psychology, Colorado State University, College of Natural Sciences, Fort Collins 80521;3. Department of Anatomy and Physiology, Kansas State University, College of Veterinary Medicine, Manhattan 66506;1. Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;2. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, 224000, PR China;2. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing, 100084, PR China;3. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, PR China;1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;2. School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China |
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| Abstract: | Drainage properties of and ammonia emissions from slatted floors and drainage channels were investigated using a laboratory arrangement development for the purpose. The arrangement consists of a steel-framed box with two levels in order to simulate different slatted floor systems. The slatted floor under test is laid on the top level and manure is dropped on to it from various heights. The lower level consists of a drainage channel, the top of which is covered by a lid perforated with holes of different shapes.Drainage experiments on slatted floors for cows with slits from 30 to 45 mm wide showed an average total drainage value for faeces and urine of 72% and an average urine drainage value of 82%. Drainage experiments on slatted floors for pigs showed results varying between 38 and 46% for total drainage depending on different drainage arrangements. The best drainage capacity was obtained when the drainage channel cover had holes giving a large drainage area.The ammonia experiments on slatted floors for cows with 2 and 30 mm spacing showed an accummulated ammonia emission of about 8 and 3 g respectively, during the 20 h testing period. On slatted floors for fattening pigs, the accumulated ammonia emission was calculated to be about 2 g during the 20 h testing period. These ammonia emission results are related to the mass quantities and the nitrogen contents of faeces and urine, which normally are dropped to slatted floor surfaces in animal buildings. |
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