This paper documents an on-going evaluation of an existing, full-scale solid/liquid separator barn for the potential of improved manure nutrient conservation and management, water recycling, including cost and handling implications. The barn has V-shaped pit floor to drain liquid manure, and automated scrapers to collect solid manure frequently. The finishing barn was built to improve indoor air quality, and improve manure handling and land application of nutrients.
Battery-operated gauges were able to closely monitor the water level, liquid manure flow, and operation of the pump, and the dual-sensor gauge was much easier in data analysis and downloading. The daily liquid manure level fluctuated significantly during the first six months of monitoring, which could be due to differences in animal size and occurrence of barn washing. Solid manure samples collected in the current project had higher moisture contents than the four samples collected in 2014, meaning the solid/liquid separation barn was not as effective in separating solids and liquids as in 2014. But, the settling tests suggest a settling basin could be designed to pre-treat the liquid manure stream before a water extraction process.
A year's worth of data will be collected, and manure nutrient flows of the solid and liquid portions will be quantified. The team will also characterize and compare the barn and management costs (relative to a typical deep-pit barn), practicality, and costs of the use of filtration and reverse osmosis. Will provide pork producers information on potential for the solid/liquid separation barn and filtration process to improve nutrient management, land application, and water conservation.
Teng Lim, Associate Professor, Agricultural Systems Management, University of Missouri
Joshua Brown, Graduate Research Assistant; and Joseph M. Zulovich, Assistant Professor; Agricultural Systems Management, University of Missouri.
Teng Lim, firstname.lastname@example.org
The authors would like to thank the National Pork Board and University of Missouri Extension for financial support, and the farm management team for their help with the project.