| Hardcopy Reference: |
HH-10-07-357 |
| Title: |
A concrete slatted floor system for separation of faeces and urine in pig houses |
| Author(s): |
Z. Ye, B. Li, B. Cheng, G. Chen, G. Zhang, Z. Shi, X. Wei, L. Xi |
| Publication Year: |
2007 |
| Reference: |
BIOSYSTEMS ENGINEERING 98 (2007 ) 206 – 214 |
| Country: |
China |
| Summary: |
In the experiments, four concrete slatted floors with one of two slat profiles and one of two gap
widths, and a steel wire slatted floor were studied to estimate their manure separation
performance under practical conditions. It was found that a slope gradient of 201 with a surface coated with fine cement performed best and is recommended for the slope bottom design in the concrete slatted floor system. |
| Abstract: |
A concrete slatted floor system that consists of a narrow-gap slatted floor and beneath it a
slope bottom for separation of faeces and urine in pig houses was investigated. In the
experiments, four concrete slatted floors with one of two slat profiles and one of two gap
widths, and a steel wire slatted floor were studied to estimate their manure separation
performance under practical conditions. To evaluate urine collection efficiency, seven slope
gradients and two surface roughnesses of the slope bottom were investigated under
laboratory conditions.
The lowest percentage of faeces drainage (0.36%) and good urine drainage performance
were obtained by a concrete slatted floor with 5mm-wide gaps and a trapezoidal profile
without sharp edges, indicating that separation of faeces and urine can be achieved on the
surface of this slatted floor. Using the wet surface area of the slope bottom as an indicator
of urine collection efficiency and emission source, a statistical model was developed based
on slope gradient, surface roughness, amount of water and water drop height. It was found
that the wet surface area of the slope bottom decreased as the slope gradient increased, but
increased with increasing surface roughness. The wet surface area was much more
sensitive to the variations of slope gradient at lower compared with higher gradient ranges.
However, contrary sensitivity responses were obtained for surface roughness.
A slope gradient of 201 with a surface coated with fine cement performed best and is
recommended for the slope bottom design in the concrete slatted floor system. |
| Database: |
Welfare |
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