Page 19 - Poultry Mortality Composting

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Windrow Composting

Windrow composting is a relatively simple and inexpensive way to manage depopulation scenarios. As described previously, the primary stage lasts 4 to 6 weeks before mixing the windrow to begin the secondary stage. Windrows are generally not sheltered from the wind, rain and snow which can affect the process. Because walls and roofs are not required in these designs, it is easier to load, unload and mix the materials. Piles are constructed on all weather surfaces such as low permeable soils or concrete.

The length of the windrow is extended as mortalities occur.

The following points should be taken into consideration for site preparation and operation.

1. A composting pad with a 2% slope should be constructed on 0.5 m (1.6 ft) of clay with permeability less than 5 x 10 -8 m/s (1.6 x 10 -7 ft/s) or an alternative with equivalent protection such as concrete.

2. The site should have a run-on control system to prevent surface water flowing onto the composting area.

3. The site should have a run-off control system to protect surface water from contamination.

4. To mix the material, start at one end of the windrow and move the contents to form a new windrow.

5. If the material is dry, add water while turning.

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