After many years of worldwide research illustrating the many benefits of Slurry separation, the norm. in the UK is less than 50% (much less possibly) of farmers doing it. It is believed that the perception is: it’s unnecessary and expensive to buy the equipment and run it.
Separation removes most of the solid particles from the slurry producing two products: a liquid and semi-dry. The amount of semi-dry removed and its dry-matter (DM) is determined by the separation method and its screen size.
Liquid: This fraction is stored in tanks/lagoons. Containing very little DM it does not require agitation (no sediment) and does not form a surface crust. The removal of the DM lessens its volume by anything up to 30% requiring smaller storage and the weed seed population is drastically reduced.
Compared to raw slurry, it can be pumped far greater distances, and as the nutrient content is less, it can be applied in greater concentration.
This liquid can recycled for yard, aisle and slurry channel flushing before being applied to the land. Go to our flushing section on this site for full details.
Land application can be applied much the same as raw slurry but lends itself far more to irrigation/umbilical systems due to its more pumpable nature.
Dry: Storage of this dry fraction depends on the extent of its dewatered state (up to 36% DM) but is generally pilled on yard or bunker/weeping-wall type areas or dropped straight into transport or spreading trailers.
The storage requirement is much smaller compared to the liquid part, and being a more concentrated product, transport distances are dramatically increased.
Screw Press separation offers this product as an alternative bedding material (green bedding) to sand or sawdust for dairy cows cubicles. Go to our green bedding section on this site for full details.
Land application by muck spreaders trailer.
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