Proper slurry management is one of the main challenges of the future of the pig farming sector. In view of the growing census and administrative permits that are more and more demanding in environmental terms, slurry limits the options of growth for farms, particularly in areas where pig production is highly concentrated or where there is a scarcity of arable land. Having effective slurry treatment brings economic value and contributes to environmental sustainability.
Slurry is an excellent organic fertiliser that is applied directly to the fields. This management model is highly sustainable, but it does need a few hectares of land that are increasingly difficult to find, especially in areas with high concentrations of livestock, which entails an increase in transport costs.
The ‘on site’ separation of the slurry liquid and solid phase makes it possible to manage the same quantity of slurry with up 75% less soil (if nitrogen is the limiting factor of the application) and up to 95% less soil (if phosphorus is the limiting factor) for the liquid phase, and obtain revenues from the solid phase. On the other hand, problems related to odours, sedimentation and clogging of lagoons are eliminated during periods when the slurry cannot be applied to the fields.