Recycling rather than disposal: efficient technologies for the treatment of agricultural biomass

Using decanters to produce high-quality fertilizers from fermentation residues

For the efficient processing of fermentation residues, our high-performance GEA decanters reliably separate solid particles, dewater them into a pourable dry consistency, and guarantee a high content of up to 30% dry substance in the solids. Compared with other technologies, there is no risk of blockage with centrifugal technology and the separation of solids is more efficient. Our customers benefit from lower transport and spreading costs, as the high separation efficiency of our decanters ensures a high proportion of organic content in the solids that are spread. Moreover, for lower fresh water consumption, the clear centrate water can be fed back into the fermentation process.

Reducing phosphate and nitrogen content with decanters

GEA decanters are also designed for processing raw slurry and offer users a range of advantages. They can be used to reduce phosphate and nitrogen content efficiently, for example from liquid pig slurry, by separating up to 75% of the phosphate compounds and up to 35% of the nitrogen compounds with the solids. The pourable solids can be composted and used as high-grade fertilizers. The liquid phase is transported to a silo for storage or spread on agricultural land.