| CPC B03B 9/06 (2013.01) [B03B 5/34 (2013.01); C12M 23/36 (2013.01); C12M 29/06 (2013.01); C12M 47/12 (2013.01)] | 15 Claims |
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1. A method for hydrodynamically separating heavy materials of a slurry having components of different density using a hydrocyclone, said slurry, after the separation of the heavy components, being supplied to a fermentation reactor for fermentation of fermentable components of said slurry, the slurry being mixed with the material of a controlled return of content from the fermentation reactor to form a substrate supply to the hydrocyclone so as to achieve a reduction in solids content, characterized in that a suspension freed of heavy materials, from the hydrocyclone, is further mixed into the substrate supply for feeding to the hydrocyclone by returning from the hydrocyclone into the mixture of slurry and fermentation reactor content so as to allow a plurality of passes of the slurry through the hydrocyclone before it is supplied to the fermentation reactor in such a way that the supply flow for heavy materials separation is at least two times greater than the mass flow of the mixture of slurry and return from the fermentation reactor and in that throughput through the hydrocyclone is regulated by measuring a pressure in an inlet of the hydrocyclone in such a way that this pressure is kept constant and a delivery rate of a feed pump being controlled via a pressure sensor installed on an inside of a flow profile created by the second bend;
wherein the slurry is diverted from a vertical flow direction into a horizontal flow direction using a first 90° bend and is then diverted horizontally using a second 90° bend prior to the slurry entering the hydrocyclone.
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