Apparatus and method for aggregating of solid particles and fibers of a liquid material

The present invention relates to a method for aggregating of solid particles and fibers of a liquid material, in which a) is fed the liquid material in a conveying direction, b) where it is meanwhile subjected to an acoustic sound wave, which is> 0 ° propagating at an angle to the conveying direction, so that the solid particles and fibers are moved to a pressure node or at a pressure antinode out by a force of the sound wave, and c) said liquid material is then divided into an aggregate-containing solid particles and fibers first liquid material portion and a second liquid material part. The present invention further relates to the use of acoustophoresis to aggregate of the solid particles and fibers of the liquid material, and a Aggregiervorrichtung to aggregate of the solid particles and fibers of the liquid material, the means for receiving and / or for feeding the liquid material, a causative agent of a generating includes acoustic sound wave, which is provided for urging the liquid material with the sound wave, and a means for separating a first, aggregated solid particles and fibers containing material portion from the liquid material.