The working of the upflow separator is based on the rate at which different particles settle. The speed is determined by the size, density and shape of the particle. This separation technique is mainly used in the purification of the sand fraction which is released during the processing of polluted soil. This machine is increasingly used as a second step in the removal of the organic fraction from the still somewhat contaminated sand. The separation is done according to the density and the grain size. We have successfuly implemented this technique with different customers, active in the purification of polluted soil and the processing of sand.