The contract included the expansion of the existing plant from the current treated flow rate of 300 m3/h to 600 m3/h. Thus, the doubling of the plant has been realized, which is also equipped with fine screening, 1.5 mm very fine screening, preozonation, ozonation, treatment on CAG, final storage tank, distribution pumping equipment, and sludge thickening system. The dewatering section consisting of polyelectrolyte preparation and dosing system, centrifuges and augers was built. In order to carry out the expansion, it was necessary to divert the ditch that ran through the expropriated area where the filter building arose.