The consortium of Budimex S.A. and Mitsubishi Hitachi Power Systems Europe has modernized the existing flue gas desulphurization and flue gas exhaust system installation at TAURON Wytwarzanie Spółka Akcyjna – Łaziska Power Plant Branch. The task was carried out in the design and build system. The scope of work included m.in. liquidation of the GAVO exchanger for FGD (Flue Gas Desulphurization Installation), construction of an additional “wet” chimney to discharge the flue gas from the absorber, modernization of the absorber consisting in the construction of a sieve shelf to improve the efficiency of desulphurization, connection of flue gas ducts of units 9 and 10 with flue of flue gas ducts of units 11 and 12 together with the installation of tight flaps enabling any configuration of the units’ operation on any FGD.