Inwatech, as main contractor, completed a 21.800 m3/d capacity petrochemical WwTP for 219.200 PE for BTEX (Benozol, toluol, ethylbenzol and xylol) removal. The multistage technology included flotation, stripping and thermal incineration. Our other tasks included the design works for the renovation, expansion and technological change of the entire existing wastewater treatment plant.