Stenco designed, built and carried out the start-up of the Industrial Wastewater Treatment Plant of 150m3 / day of a multinational company in the food sector in Poland, after having also carried out the treatment plants for this multinational group in Spain and Ireland. The treatment plant consists of pumping station, pre-treatment, flow regulation, biological reactor (with anaerobic, anoxic and aerated stage) and sludge line treatment. Reductions of over 90% in organic loading rate (COD) and nitrogen (N) were achieved.