It is known that toxic, mutagenic and highly concentrated pollution caused by industrial activities poses a danger to the environment. In this study, the cost analysis of wastewater treatment plants, where wastewater originating from metal, textile and paper industries was carried out. In this context, the investment cost (mixers, pumps and formwork, excavation and the cost of concrete and steel) and operating costs of the plants were examined. Annual energy and chemical consumption costs, personnel and maintenance-repair expenses of the plants were calculated as operating costs. Within the scope of the energy consumption cost, the operating time of the equipment used in the plants and the electricity consumption of them were taken into account. The daily consumption amounts of the chemicals used in the plants (FeCl3, H2SO4, anionic and cationic polyelectrolyte) and the fuel costs of the forklifts assigned for the transportation of the chemicals within the plants were also taken into consideration. It was assumed that two technical staff and 25 auxiliary personnel work for each facility. As a result, the annual operating cost of the metal industry with the lowest electricity consumption, textile with the highest maintenance-repair cost, and the paper industry, which has the highest share in labour and chemical consumption were calculated as 90,600 TL (4.13 TL/m3), 2,276,529 TL (2,84 TL/m3), and 6,147,642 TL respectively. A significant part of this high cost in the paper industry can be met by the recovery of anaerobic gas generated during production.
Anahtar Kelimeler: Energy Consumption, Industrial Activities, Investment Cost, Operating Cost, Treatment Technology