WASTEWATER TREATMENT FROM THE COMPANY IN KOROŠKA

Podjetje opravlja storitve pranja, likanja in šivanja perila. Pri procesu pranja uporablja pitno vodo, sanitarno vodo in paro. Odpadne vode iz obratov pralnice se stekajo v zbirni jašek. Nato se preko tri-prekatnega usedalnika stekajo v reko. Odpadna voda je onesnažena in je ne smemo izpuščati v reko. Namen diplomskega dela je čiščenje odpadne vode iz podjetja na Koroškem pred izlivom v reko. Ocenili smo kvaliteto odpadne vode iz pralnice pred čiščenjem ter želeli najti ustrezno rešitev za čiščenje odpadne vode, da ustreza zakonsko določenim zahtevam. Prav tako smo opisali delovanje obstoječega mehanskega čiščenja v pralnici ter ugotavljali učinkovitost različnih koagulantov v kombinaciji s flokulantom in/ali aktivnim ogljem vzorcev iz različnih vzorčnih mest v usedalniku. Samo s kombinacijo 60 mg/L Al2(SO4)3 • 18 H2O in 0,25 ml HYDROSAN-a, ko smo določili vrednost ɣ KPK = 115 mg/L O2, smo uspeli znižati KPK pod predpisano mejno vrednost 120 mg/L O2.The company provides services of washing, ironing and sewing facilities. In the washing process using drinking water, hot water and steam. Waste water from washing flows in the collecting shaft and through the three-ventricular settler flows into the river. Waste water is polluted. The aim of the thesis is the treatment of waste water from the company in Koroška before it flows into the river. We have to assess the quality of the waste water before the treatment in laundry and to find an appropriate solution for wastewater treatment that meets the statutory requirements. It was also necessary to describe the operation of the mechanical wastewater treatment and to determine the effectiveness of various coagulants in combination with flocculant and/or activated carbon. Only with the combination of 60 mg/L Al2(SO4)3 • 18 H2O and 0,25 ml HYDROSAN-a we achieved ɣ COD = 115 mg/L O2, which was below the discharge limit 120 mg/L O2