Intensification of wastewater treatment of the paper and cardboard factory using physical and chemical methods

The results of research on physical and chemical methods for the preliminary treatment wastewater a cardboard paper factory in Khmelnytskyi region are presented. At factory, is treated at sewage plant, which includes sand traps, primary radial sedimentation tanks, aeration tanks with activated sludge regenerators, secondary bioponds. use coagulation chlorination before biological was proposed. Alumofloc 18% used as coagulant, PAA flocculant, sodium hydroxide an alkalizing reagent. study conducted mixture industrial domestic COD BOD5 – 3200 1575 mg/dm3, respectively, 4480 1960 respectively. effects reducing indicators first case after were 30 40%, - 37.82 43.18%, second 28.58 47.25%, It established that significant proportion organic substances according to indicator dissolved state 60-70%. has been proven result chlorination, maximum reduction "pure" achieved, therefore, possibility expediency water settling tank increased doses should be considered technology factory. using oxidation methods, obtained research, will allow reduce concentration BOD ensure increase efficiency treatment.