Su bazli boya atik suyu aritiminda bir adim ileri gelişmiş deneysel ph kontrol uygulamasi

Abstract

Wastewaters and their ingredients which are formed by industrial activities must be treated before discharge into suitable receivers in order to prevent the pollution of surfacewater, groundwater and soilground. In the present work, water-based paint wastewater treatment is performed using chemical coagulation and flocculation methods. Batch experiments were performed for determination of optimum coagulant and pH conditions using MgCl2, FeCl3 ve Al2(SO4)3 as coagulants at 0.17, 0.34, 0.51, 0.85, 1.19 g/L concentrations and at 7, 8, 9, 10, 11, 12 pH conditions. At 25°C, pH 8 and 0.68 g/L Al2(SO4)3 coagulant concentration conditions absorbance, turbidity and chemical oxygen demand (COD) removal efficiencies are obtained as 93.55%, 79.38% and 22.30% respectively. One step ahead control algorithm is applied to the keep the pH constant at a desired value. It is observed that, control of pH at 8 during process was increased absorbance, turbidity and COD removal efficiencies by 3.36%,14.11%, 54.08% respectively as compared with the uncontrolled case.