Properties of Elazığ Organized Industrial district and animal products organized district wastewaters and treatability studies

In this study, it was aimed to determine the properties of the wastewaters of Elazığ Organized Industrial District (EOID) and Elazığ Animal Products Organized Industrial District (EAPOID) and to investigate their physico-chemical treatability with jar test. For this purpose, samples of wastewater were taken from two different points the common channels of EOID and EAPOID and the physical, chemical and biological properties of wastewater samples were examined in order to determine wastewater characteristics. Temperature, conductivity, dissolved oxygen (DO), pH, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), suspended solids (SS), total nitrogen (TN), total phosphate, heavy metal analyzes such as total chromium (Cr), copper (Cu), lead (Pb), zinc (Zn), cadmium (Cd) and iron (Fe), total coliform and fecal coliform analyzes were carried out. In the physico-chemical treatability studies, FeCl3.6H2O and Al2(SO4)3.18H2O (alum) as coagulant and anionic polyelectrolyte as coagulant aid were used. In the jar test experiments, changes in COD, SS and TN removal efficiencies were investigated in the case of determining of optimum coagulants and the effect of pH on optimum coagulants and when the use of anionic polyelectrolyte with optimum coagulants. The optimum iron (III) chloride dose for EOID wastewater samples was 200 mg/L and the optimum alum dose was 400 mg/L. The optimum removal efficiencies of COD, SS and TN for optimum iron (III) chloride dose were 61.4%, 96.1% and 53.4%, while these values were 76.5%, 96.4% and 63.9% for optimum alum dose, respectively. For EAPOID wastewater samples, optimum iron (III) chloride and optimum alum doses were found to be 400 mg/L and 600 mg/L, respectively. In the optimum iron (III) chloride and alum doses of EAPOID wastewater, the removal efficiencies of COD, SS and TN were 73.4%, 90.5% and 55.7%, for optimum iron (III) while these values were 62.5%, 94.1% and 56.3% for optimum alum dose, respectively. EOID and EAPOID wastewaters were tested with polyelectrolyte together with optimum coagulants and the optimum removal efficiencies was obtained at optimum alum dose. By addition of 400 mg/L alum + 10 mg/L anionic polyelectrolyte in EOID wastewater, the removal efficiencies of COD, SS and TN were determined as 66.2%, 99.1% and 41% respectively. Addition of 600 mg/L alum + 60 mg/L anionic polyelectrolyte in EAPOID wastewater resulted in 76.7%, 96.1% and 45.5% removal efficiencies, respectively. The results of the two organizing industrial wastewater characterization studies and the physico-chemical treatability studies were evaluated according to the Water Pollution Control Regulation. Keywords: Organized Industrial District, Physico-chemical Treatability, Wastewater Characteristics