Evaluation industrial and domestic wastewater treatment plant of Diala's state company of electrical industries, Iraq

Abstract

This study is conducted to evaluate the efficiency of plant treatment of the industrial and household wastewater of the Diala state company of Electrical Industries. Sampling was taken monthly for before and after-processing treatment during the period from November, 2014 to March, 2015. Some physicochemical factors were taken, such as temperature, pH, dissolved oxygen, Biological oxygen demand (BOD5), chemical oxygen demand (COD), electrical conductivity, and salinity. In addition, the concentration of five heavy metals lead (Pb), cadmium (Cd), iron (Fe), Copper (Cu) and Zinc (Zn) was determined. Temperature of wastewater in treatment plant showed only a significant difference between temperature before and after treatment in December, 2014. PH was not significant in all study periods before and after the treatment process.Dissolved oxygen concentration was raised after the treatment process during all the study periods, except in February2015. Biochemical oxygen demand (BOD5) and Chemical Oxygen demand (COD) concentrations were decreased after treatment. Electrical conductivity (EC) and salinity (S‰) values were decreased only in December 2104 and February 2015. All heavy metals concentrations were not affected scientifically by the treatment. The results revealed that the treatment plant was not efficient to remove the heavy metals from the industrial and household wastewater of the factory.