MODELING THE EFFECT OF VARIOUS PARAMETERS ON SEWAGE TREATMENT

A study on wastewater treatment in sewage treatment plant in Sirte, Libya was carried out. The sewage chemical analysis for various parameters for raw wastewater and after biological treatment was closely monitored. Regression analysis has shown good correlations between biochemical oxygen demand (BOD) inlet i.e. of incoming raw wastewater and BOD outlet i.e. after biological treatment, suspended solids (SS) outlet and chemical oxygen demand (COD) inlet values with correlation coefficients of 0.81, 0.78 and 0.792 respectively. These correlations could be applied to predict the respective characteristics of the raw wastewater and the treated effluent. All other tested parameters of treated wastewater were in good agreement with expectations based upon the standard and accepted characteristics of sewage for disposal. BOD, COD and SS treatment efficiency had been, on an average of 87, 84 and 89 % respectively.