Comparation of mono layer filter [Sand] dual media filter [anthracite and leca] and performance in removal of organic matter and turbidity

Improvement of water quality standards and inability of mono layer filters in producing such quality caused researchers attended to multi layer filters. Due to specific characteristics of anthracite and leca can improve removal of organic materials and Surface over flow rate. The aim of this research was evaluation performance of dual media filters [anthracite/leca] in removing of organic materials and turbidity from Ahvaz Water treatment plant. In this study two pilots built for investigation of mono layer filter and dual media filter performance. The researcher used sand in structure's media of mono layer filter and composition of anthracite, sand and leca in structure's media of dual media filter, respectively. In this study single and dual layer filter pilot examined in term of organic matter and turbidity removal efficiency. Results indicated that removal of organic matter by single layer filter [sand], dual media filter [anthracite, and sand], dual media filter [leca and sand] was 7%,12%,4/2% respectively. And also Turbidity removal by single layer filter [sand], dual media filter [anthracite and sand], dual media filter [leca and sand] was also 69%, 80%, 74% respectively. Results of this study showed that upgrading of Single layer to dual layer with anthracite and leca media can't show a significant affect in TOC removal

DI-[2-ethylhexyl] phthalate oxidative degradation by fenton process in synthetic and real petrochemical wastewater

Di-[2-Ethylhexyl] phthalate [DEHP] belongs to the class of phthalate esters and is used as an additive in many products including plastics, paints and inks or as a solvent in industrial formulations. The degradation of DEHP in aqueous solution using oxidative Fenton reaction [H[2]O[2]/Fe[2+] was carried out in this study. It was found that H[2]O[2] concentration, Fe[2+] concentration, and pH were the three main factors that could significantly influence the degradation rates of DEHP. The highest degradation percentage [85.6%] of DEHP was observed within 60 min at pH 3 in H[2]O[2]/Fe[2+] system. The results of our study suggested that the concentration with 90 mg/L H[2]O[2] 5 mg/L Fe[2+], and 20 mg/L DEHP in the solution at pH 3 were the optimal conditions. The optimized reaction parameters were preceded for treatment of real wastewater obtained from a petrochemical plant