Stabilization of Excess Sludge From Poultry Slaughterhouse Wastewater Treatment Plant by the Fenton Process

For stabilization of excess sludge in activated sludge process, the Fenton process was applied as a safe technique and its effectiveness was experimentally examined. In order to carry out experiments, a batch reactor with the effective volume of ۰.۵ L was used. Effect of hydraulic retention time, pH, H۲O۲, and Fe concentrations on sludge stabilization were investigated. Before and after the process, the content of total solids (TS), volatile solid (VS), chemical oxygen demand (COD), and color were measured. The study showed that, the best efficiency was obtained when iron concentration was ۶۰ mg/L, duration of the process was ۱۵۰ minutes, pH = ۳, and H۲O۲ concentration was ۴۰۰۰ mg/L. The Fenton process can reduce the values of TS, VS, COD, and color to ۵۰%, ۶۱%, ۵۳% and ۶۱%, respectively. By analogy to conventional methods, the Fenton process is an effective method that can be suggested to stabilize excess sludge.