Dye wastewater treatment using fenton process with Fe(II) electrolytically regenerated from iron-containing sludge

• Main Authors: Yi-Cheng Chiu, 邱亦政
• Other Authors: 李奇旺
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/78867169710297738642

碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 93 === Fenton process producing hydroxyl radical removes contaminants efficiently and rapidly. However, huge quantity of iron sludges produced by the process hinders application of this process in full scale treatment system. In this study, Fe (II) regenerated from iron sludge by electrolytic method was employed to reduce the sludge problem. At pH of 1.0, Fe (II) can be regenerated efficiently from iron sludge. The electrolytic current efficiency of Fe(II) regeneration was about 20~30%, depending on current density. Synthetic dye wastewater was prepared and treated with Fenton process using regenerated Fe (II). More than 99% of COD removal can be achieved by the process. Effluent conductivities increased with increasing the dosage of regenerated Fe (II), ranging from 0.87 to 67.8. VSS/TSS ratio of sludges increases and dewaterability of iron sludge worsen gradually with the number of the sludge been used. In this study, we found the sludge could be reuse and reduce to Fe(II) which was used as the iron source for the subsequent Fenton process. Synthetic dye wastewater was treated with Fenton process using recycled iron, and the amount of sludge generated was reduced substantially.