Treatment of oily sludge by advanced oxidation process

摘要

For treating oily sludge, wet peroxide oxidation (WPO) and catalytic wet oxidation (CWO) were investigated. The CWO experiment was carried out in a 0.5 L batch reactor using FeCl_3 as catalyst. By using WPO, the effects of reaction parameters such as residence time, temperature, H_2O_2 excess, and initial COD were investigated. The results demonstrated that >80 % chemical oxygen demand (COD) was removed by CWO and >90 % COD was removed by WPO. Significantly, more of COD could be removed from the oily sludge by adding H_2O_2 in small doses. In conclusion, WPO was much more effective in the removal of organic compounds from oily sludge.