Method for treating furfural wastewater by ozone-Fenton coupling

The invention relates to a method for treating furfural wastewater by ozone and Fenton coupling. The method comprises the following steps: (1) adding sulfuric acid or sodium hydroxide into the furfural wastewater to adjust the pH value of the furfural wastewater to 3; (2) adding a Fenton catalyst ferrous salt solid and an oxidizing agent hydrogen peroxide into the solution obtained in the step (1), and introducing ozone for reaction; and (3) adding a sodium hydroxide solution into the solution obtained in the step (2) to adjust the pH value to 10, and discharging after flocculent precipitate is formed. The capability of degrading organic matters is obviously improved, the process can be completed only by a single reaction device, the process is simple and economical, and the operation is reliable. 本发明为一种采用臭氧芬顿耦合处理糠醛废水的方法。该方法包括如下步骤：(1)向糠醛废水添加硫酸或氢氧化钠调节其pH为3；(2)向步骤(1)所得溶液中添加芬顿催化剂亚铁盐固体和氧化剂双氧水并通入臭氧反应；(3)向步骤(2)所得溶液中添加氢氧化钠溶液调节pH为10，形成絮凝沉淀后排放。本发明降解有机物能力有显著提升，仅需单个反应装置即可完成，工艺简单经济，运行可靠。