Decoloration of dye wastewater using sludge carbon supported iron catalytic persulfate and ozone oxidation

Industrial enterprises produce a large number of dye wastewater every year.Traditional water treatment method is difficult to achieve the effective treatment of dye wastewater The sewage excess sludge was considered as catalyst raw material in this experiment, it was carbonized and supported iron to catalyze persulfate and ozone. The technology was used to treat the dye wastewater, the influencing factors and mechanism of the reaction were studied, the results showed that when the dosage of the persulfate was 2 g, the mass fraction of iron was 1 %, the dosage of the sludge carbon supported iron was 0.5 g, the dye of orange II removal rate reached 95 % at 4 min. With the increase of the pH of dye wastewater, the removal effect of orange II was getting better. The introduction of ozone further improved the treatment effect, and the removal efficiency reached 97 % at 2 min. The absorbent, the persulfate, ozone react by radical oxidation, and persulfate reacted ozone each other, the dye wastewater decolored by these four ways. The technology not only treated the dye wastewater, but also realized the resource utilization of the excess sludge.