多相光催化氧化处理焦化废水的研究

Coking Wastewater Treated by Heterogeneous Photocatalytic Oxidation

以TiO2为催化剂,H2O2为氧化剂,在紫外光照射下采用多相光催化氧化法对焦化废水进行处理,探讨了影响COD去除率的各种因素,得出了最佳工艺条件。结果表明该法可使焦化厂二沉池废水COD从350.3mg/L降至53.1mg/L,COD去除率可达84.8%。还发现多相光催化氧化工艺并不适合处理高浓度废水,但通过提高H2O2的投加量可扩大多相光催化氧化法处理焦化废水的浓度范围。

Irradiating by ultraviolet light, heterogeneous photocatalytic oxidation method was used to treat coking wastewater with titanium dioxide as catalyst and H2O2 as oxidizing agent to investigate factors that affected COD removal efficiency as well as the optimal operation conditions. Results indicated that COD of wastewater from secondary settling tank in a coking plant can be declined from 350.3mg/L to 53.1mg/L, with removal efficiency up to 84.8%. Heterogeneous photocatalytic oxidation was found not suitable to treat wastewater of high concentration, but the concentration range could be extended by increasing the quantity of H2O2.