射流曝气耦合臭氧协同高级氧化工艺处理选矿废水研究

Study on the Treatment of Mineral Processing Wastewater by the Synergistic Advanced Oxidation Process Combining Jet Aeration with Ozone

采用射流曝气耦合臭氧协同高级氧化工艺处理选矿废水,考察了水力停留时间、臭氧投加量、臭氧流量对COD去除效果的影响,并比较了射流曝气与微孔曝气两种曝气方式的效果。结果表明,射流曝气耦合臭氧协同高级氧化工艺处理选矿废水效果良好,在水力停留时间30 min、臭氧流量3 L/min、臭氧投加量240 mg/L的条件下,COD去除量高达355~360 mg/L,去除单位当量COD所需的臭氧量为0.67(mg O_(3)/mg COD)。相比于微孔曝气,射流曝气在相同工况条件下能大幅度提高臭氧传和反应效率,强化COD去除效果,并有效避免曝气设备结垢。

The synergistic advanced oxidation process combining jet aeration with ozone was conducted to treat mineral processing wastewater.The effects of hydraulic retention time, ozone dosage and ozone flow on COD removal efficiency were investigated, and the effects of jet aeration and microporous aeration were compared.The results showed that the performance of the advanced oxidation process coupled jet aeration with ozone in the treatment of mineral processing wastewater is effectively.Under the conditions of hydraulic retention time of 30 min, ozone flow rate of 3 L/min and ozone dosage of 240 mg/L,the COD removal amount could up to 355-360 mg/L,and the amount of ozone required to remove unit equivalent COD was 0.67(mg O_(3)/mg COD).Compared with microporous aeration, jet aeration could greatly improve ozone mass transfer and reaction efficiency, strengthen COD removal efficiency and effectively avoid scaling of aeration equipment under the same conditions.