O_(3)/H_(2)O_(2)高级氧化技术抑制溴酸盐生成中试

Pilot Test on Bromate Formation Inhibition by O_(3)/H_(2)O_(2) Advanced Oxidation Technology

采用O_(3)/H_(2)O_(2)—生物活性炭(BAC)组合工艺进行中试,分析该组合工艺控制溴酸盐生成的能力,同时考察组合工艺去除目标污染物硝基苯、UV_(254)、COD_(Mn)的情况。实验结果表明,O_(3)/H_(2)O_(2)—BAC组合工艺控制和去除溴酸盐的效果明显优于常规O_(3)—BAC联用工艺。在相同臭氧投加量条件下,投加少量的H_(2)O_(2)即可明显控制及去除溴酸盐。在去除目标污染物硝基苯方面,与仅投加O_(3)相比,加投H_(2)O_(2)能够明显提高硝基苯去除率,当臭氧投加量为2.0 mg/L、H_(2)O_(2)投加量为0.2 mg/L时,O_(3)/H_(2)O_(2)单元对硝基苯的去除率仍然略高于单独投加2.5 mg/L臭氧的,降低了给水厂的运行成本。

A pilot test of O_(3)/H_(2)O_(2) and biological activated carbon(BAC)combined process was carried out.The ability of the combined process to control bromate generation was analyzed,and target pollutants removal(such as nitrobenzene,UV_(254) and COD_(Mn))by the combined process was investigated.Effect of O_(3)/H_(2)O_(2)-BAC combined process on bromate control and removal was obviously better than that of conventional O_(3)-BAC combined process.Under the same ozone dosage,adding a small amount of H_(2)O_(2) could obviously control and remove bromate.In terms of removing the target pollutant nitrobenzene,adding H_(2)O_(2) could obviously improve the nitrobenzene removal efficiency compared with adding ozone only.When ozone and H_(2)O_(2) dosages were 2.0 mg/L and 0.2 mg/L,the removal efficiency of nitrobenzene in the O_(3)/H_(2)O_(2) unit was still slightly higher than that of adding 2.5 mg/L ozone alone,which reduced the operational cost of the waterworks.