活性炭吸附耦合光催化氧化技术资源化处理染料废水

Resource treatment of dye wastewater by activated carbon adsorption coupled with photocatalytic oxidation technology

采用“活性炭吸附-HMPO光催化氧化”组合工艺对高盐染料废水进行处理,考察了活性炭吸附体积、吸附pH、H_(2)O_(2)质量分数、氧化反应pH及紫外灯功率变化对高盐水中TOC去除率的影响。结果表明,活性炭吸附适宜pH=6,吸附体积为45倍,紫外灯功率为10 W,波长254 nm,氧化剂质量分数2%时,组合工艺处理后TOC、TN去除率分别达到98.7%、89.7%,氧化出水进蒸发单元蒸盐,合格成品盐达到厂商回用要求,冷凝水可以套用,实现了染料废水的资源化利用。

The combined process of"activated carbon adsorption-HMPO photocatalytic oxidation"is used to treat the high-salt dye wastewater,and the effects of activated carbon adsorption volume,pH of adsorption,H_(2)O_(2)concentrations,pH of oxidation reaction and UV lamp power on the TOC removal rate in high salt wastewater are investigated.The results show that when the proper p H for activated carbon adsorption is 6,the adsorption volume is 45 times,the UV lamp power is 10 W,the wavelength is 254 nm,and the mass fraction of oxidant is 2%,the removal rates of TOC and TN after combined process treatment are 98.7%and 89.7%respectively.The oxidized water enters the evaporation unit for salt evaporation.The qualified salt products meet the manufacturer’s recycling requirements,and the condensed water can be reused,therefore,the resource utilization of dye wastewater can be realized.