臭氧氧化法对颜料废水中苯胺的深度降解研究

Further Treatment of Aniline in Pigment Wastewater via Ozone Oxidation

酸性颜料废水采用"物理、微电解及生物"组合工艺处理后,出水水质中苯胺和色度仍无法满足CJ 343—2010《污水排入城镇下水道水质标准》的要求,故采用臭氧氧化法对其进行深度处理.实验研究了废水pH、臭氧投加速率、反应温度以及苯胺质量浓度对臭氧氧化该废水的影响.结果表明:臭氧氧化的最佳工艺条件为pH=5、反应温度298.15K、臭氧投加速率0.92mg/(L·min),反应13min后色度由100降至40,苯胺由25mg/L左右能稳定降到2mg/L以下,出水水质满足排放标准.同时,对臭氧降解苯胺进行动力学拟合,其结果符合一级动力学方程.

The “physical/micro-electrolysis/biological” process was used to treat acid high color pigment wastewa-ter. However, the concentration of aniline and chroma do not meet the “wastewater quality standards for discharge to mu-nicipal sewers”（CJ 343-2010）, so the bio-treated pigment wastewater was further treated via ozone oxidation. In this re-search, the influence of pH, ozone release rate, reaction temperature and initial concentration was investigated. The results showed that the optimum process conditions were pH=5, reaction temperature T=298.15,K, and the ozone release rate 0.92,mg/（L·min）to wastewater. After 13,minutes’treatment,the color was reduced to 40 from 100, the aniline can be degraded stably from 25,mg/L down to 2,mg/L below, and the effluent quality was up to the standarded. The degradation of aniline by ozone exhibited pseudo first-order kinetics.