响应面法优化超临界水氧化处理农药废水
Treatment of pesticide wastewater by supercritical water oxidation optimized using response surface methodology
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摘要: 在间歇式超临界水氧化系统中对草甘膦农药废水进行降解实验。选取温度、反应时间、过氧量3个量为因素量，总有机碳(TOC)去除率为响应量进行中心组合设计（CCD）。在实验的基础上，利用响应面分析法（RSM）对实验结果进行分析及参数优化：建立了TOC去除率与各个因素关系的二次多项式数学模型；分析了各个因素单独的及相互作用对TOC去除率的影响；优化结果表明，在温度483℃、反应时间29.2 min、过氧量148.4%的条件下，达到了最佳效果，此时TOC的去除率为100%。Abstract: In this study， glyphosate pesticide wastewater was degraded by supercritical water oxidation (SCWO) in a batch reactor. Temperature， reaction time and excess oxygen were selected as factors while the total organic carbon(TOC) as the response. The SCWO experimental results were analyzed and optimized using response surface methodology(RSM). A quadratic polynomial which expressed the relationship between response TOC removal and the three factors was established. And then individual and interactive effects of three factors on TOC removal were investigated. Finally optimized reaction conditions for SCWO process were found out as a temperature of 483℃， a reaction time of 29.2 min and an oxidation coefficient of 148.4%. Under these conditions， 100% of TOC removal could be obtained.
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