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首页> 外文会议>Water Environment Federation annual technical exhibition and conference;WEFTEC 2003 >Refractory COD Removal in the Chemical Industry: Technico-Economic Comparison of Advanced Oxidation Processes
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Refractory COD Removal in the Chemical Industry: Technico-Economic Comparison of Advanced Oxidation Processes

机译：化工中难处理的COD去除：高级氧化工艺的技术经济比较

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Advanced Oxidation Process (AOP) comparison was carried out on an effluent coming fromcosmetic industry. Refractory COD was obtained after a complete biological treatment bymembrane bioreactor (BIOSEP). Six oxidation treatments were compared for CODelimination: Fenton reagent, direct photolysis with a low pressure UV lamp, O_3 at acidic pHand pH 6.25, UV/O_3, UV/H_2O_2, O_3/H_2O_2, O_3/UV/H_2O_2. The results obtained seem to indicatethat removal of COD of this specific solution was mainly due to radical mechanism.However, even if free radical are necessary, the best results are obtained with processesinvolving UV irradiation. Moreover, Fenton reagent offered a maximum COD elimination of80% whatever the peroxide concentration, presenting a fraction that may be more refractorytoward free radical oxidation perhaps due to scavengers competition. Therefore, thecomponents of the treated solution were removable by radical mechanism but a fractionneeded UV photolysis to be completely oxidized. A comparison of the operating cost of theseprocesses shows that for a COD removal of more than 80% the catalytic UV treatment of thislow load industrial wastewater was the most efficient and the most cost effective.
机译：对化妆品行业的废水进行了高级氧化工艺（AOP）比较。膜生物反应器（BIOSEP）经过完全生物处理后，获得了难治的COD。比较了COD消除的六个氧化处理方法：芬顿试剂，低压紫外灯直接光解，酸性pH和pH 6.25的O_3，UV / O_3，UV / H_2O_2，O_3 / H_2O_2，O_3 / UV / H_2O_2。所获得的结果似乎表明该特定溶液的COD去除主要是由于自由基机理所致。但是，即使需要自由基，使用紫外线照射的方法也能获得最佳结果。此外，无论过氧化物浓度如何，Fenton试剂都能最大程度地消除80％的COD，这可能是由于清除剂竞争所致，其对自由基氧化的抵抗力更大。因此，处理过的溶液的成分可以通过自由基机理除去，但是需要少量的紫外线光解才能被完全氧化。这些过程的运行成本比较表明，对于COD去除率超过80％的情况，这种低负荷工业废水的催化UV处理是最有效和最具成本效益的。

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