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首页> 外文期刊>Desalination and water treatment >Chemical and biological treatments to clean oily wastewater: optimization of the photocatalytic process using experimental design
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Chemical and biological treatments to clean oily wastewater: optimization of the photocatalytic process using experimental design

机译：化学和生物处理，以清洁含油废水：使用实验设计优化光催化工艺

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The remediation efficiency of oil containing wastewater was evaluated employing an integrated photocatalytic and biological treatment. Both the photocatalytic and biological treatments were carried out in batch reactors using TiO_2 as the photocatalyst. The effects of TiO_2 concentration, pH, and reaction time were optimized by the experimental design, achieving 90.0% of oil removal in 30 min of reaction time at pH = 5.0, with a reaction rate constant of 0.027 min~(-1) (R~2 = 0.71). For biological treatment, we used the bacteria Pseudomonas aeruginosa in biofilms. The biological treatment alone achieved 66.5% of oil removal in just 45 min of treatment, with a reaction rate constant of 0.018 min~(-1) (R~2 = 0.99). To augment the process efficiency, we integrated both the chemical and biological treatments, achieving 99.0% of oil and 78.6% total organic carbon (TOC mg L~(-1)) removal. The concept of experimental design adopted to optimize the photocatalytic process saved time and generated adequate estimates of the experimental variables, which were validated by the reaction kinetics.
机译：采用集成的光催化和生物处理技术评估了含油废水的修复效率。使用TiO_2作为光催化剂，在间歇反应器中进行了光催化和生物处理。通过实验设计优化了TiO_2浓度，pH和反应时间的影响，在pH = 5.0的反应时间30分钟内，除油率为90.0％，反应速率常数为0.027 min〜（-1）（R 〜2 = 0.71）。对于生物处理，我们在生物膜中使用了铜绿假单胞菌细菌。仅在生物处理中，仅在45分钟的处理中就完成了66.5％的除油，反应速率常数为0.018 min〜（-1）（R〜2 = 0.99）。为了提高处理效率，我们将化学和生物处理相结合，去除了99.0％的油和78.6％的总有机碳（TOC mg L〜（-1））。通过采用实验设计的概念来优化光催化过程，从而节省了时间并生成了足够的实验变量估算值，并通过反应动力学进行了验证。

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