Centro Conjunto de Investigación en Química Sustentable, Universidad Autónoma del Estado de México, Toluca, México.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(1):22-30. doi: 10.1080/10934529.2012.629575.
In this research, we studied the treatment of wastewater from the soft drink process using oxidation with ozone. A scheme composed of sequential ozonation-peroxide, ozonation-coagulation and coagulation-ozonation treatments to reduce the organic matter from the soft drink process was also used. The samples were taken from the conventional activated sludge treatment of the soft drink process, and the experiments using chemical oxidation with ozone were performed in a laboratory using a reactor through a porous plate glass diffuser with air as a feedstock for the generation of ozone. Once the sample was ozonated, the treatments were evaluated by considering the contact time, leading to greater efficiency in removing colour, turbidity and chemical oxygen demand (COD). The effect of ozonation and coagulant coupled with treatment efficiency was assessed under optimal conditions, and substantial colour and turbidity removal were found (90.52% and 93.33%, respectively). This was accompanied by a 16.78% reduction in COD (initial COD was 3410 mg/L). The absorbance spectra of the oxidised products were compared using UV-VIS spectroscopy to indicate the level of oxidation of the wastewater. We also determined the kinetics of decolouration and the removal of turbidity with the best treatment. The same treatment was applied to the sample taken from the final effluent of the activated sludge system, and a COD removal efficiency of 100% during the first minute of the reaction with ozone was achieved. As a general conclusion, we believe that the coagulant polyaluminum chloride - ozone (PAC- ozone) treatment of wastewater from the manufacturing of soft drinks is the most efficient for removing turbidity and colour and represents an advantageous option to remove these contaminants because their removal was performed in minutes compared to the duration of traditional physical, chemical and biological processes that require hours or days.
在这项研究中，我们使用臭氧氧化法研究了软饮料生产过程中的废水处理。我们还使用了由顺序臭氧化-过氧化物、臭氧化-混凝和混凝-臭氧化处理组成的方案，以降低软饮料生产过程中的有机物。样品取自软饮料常规活性污泥处理，使用实验室中的反应器通过多孔板玻璃扩散器进行化学氧化臭氧实验，使用空气作为臭氧生成的原料。对样品进行臭氧化处理后，通过考虑接触时间来评估处理效果，从而提高去除颜色、浊度和化学需氧量（COD）的效率。在最佳条件下评估了臭氧化和混凝与处理效率相结合的效果，发现颜色和浊度去除效果显著（分别为 90.52%和 93.33%）。同时，COD 降低了 16.78%（初始 COD 为 3410mg/L）。使用紫外-可见光谱比较氧化产物的吸收光谱，以指示废水的氧化程度。我们还确定了最佳处理条件下的脱色动力学和浊度去除动力学。对取自活性污泥系统最终流出物的样品应用相同的处理方法，在与臭氧反应的第一分钟内实现了 100%的 COD 去除效率。总的来说，我们认为聚合氯化铝-臭氧（PAC-臭氧）处理软饮料生产废水在去除浊度和颜色方面最为有效，是去除这些污染物的有利选择，因为与需要数小时或数天的传统物理、化学和生物过程相比，它们的去除在几分钟内完成。
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