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首页> 美国卫生研究院文献>Scientific Reports >A Rapid Fenton treatment of bio-treated dyeing and finishing wastewater at second-scale intervals: kinetics by stopped-flow technique and application in a full-scale plant
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A Rapid Fenton treatment of bio-treated dyeing and finishing wastewater at second-scale intervals: kinetics by stopped-flow technique and application in a full-scale plant

机译：Fenton快速处理生物处理后的染整废水的第二级时间间隔：停流技术动力学及其在大规模工厂中的应用

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A rapid Fenton treatment at second-scale intervals was investigated for further removal of organic compounds in the effluent of bio-treated dyeing and finishing wastewater (BDFW). The decolorization kinetics was studied using a stopped-flow spectrophotometer (SFS) at second-scale intervals. A combined first-order model was found to fit well for the decrease of both methylene blue and rhodamine B in SFS as well as SCOD (soluble chemical oxygen demand) and DOC (dissolved organic carbon) in real BDFW in batch test during Fenton oxidation. A full-scale plant with treatment capacity of 400,000 m3·d−1 was designed and has been run continuously based on the results of the stopped-flow study to treat the effluent of BDFW using Fenton oxidation in 16 pipeline reactors, each with a volume of 6.9 m3 and 24 s of reaction time since 2014. The COD, SCOD and DOC decreased from 140, 110 and 35 mg·L−1 to 77, 71 and 26 mg·L−1 respectively, which can meet the latest strict discharge limitations. The natural fluorescent substances detected in the BDFW were completely removed. The main organic pollutants in the BDFW can be significantly reduced using both gas chromatography-mass spectrometry and ultrahigh-performance liquid chromatography-hybrid quadrupole time-of-flight mass spectrometry. The rapid Fenton reaction applied in pipeline reactors at second intervals has several advantages over the conventional Fenton’s process such as much shorter reaction time at second scale intervals, no need to build extra pH adjustment or reaction tanks, simple operation, low capital cost, etc.
机译：为了进一步去除经过生物处理的染整废水（BDFW）的废水中的有机物，研究了第二级间隔的快速Fenton处理。使用停流分光光度计（SFS）以第二刻度间隔研究了脱色动力学。发现在芬顿氧化过程中，批量试验中组合的一阶模型非常适合降低SFS中的亚甲基蓝和若丹明B以及真实BDFW中的SCOD（可溶性化学需氧量）和DOC（溶解的有机碳）。设计了一个处理能力为400,000 m 3 ·d -1 的大型装置，并根据停止流研究的结果连续运行以处理该装置。自2014年以来，采用Fenton氧化的BDFW废水在16个管道反应器中，每个反应器的体积为6.9 m 3 ，反应时间为24s。COD，SCOD和DOC从140、110和35 mg·降低L −1 分别为77、71和26μmg·L -1 ，可以满足最新的严格放电限制。 BDFW中检测到的天然荧光物质已被完全去除。使用气相色谱-质谱和超高效液相色谱-混合四极杆飞行时间质谱都可以显着减少BDFW中的主要有机污染物。与传统的Fenton工艺相比，在第二时间间隔内在管道反应器中进行的快速Fenton反应具有许多优势，例如，在第二规模时间间隔内的反应时间大大缩短，无需建造额外的pH调节器或反应罐，操作简单，投资成本低等。

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