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Investigation on the by-pass line orifice plate assisted hydrodynamic cavitation (B-PLOPA HC) degradation of basic fuchsin (BF) in wastewater
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2022-01-17 , DOI: 10.1016/j.seppur.2022.120501
Jun Qin 1 , Haosheng Sun 1 , Shuang Zhang 1 , Ludong Yi 2 , Yinghao Ruan 1 , Shinuo Wang 1 , Zhaohong Zhang 1 , Jun Wang 1, 3 , Dawei Fang 3, 4
Affiliation  

HC technology has been widely used in the field of wastewater treatment due to its advantages of simple operation, low operating cost and large treatment capacity. However, the conventional HC devices that rely solely on the main line cavitator to treat organic pollutants show unsatisfactory degradation effect. Therefore, it is difficult to enhance the degradation effect of organic pollutants only by optimizing the cavitator geometry and experimental operation parameters. In fact, for traditional HC device the pressure in front of the throttle valve in the by-pass line is same as the inlet pressure of the main line cavitator. In this study, the orifice plate cavitator is firstly used to replace the throttle valve in the by-pass line of the traditional HC device to form a by-pass line orifice plate assisted hydrodynamic cavitation (B-PLOPA HC) device after optimizing the cavitator geometry and experimental operation parameters, realizing the synchronous occurrence of HC effects in the main and by-pass line cavitator and greatly enhancing the degradation effect of organic pollutants. A triphenylmethane dye, basic fuchsin, is used as the simulated pollutant to carry the degradation experiment by using an improved HC device. It was found that, under inlet pressures of 3.0, 4.0 and 5.0 bar within 90 min, the degradation ratios of basic fuchsin were increased from 59.72 %, 73.60 % and 65.23 % by using conventional HC device to 80.93 %, 81.15 % and 81.38 % by using B-PLOPA HC device, respectively. Correspondingly, the wastewater treatment costs were reduced by 41.82 %, 26.16 % and 29.87 %, respectively, compared with those before modification. Obviously, such modification not only enhances the degradation effect of organic pollutants, but also reduces the cost of wastewater treatment. Besides, the active substances generated in B-PLOPA HC system were explored by adding free radical trapping agent. According to the determined results from Liquid Chromatograph Mass Spectrometer (LC-MS) and Total Organic Carbon (TOC), the possible degradation path of basic fuchsin is proposed. In a word, the overall HC effect of system is effectively strengthened through the use of the by-pass line orifice plate. This study provides a solid theoretical basis for large-scale application of HC technology in the field of wastewater treatment.

© 2021 Elsevier Ltd. All rights reserved.



中文翻译:

旁路孔板辅助水力空化(B-PLOPA HC)降解废水中碱性品红(BF)的研究

HC技术以其操作简单、运行成本低、处理量大等优点在废水处理领域得到了广泛的应用。然而,传统的仅依靠主线空化器处理有机污染物的HC装置的降解效果并不理想。因此,仅通过优化空化器几何形状和实验操作参数难以增强有机污染物的降解效果。事实上,对于传统的 HC 装置,旁通管路中节流阀前的压力与主管路空化器的入口压力相同。在这项研究中,孔板空化器首先用于替代传统HC装置旁通管路中的节流阀,在优化空化器几何形状和实验操作后形成旁通管路孔板辅助流体动力空化(B-PLOPA HC)装置参数,实现主、旁路空化器中HC效应的同步发生,大大增强了对有机污染物的降解效果。以碱性品红三苯甲烷染料为模拟污染物,采用改进的HC装置进行降解实验。研究发现,在3.0、4.0和5.0 bar的入口压力下,90 min内碱性品红的降解率从使用传统HC装置的59.72%、73.60%和65.23%提高到80.93%、81.15%和81.38%。通过使用 B-PLOPA HC 设备,分别。相应地,污水处理费用较改造前分别降低了41.82%、26.16%和29.87%。显然,这样的改性不仅增强了有机污染物的降解效果,而且降低了废水处理成本。此外,通过添加自由基捕获剂,探索了B-PLOPA HC体系中产生的活性物质。根据液相色谱质谱仪(LC-MS)和总有机碳(TOC)的测定结果,提出了碱性品红可能的降解路径。总之,通过使用旁通孔板,有效地加强了系统的整体HC效果。该研究为HC技术在废水处理领域的大规模应用提供了坚实的理论基础。相应地,污水处理费用较改造前分别降低了41.82%、26.16%和29.87%。显然,这样的改性不仅增强了有机污染物的降解效果,而且降低了废水处理成本。此外,通过添加自由基捕获剂,探索了B-PLOPA HC体系中产生的活性物质。根据液相色谱质谱仪(LC-MS)和总有机碳(TOC)的测定结果,提出了碱性品红可能的降解路径。总之,通过使用旁通孔板,有效地加强了系统的整体HC效果。该研究为HC技术在废水处理领域的大规模应用提供了坚实的理论基础。相应地,污水处理费用较改造前分别降低了41.82%、26.16%和29.87%。显然,这样的改性不仅增强了有机污染物的降解效果,而且降低了废水处理成本。此外,通过添加自由基捕获剂,探索了B-PLOPA HC体系中产生的活性物质。根据液相色谱质谱仪(LC-MS)和总有机碳(TOC)的测定结果,提出了碱性品红可能的降解路径。总之,通过使用旁通孔板,有效地加强了系统的整体HC效果。该研究为HC技术在废水处理领域的大规模应用提供了坚实的理论基础。污水处理费用较改造前分别降低41.82%、26.16%和29.87%。显然,这样的改性不仅增强了有机污染物的降解效果,而且降低了废水处理成本。此外,通过添加自由基捕获剂,探索了B-PLOPA HC体系中产生的活性物质。根据液相色谱质谱仪(LC-MS)和总有机碳(TOC)的测定结果,提出了碱性品红可能的降解路径。总之,通过使用旁通孔板,有效地加强了系统的整体HC效果。该研究为HC技术在废水处理领域的大规模应用提供了坚实的理论基础。污水处理费用较改造前分别降低41.82%、26.16%和29.87%。显然,这样的改性不仅增强了有机污染物的降解效果,而且降低了废水处理成本。此外,通过添加自由基捕获剂,探索了B-PLOPA HC体系中产生的活性物质。根据液相色谱质谱仪(LC-MS)和总有机碳(TOC)的测定结果,提出了碱性品红可能的降解路径。总之,通过使用旁通孔板,有效地加强了系统的整体HC效果。该研究为HC技术在废水处理领域的大规模应用提供了坚实的理论基础。

© 2021 Elsevier Ltd. 保留所有权利。

更新日期:2022-01-25
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