Removal of Phenol by Ozonation in Strongly Alkaline Conditions using a Jet Loop Reactor Operated in Continuous Phase

IF 6.4 4区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Global Challenges Pub Date : 2025-07-02 DOI:10.1002/gch2.202500085

Melahat Semin Barlak, Ibrahim Cengiz, Nejdet Degermenci, Ergun Yildiz

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Abstract

In this study, phenol removal by ozonation under strong alkaline conditions in a continuously operated jet loop reactor (JLR) is investigated. The effects of inlet ozone gas concentration, hydraulic retention time (HRT), and influent phenol concentration on phenol, chemical oxygen demand (COD), and total organic carbon (TOC) removal in the JLR effluent are evaluated. When the inlet ozone gas concentration is 17.5 gO₃ m⁻³, the steady-state phenol, COD, and TOC removal efficiencies are determined as 97.8%, 61.1%, and 32.2%, respectively. When the inlet ozone concentration increases from 17.5 to 56.5 gO₃ m⁻³, phenol is not detected in the JLR effluent. The system operates at different HRTs, and the highest removal efficiency at steady-state is obtained at 8 h HRT. While phenol is completely removed at this HRT, COD and TOC removals are 76.8% and 48.2%, respectively. An increase in phenol concentration in the JLR influent leads to a reduction in the phenol, COD, and TOC removal efficiencies in the steady-state effluent.

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连续相喷射循环反应器在强碱性条件下臭氧氧化去除苯酚的研究

研究了连续运行射流循环反应器（JLR）在强碱性条件下臭氧氧化对苯酚的去除效果。考察了进口臭氧气体浓度、水力停留时间（HRT）和进水苯酚浓度对捷豹路虎出水苯酚、化学需氧量（COD）和总有机碳（TOC）去除率的影响。当进口臭氧气体浓度为17.5 gO3 m−3时，稳态苯酚、COD和TOC去除率分别为97.8%、61.1%和32.2%。当进口臭氧浓度从17.5 gO3 m−3增加到56.5 gO3 m−3时，JLR出水中未检测到苯酚。系统在不同的HRT下运行，在HRT为8 h时获得了最高的稳态去除效率。在此HRT下，苯酚完全去除，COD和TOC去除率分别为76.8%和48.2%。JLR进水中苯酚浓度的增加导致稳态出水中苯酚、COD和TOC去除效率的降低。

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