用于模拟废水声波芬顿处理的实验室规模连续反应器的设计、特征描述和性能评估

IF 1.6 4区 工程技术 Q3 Chemical Engineering International Journal of Chemical Reactor Engineering Pub Date : 2024-05-24 DOI:10.1515/ijcre-2023-0238
M. Akram, Abhyuday Mallick, Debasish Sarkar, Sampa Chakrabarti
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引用次数: 0

摘要

本研究开发了一种实验室规模的连续流动搅拌槽反应器(CFSTR),用于超声辅助芬顿降解模拟废水中的罗丹明 B 染料,并对其性能进行了研究。超声反应器由玻璃制成,直径 6 厘米,高 17.5 厘米,配有冷却水套。容积约为 0.4 升,染料溶液的流速为 20 毫升/分钟。超声波由 120 W 探头型超声器提供。通过热电阻研究和 COMSOL Multiphysics 软件中的 CFD 分析研究了流体动力学特性。CFD 分析表明,反应器的行为类似于 CSTR,旁路导致停留时间较短。采用响应面方法确定了该反应器中降解罗丹明 B 溶液的最佳处理条件。建立了一个脱色百分比与初始染料浓度、H2O2 和 Fe2+ 用量(芬顿试剂)相关的模型方程,该方程可以高度准确地预测脱色情况。在最佳条件下,脱色率为 55%,相应的 COD 去除率为 15%。连续式声波芬顿反应器如果规模适当,可用于降解废水中光-芬顿反应无效的深色难降解有机物。
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Design, characterization and performance evaluation of a laboratory-scale continuous reactor for sono-Fenton treatment of simulated wastewater
A laboratory scale continuous flow stirred tank reactor (CFSTR) has been developed for ultrasound-assisted Fenton degradation of Rhodamine B dye in simulated wastewater and its performances have been studied in the present work. The sono-reactor was made of glass, 6 cm in diameter and 17.5 cm in height; fitted with a cooling water jacket. The volume was about 0.4 L and the flow rate of dye solution was 20 mL min−1. Ultrasound was provided with a 120 W probe-type sonicator. The hydrodynamic characteristics were studied by RTD studies and CFD analysis in COMSOL Multiphysics software. The CFD analysis showed the reactor to be behaving like a CSTR with bypassing leading to a short residence time. The optimum treatment conditions in this reactor for degrading Rhodamine B solution were determined using Response Surface Methodology. A model equation correlating the decolorization percentage with the initial dye concentration, H2O2 and Fe2+ dosage (Fenton’s reagent) was developed which can predict the decolorization with a high degree of accuracy. Under optimum conditions, the percent decolorization was 55 and the corresponding COD removal was 15 %. A continuous sono-Fenton reactor, if scaled up properly, can be useful for degradation of dark coloured refractory organics in wastewater where photo-Fenton reaction is ineffective.
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来源期刊
CiteScore
2.80
自引率
12.50%
发文量
107
审稿时长
3 months
期刊介绍: The International Journal of Chemical Reactor Engineering covers the broad fields of theoretical and applied reactor engineering. The IJCRE covers topics drawn from the substantial areas of overlap between catalysis, reaction and reactor engineering. The journal is presently edited by Hugo de Lasa and Charles Xu, counting with an impressive list of Editorial Board leading specialists in chemical reactor engineering. Authors include notable international professors and R&D industry leaders.
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