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首页> 外文期刊>Journal of the Taiwan Institute of Chemical Engineers >Treatment of of multicomponent aqueous solution of purified terephthalic acid wastewater by electrocoagulation process: Optimization of process and analysis of sludge
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Treatment of of multicomponent aqueous solution of purified terephthalic acid wastewater by electrocoagulation process: Optimization of process and analysis of sludge

机译：电凝法处理精对苯二甲酸废水多组分水溶液的工艺优化及污泥分析

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摘要

The present research work is based on degradation of major pollutants of purified terephthalic acid (PTA) wastewater by electrocoagulation (EC) process. Terephthalic acid (TPA), benzoic acid (BA) and para-toluic acid (p-TA) are the major pollutants of PTA wastewater. A central composite design (CCD) has been developed for maximum removal of TPA, BA, p-TA, COD and minimum consumption of energy. Effects of various process parameters viz. pH: (5-13), current density: (49.5-255.5 A/m(2)), supporting electrolyte concentration, NaCl: (0.25-2.25 g/L) and electrolysis time: (15-95 min) are studied on removal efficiencies of responses. Aluminium (Al) and iron (Fe) were selected as electrode materials. Maximum percentage removal of TPA: 56.21, 54.10; BA: 59.52, 53.84; p-TA: 45.71, 39.91, and COD: 49.91, 42.95 are achieved at optimum operating conditions by Al and Fe electrodes respectively. Operating cost of the process was calculated based on energy consumption, electrode consumption, sludge disposable, and transportation costs and found $13.64 and $14.46 per kg of COD removed by Al and Fe electrodes respectively. Sludge residues obtained after EC treatment at optimum operating conditions are analyzed by settling, sludge volume index (SVI), XRD, SEM/EDX, point of zero charge (PZC), FTIR and DGA/TGA. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：本研究工作基于通过电凝（EC）工艺降解纯对苯二甲酸（PTA）废水的主要污染物。对苯二甲酸（TPA），苯甲酸（BA）和对甲苯甲酸（p-TA）是PTA废水的主要污染物。已开发出一种中央复合设计（CCD），以最大程度地去除TPA，BA，p-TA，COD和最低能耗。各种工艺参数的影响。研究了pH：（5-13），电流密度：（49.5-255.5 A / m（2）），支持电解质浓度，NaCl：（0.25-2.25 g / L）和电解时间：（15-95分钟）去除反应的效率。选择铝（Al）和铁（Fe）作为电极材料。 TPA的最大去除百分比：56.21，54.10; BA：59.52、53.84;在最佳操作条件下，分别通过Al和Fe电极获得p-TA：45.71、39.91和COD：49.91、42.95。该过程的运营成本是根据能耗，电极消耗，一次性污泥和运输成本计算得出的，发现铝和铁电极分别去除的每千克COD分别为13.64美元和14.46美元。通过沉淀，污泥体积指数（SVI），XRD，SEM / EDX，零电荷点（PZC），FTIR和DGA / TGA对在最佳运行条件下经EC处理后获得的污泥残余物进行分析。 （C）2015台湾化学工程师学会。由Elsevier B.V.发布。保留所有权利。

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