化学沉淀和Fe/Cu⋅H₂O₂联合工艺快速处理柠檬酸废水

打开文本图片集

中图分类号：X703.1 文献标志码：A

文章编号：2096-2983（2026）01-0064-08

Abstract： A combined treatment process of chemical precipitation and Fe/Cu-H2O2 was studied to address the problems of long treatment cycle， excessve chemical oxygen demand （COD），and high cost of traditional Fe/Cu bimetallic catalysts for citric acid wastewater. By controlling the copper plating conditions， a low copper loading and high activity Fe/Cu bimetallic catalyst was prepared， and the process conditions for treating citric acid wastewater with Fe/Cu⋅H2O2 were optimized using response surface methodology. The results show that after 0.5h of CaO precipitation treatment， the COD mass concentration of the wastewater decreased from 20000mg/L to 383mg/L . Under the conditions of H2O2 addition of 2.1mL/L Fe/Cu addition of 7.4g/L ， initial reaction pH of 2.5，and reaction time of 2.2h ， the response surface methodology predicted a COD removal rate of 95% for the effluent after CaO （204 precipitation， with a deviation of only 1% from the measured value. This combined process reduces the COD mass concentration of the wastewater to 22mg/L within 3.5h ，meeting the Grade A standard of the "Discharge Standard of Polutants for Municipal Wastewater Treatment Plants" GB18918—2002. The research has confirmed that the combined process of chemical precipitation and Fe/Cu-H2O2 is an efficient and low-cost method for treatment of citric acid wastewater.

Keywords： citric acid wastewater; chemical precipitation; Fe/Cu bimetallic catalysts： Fenton-like

柠檬酸清洗液在电站锅炉与发电机定子水冷铜管清洗领域被广泛应用，清洗废水成分中柠檬酸质量分数为 3% 左右，化学需氧量（chemicaloxygendemand，COD）质量浓度高达 20 000mg/L ，给废水处理带来了一定的困难。（剩余8906字）