Pretreatment of composite organic acid cleaning wastewater by iron-carbon micro-electrolysis process

ZHANG Guiquan; WEN Huifeng; JI Guanghui; ZHU Tao; ZHANG Xiangjin; CAO Jieyu; LONG Guojun; YAO Jiantao

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Pretreatment of composite organic acid cleaning wastewater by iron-carbon micro-electrolysis process

更新时间：2025-09-28

- Pretreatment of composite organic acid cleaning wastewater by iron-carbon micro-electrolysis process
- Thermal Power Generation Vol. 46, Issue 3, Pages: 93-97(2017)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 神华河北国华定州发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2017
- 稿件说明：
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ZHANG Guiquan, WEN Huifeng, JI Guanghui, et al. Pretreatment of composite organic acid cleaning wastewater by iron-carbon micro-electrolysis process[J]. Thermal power generation, 2017, 46(3): 93-97.
DOI：

ZHANG Guiquan, WEN Huifeng, JI Guanghui, et al. Pretreatment of composite organic acid cleaning wastewater by iron-carbon micro-electrolysis process[J]. Thermal power generation, 2017, 46(3): 93-97. DOI：

摘要

采用铁碳微电解法对锅炉酸洗产生的有机酸(羟基乙酸+甲酸)清洗废液进行预处理。研究铁碳质量比(m(铸铁屑)∶m(活性炭))、废水初始pH值、填料装填率(填料与废水质量比)、反应温度和停留时间等因素对化学需氧量(COD)降解效果的影响。结果表明:在铁碳比1∶2、废水初始pH=2.85、填料装填率25%、反应温度30℃、停留时间3h的最佳工艺参数下

可获得最高COD降解率33.9%;填料连续反应5次后

仍然具有32.1%的COD降解率;反应过程中

废水pH值的升高可能是抑制有机物继续降解的主要原因。

Abstract

The iron-carbon micro-electrolysis method was applied to pretreat the cleaning wastewater produced during boiler tube acid washing

the organic acid consists formic acid and glycolic acid with high COD.The effects of the ratio of cast-iron scrap to activated carbon

the pH value of the wastewater

the packing loading ratio(namely the ratio of packing quality to wastewater quality)

the reaction temperature and the residence time on the COD removal ratio of wastewater were investigated.The results show that

the highest COD removal rate(33.9%)was obtained under the optimal conditions:the ratio of cast-iron scrap to activated carbon of 1∶2

the initial pH value of the wastewater of 2.85

the packing loading ratio of25%

the reaction temperature of 30 ℃ and the residence time of 3h.After 5times reaction

the COD removal rate was still as high as 32.1%.The increase of the wastewater's pH value may be the major reason for the inhibition of the organics continuous degradation.

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