内循环式铁碳微电解/H<sub>2</sub>O<sub>2</sub>耦合工艺处理多晶硅有机废水

摘要针对铁碳微电解反应中填料易板结及处理效率低等问题，通过增加内循环装置改进反应器结构，同时将铁碳微电解与H₂O₂进行工艺耦合，用于处理多晶硅有机废水，考察了Fe-C投加量、初始pH值、H₂O₂投加量、反应时间等工艺条件对COD去除率的影响，并通过响应面法优化了工艺条件。结果表明，各工艺条件对多晶硅有机废水COD去除效果的影响大小为：铁碳投加量>反应时间>H₂O₂投加量>初始pH值，其最适宜工艺条件为：铁碳投加量250 g·L^-1，初始pH值2.8，H₂O₂投加量112 mL·L^-1，反应时间83 min，该反应条件下COD的去除率为71.26%。铁碳/H₂O₂降解多晶硅有机废水COD的动力学回归方程为Y=0.5273X-0.6347，降解COD的速率常数为0.527 3 min^-1。

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	赵瑾
	姜天翔
	曹军瑞
	谢宝龙
	马宇辉
	王勋亮

关键词：多晶硅有机废水；铁碳微电解；内循环； H₂O₂；动力学

Abstract： In order to solve the problems such as filler hardening and low efficiency of Fe/C micro-electrolysis, the internal circulation was added to prevent the device from clogging. Coupling technology of Fe/C micro-electrolysis and H₂O₂ was applied to polysilicon organic wastewater, and the effects of technological conditions such as dosing quantity of iron-carbon, initial pH, dosing quantity of H₂O₂, reaction time on removal efficiency of COD were mainly investigated, respectively. Moreover, the reaction conditions have been optimized by response surface method. The results indicate that the influence level of factors on removal treatment efficiency was:Fe/C micro-electrolysis, reaction time, dosing quantity of H₂O₂ and initial pH value. The optimum technological conditions for reaction were:dosing quantity of iron-carbon 250 g·L^-1, initial pH value 2.8, dosing quantity of H₂O₂ 112 mL·L^-1, reaction time 83 min. Under this reaction conditions, the removal rate of COD reached 71.26%. The kinetic regression equation of COD by coupling Fe/C micro-electrolysis and H₂O₂ was Y=0.5273X-0.6347, and the degradation rate constant was 0.527 3 min^-1.

Keywords： polysilicon organic wastewater； iron-carbon micro-electrolysis； inside-circle； H₂O₂； kinetics

Received 2020-11-06;

Fund:天津市“十三五”海洋经济创新发展示范项目（BHSF2017-20）；中央级公益性科研院所基本科研业务费专项资金项目（K-JBYWF-2018-CR01）。

Corresponding Authors: 曹军瑞,E-mail:caojunrui@163.com。 Email: caojunrui@163.com

About author: 赵瑾(1982-),女,工程师,主要研究方向为水净化与再利用。

引用本文:

赵瑾, 姜天翔, 曹军瑞, 谢宝龙, 马宇辉, 王勋亮.内循环式铁碳微电解/H₂O₂耦合工艺处理多晶硅有机废水[J]. 化学工业与工程, 2021,38(2): 88-95

Zhao Jin, Jiang Tianxiang, Cao Junrui, Xie Baolong, Ma Yuhui, Wang Xunliang.Treatment of Polysilicon Organic Wastewater by Inside-circle Coupling Technology of Fe/C Micro-electrolysis and H₂O₂[J]. Chemcial Industry and Engineering, 2021,38(2): 88-95

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