在线阅读 --自然科学版 2020年6期《响应曲面法优化粉煤灰活性炭H2O2处理焦化废水》
响应曲面法优化粉煤灰活性炭H2O2处理焦化废水--[在线阅读]
陈俊平, 黄征青
湖北工业大学 材料与化学工程学院, 湖北 武汉 430068
起止页码: 507--515页
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.008
摘要
选择粉煤灰、活性炭、H2O2投加量、初始pH为自变量,以生化处理后焦化废水COD去除率为响应值,利用Box-Behnken实验设计与响应曲面法优化了粉煤灰-活性炭H2O2处理焦化废水的工艺参数,建立了生化处理后焦化废水COD去除率的二次回归方程的预测模型,研究了每个自变量及其交互作用对焦化废水COD去除率的影响.结果表明:粉煤灰、活性炭、H2O2投加量、初始pH与COD去除率存在显著相关性,优化后的最佳工艺条件:粉煤灰85g/L、活性炭29g/L,H2O2投加量1.9mL/L、初始pH=4.0,COD的去除率为72.54%.经实验验证,实际值与模型预测值拟合性良好,偏差仅为1.72%.活性炭经过7次重复吸附-超声脱附后,还能维持28%以上的脱附率,再生后可重复使用.

Optimization on the Treatment of Coking Wastewater by Coal Fly Ash-activated Carbon-H2O2 System Using Response Surface Methodology
CHEN Junping, HUANG Zhengqing
School of Materials and Chemical Engineering, Hubei University of Technology, Hubei Wuhan 430068, China
Abstract:
In this paper,based on that the dosage of coal fly ash,activated carbon,H2O2 and initial pH value were selected as independent variables,and the COD removal rate of the coking wastewater after biochemical treatment was the response value,the Box-Behnken experimental design and response surface method were used to optimize the treatment process parameters of coking wastewater by coal fly ash-activated carbon-H2O2 system.A prediction model for the quadratic regression equation of COD removal rate of coking wastewater after biochemical treatment was established.The effects of each independent variable and their interactions on COD removal rate of coking wastewater were studied.The results showed that there was a significant correlation among the dosage of coal fly ash,activated carbon,H2O2,initial pH and COD removal rate.The optimal process parameters are as follows:coal fly ash dosage 85g/L,activated carbon dosage 29g/L,H2O2 dosage 1.9mL/L,initial pH=4.0,COD removal rate 72.54%.Experiments verified that the actual treatment valuer of coking wastewater fits well with the predicted value of the model,and the deviation is only 1.72%.After 7 times of repeated adsorption-ultrasonic desorption,the activated carbon can still maintain a desorption rate of more than 28%,and can be reused after ultrasonic regeneration.

收稿日期: 2019-11-25
基金项目: 国家自然科学基金(20776056)

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