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在線閱讀 --自然科學版 2020年6期《響應曲面法優化粉煤灰活性炭H2O2處理焦化廢水》
響應曲面法優化粉煤灰活性炭H2O2處理焦化廢水--[在線閱讀]
陳俊平, 黃征青
湖北工業大學 材料與化學工程學院, 湖北 武漢 430068
起止頁碼: 507--515頁
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.008
摘要
選擇粉煤灰、活性炭、H2O2投加量、初始pH為自變量,以生化處理后焦化廢水COD去除率為響應值,利用Box-Behnken實驗設計與響應曲面法優化了粉煤灰-活性炭H2O2處理焦化廢水的工藝參數,建立了生化處理后焦化廢水COD去除率的二次回歸方程的預測模型,研究了每個自變量及其交互作用對焦化廢水COD去除率的影響.結果表明:粉煤灰、活性炭、H2O2投加量、初始pH與COD去除率存在顯著相關性,優化后的最佳工藝條件:粉煤灰85g/L、活性炭29g/L,H2O2投加量1.9mL/L、初始pH=4.0,COD的去除率為72.54%.經實驗驗證,實際值與模型預測值擬合性良好,偏差僅為1.72%.活性炭經過7次重復吸附-超聲脫附后,還能維持28%以上的脫附率,再生后可重復使用.

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
基金項目: 國家自然科學基金(20776056)

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