引用本文:郭莹,陈鸿汉,张焕祯,王宁,常思淼,方有存,王晖,等.基于Box-Behnken响应曲面法优化Fenton预处理高浓度染料中间体生产废水[J].环境科学研究,2017,30(5):775-783.
GUO Ying,CHEN Honghan,ZHANG Huanzhen,WANG Ning,CHANG Simiao,FANG Youcun,WANG Hui,et al.Optimization of Fenton Pre-Treatment of High Concentration Dye Intermediate Wastewater Based on Box-Behnken Response Surface Methodology[J].Reserrch of Environmental Science,2017,30(5):775-783.]
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基于Box-Behnken响应曲面法优化Fenton预处理高浓度染料中间体生产废水
郭 莹, 陈鸿汉, 张焕祯, 王 宁, 常思淼, 方有存, 王 晖
中国地质大学(北京)水资源与环境工程北京市重点实验室, 北京 100083
摘要:
为高效处理染料中间体生产废水、优化工艺参数,针对染料中间体生产废水有机负荷高、生物抑制性强等特点,选用Fenton氧化处理过程,以实际生产废水为研究对象,基于Box-Behnken响应曲面法分别考察了反应时间、初始pH、n(H2O2)/n(Fe2+)、Fenton试剂投加频率等因素对Fenton法处理废水过程的单独影响及各因素间的交互作用,并建立以CODCr去除率为评价指标的数学模型进行全面分析. 结果表明:各影响因子显著性顺序为初始pH>n(H2O2)/n(Fe2+)>Fenton反应时间>投加频率,其中n(H2O2)/n(Fe2+)与投加频率的交互作用最为显著(F=3.43);模型决定系数R2=0.917 9,说明模型可信度和精密度高;最佳反应条件组合为反应时间30 min、初始pH为3.46、n(H2O2)/n(Fe2+)为6.12、投加频率为2次. 预测最大CODCr去除率为56.53%,验证试验实测平均结果为55.17%,与预测值相比偏差为1.36%. 经最优条件处理后废水的ρ(CODCr)由9 600 mg/L降至4 000 mg/L左右,ρ(BOD5)/ρ(CODCr)由0.07增至0.37,可生化性提高. 研究显示,采用Fenton法预处理高浓度染料中间体废水可有效提高CODCr去除率及其可生化性.
关键词:  Box-Behnken响应曲面法  染料中间体  生产废水  Fenton  预处理
DOI:
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基金项目:国家自然科学基金项目(51238001)
Optimization of Fenton Pre-Treatment of High Concentration Dye Intermediate Wastewater Based on Box-Behnken Response Surface Methodology
GUO Ying, CHEN Honghan, ZHANG Huanzhen, WANG Ning, CHANG Simiao, FANG Youcun, WANG Hui
Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
Abstract:
Abstract: In order to treat dye intermediate wastewater efficiently and optimize the process parameters, this study investigated actual production wastewater and characterized it by high organic loading and biological inhibition. Based on the Box-Behnken response surface method, the separate action and interaction effects of reaction time, initial pH, n(H2O2)/n(Fe2+) and dosing frequency were evaluated, and an empirical mathematical model between CODCr removal rate and influencing factors was established by Fenton process. The significance of influencing factors followed the order:initial pH> n(H2O2)/n(Fe2+) >reaction time>dosing frequency, and the most significant interaction occurred between n(H2O2)/n(Fe2+)and dosing frequency (F=3.43). Furthermore, the decision coefficient R2=0.9179 showed that the model had high reliability and high precision. The optimal reaction conditions were determined to be reaction time 30 min, pH 3.46, n(H2O2)/n(Fe2+) 6.12, and dosing frequency twice. The predicted maximum CODCr removal was 56.53%, while the average result of verification test was 55.17%, with a deviation of 1.36%. Under optimal conditions, the ρ(CODCr) of the treated wastewater decreased from 9600 mg/L to about 4000 mg/L, ρ(BOD5)/ρ(CODCr) increased from 0.07 to 0.37, indicating that the biochemical properties were improved. Therefore, the Fenton process was successfully applied for the pretreatment of the high concentration dye intermediate wastewater with a favorable CODCr removal efficiency and could improve the biodegradability.
Key words:  Box-Behnken response surface methodology  dye intermediate  production wastewater  Fenton process  pretreatment