隔膜电解耦合Fe-C异相催化Fenton预处理熄焦废水工艺研究
Research on Pretreatment of Coke Quenching Wastewater by Membrane Electrolysis Coupled With Fe-C Heterogeneous Catalytic Fenton Process
周开忠 1谢爱军 2周昌林2
作者信息
- 1. 南京工大环境科技有限公司, 江苏 南京 210032
- 2. 嘉中生态环保(江苏)有限公司, 江苏 南京 210043
- 折叠
摘要
采用隔膜电解耦合Fe-C异相催化Fenton预处理熄焦废水,隔膜电解酸化效率、碱化效率由高到低顺序分别依次为阴膜阳室>阳膜阳室>石棉隔膜阳室和阳膜阴室>阴膜阴室>石棉隔膜阴室,但离子膜在强氧化环境中寿命短,故采用石棉隔膜,隔膜电解和药剂调节pH值成本分别为 12.33,4.70 元/t,但前者比后者出水TDS浓度降低27.69%.Fe-C异相催化Fenton最优实验条件:pH值为 3,Fe-C投加量为 800 g/L,曝气量为 3 L/min,H2O2 投加量为 6 mL/L,时间为 90 min,干化铁泥产量比传统Fenton低 18.75%～30.75%,节约成本 4.20～7.49 元/t,可有效避免Fenton药剂用量大、铁泥产量大和出水TDS浓度高的问题.
Abstract
Using membrane electrolysis coupled with Fe-C heterogeneous catalytic Fenton for pretreatment of coke quenching wastewater,the order of membrane electrolysis acidification efficiency and alkalization efficiency from high to low is as follows:negative membrane positive chamber>positive membrane positive chamber>asbestos membrane positive chamber and positive membrane negative chamber>negative membrane negative chamber>asbestos membrane negative chamber.However,the lifespan of the ion membrane is short in a strong oxidizing environment,so the cost of using asbestos membrane,membrane electrolysis,and pH adjustment with reagents is 12.33 and 4.70 yuan/t,respectively,But the former reduced the TDS concentration in the effluent by 27.69%.The optimal experimental conditions for Fe-C heterogeneous catalysis of Fenton are pH value = 3,Fe-C dosage of 800 g/L,aeration rate of 3 L/min,H2O2 dosage of 6 mL/L,time of 90 minutes.The dried iron sludge yield is 18.75%～30.75%lower than traditional Fenton,saving costs of 4.20～7.49 yuan/t,which can effectively avoid the shortcomings of large Fenton dosage,high iron sludge yield,and high effluent TDS.
关键词
隔膜电解/Fe-C/Fenton/H2O2/熄焦废水Key words
Membrane electrolysis/Fe-C/Fenton/H2O2/Coke quenching wastewater引用本文复制引用
出版年
2024
NETL
NSTL
万方数据