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

作　　者：周开忠 谢爱军 周昌林 ZHOU Kai-zhong;XIE Ai-jun;ZHOU Chang-lin(NJTech Environment Technology Co.,Ltd.,Nanjing 210032,China;Jiazhong Ecological and Environmental Protection(Jiangsu)Co.,Ltd.,Nanjing 210043,China)

机构地区：[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

出　　处：《环境科技》2024年第2期24-29,共6页Environmental Science and Technology

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,H_(2)O_(2)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。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,H_(2)O_(2) 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 H_(2)O_(2) 熄焦废水 

分 类 号：X5[环境科学与工程—环境工程]