摘要
以悬浮填料为基体,采用循环浸泡法将铁氧化物负载到填料表面制备出具有催化能力的悬浮填料载体,用于Fenton流化床工艺处理腈纶废水的研究,通过正交实验验证悬浮填料投加率、通气量、H_2O_2浓度和Fe^(2+)投加量对COD降解效率的影响。实验结果表明:悬浮填料负载氧化铁后密度由0.9627g/cm^3略增至1.0216g/cm^3,填料表面铁氧化物覆盖均匀,载体表面负载的氧化物中铁元素含量达到47.17%;正交实验及模拟结果表明各因素影响处理效果的主次顺序为H_2O_2>Fe^(2+)>通气量>填料投加率,以及当实验最佳参数条件为:H2O2浓度为75mmol/L,Fe^(2+)投加量为3.25mmol/L,通气量0.25m^3/h,悬浮填料载体投加率为40%时,COD、BOD_5、NH_3-N、TOC和氰化物的去除率分别为77.8%、44%、76%、70.6%和70%;填料载体循环使用5次后,降解120min,COD去除率从77.8%降到70.4%,性能稳定,可重复利用。
Based on suspended filler as the substrate,iron oxide was loaded onto the surface of the packing material by cyclic immersion method to prepare a catalytic packing material,which was used for the advanced treatment of acrylic fiber wastewater by Fenton fluidized bed process.The effect of addition rate of suspended filler,the amount of ventilation,the concentration of H2O2 and the dosage of Fe2+on the degradation efficiency of COD was studied by orthogonal test.The experimental results showed that the density of suspended filler coated with iron oxide slightly increased from 0.9627g/cm3 to 1.0216g/cm3,and it was evenly for the iron oxide on the surface of filler with 47.17%of iron content.The results of orthogonal test and simulation showed that the factors influenced order processing effect was H2O2>Fe2+>ventilatory capacity>filling rate of catalytic carriers.The optimum parameters conditions were that the concentration of H2O2 was 75mmol/L,Fe2+dosage was 3.25mmol/L,volume 0.25m3/h,suspended carrier dosage rate of 40%,the COD,BOD5,NH3-N,TOC and cyanide were 77.8%,44%,76%,70.6%and 70%,respectively.After 5 cycles of packing carrier recycling with 120min of reaction time,the COD removal efficiencies were reduced from the 77.8%to 70.4%that proved it could be reused with stable performance.
作者
唐佳伟
宁可
雷伟香
张春晖
孟晓飞
TANG Jiawei;NING Ke;LEI Weixiang;ZHANG Chunhui;MENG Xiaofei(School of Chemical&Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Environmental Protection Research Institute of Light Industry,Beijing 100012,China;South China Institute of Environmental Sciences,the Ministry of Environment Protection of PRC,Guangzhou 510000,Guangdong,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第11期4476-4484,共9页
Chemical Industry and Engineering Progress
基金
国家水体污染控制与治理科技重大专项(2017ZX07402001)
关键词
腈纶废水
芬顿
流化床
悬浮填料
acrylic fiber wastewater
Fenton
fluidized bed
suspended filler
