曝气生物滤池处理含氰废水的启动性能及污染物去除特性  

Start-up performance and characteristics of pollutant degradation in biological aerated filter for treating cyanide wastewater

作　　者：郭训文[1] 汪晓军[1] 林旭龙[1] 

机构地区：[1]华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006

出　　处：《化工进展》2013年第1期222-226,共5页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金项目(51078149)

摘　　要：为了探讨曝气生物滤池(BAF)对氰化物的去除能力,采用两级曝气生物滤池对含氰废水进行了启动研究。结果表明,当BAF1和BAF2的HRT分别为7 h和5 h、进水温度为20～25℃、气水比为10∶1、进水COD为400 mg/L左右(葡萄糖配水)时,随着进水CN的增加,两级BAF对CN、COD和TN的去除率逐渐下降。当进水CN从20.22 mg/L增加到65.23 mg/L时,两级BAF对CN、COD和TN的去除率相应从92.1%、90.2%和61.7%降至59.1%、53%和25.4%。当初始CN低于35.34 mg/L时,经过24 h闷曝后,BAF对CN的去除率可达99%以上,出水CN低于0.2 mg/L。初始CN越高,BAF对CN的降解速率越慢,完全降解CN所需的时间越长。To investigate the capacity of cyanide removal by biological aerated filter（BAF）,two-stage BAF was used for treating cyanide wastewater in its start-up test.The results show that the removal rate of CN 、COD and TN in two-stage BAF decreased with the influent CN increasing,under the condition of HRT of 7h in BAF1 and 5 h in BAF2,influent temperature of 20─25 ℃,air-water ratio of 10∶1,influent COD of 400mg/L（containing glucose）.When influent CN increased from 20.22 mg/L up to 65.23 mg/L,the removal rate of CN 、COD and TN were decreased from 92.1%、90.2% and 61.7% down to 59.1%、53% and 25.4%,respectively.BAF can get higher than 99% removal rate of CN by 24 h reaction with initial CN less than 35.34 mg/L.Degradation rate of cyanide in BAF decreased with higher initial cyanide concentration,and more time is needed in BAF to degrade cyanide completely.

关 键 词：电镀废水 氰化物 曝气生物滤池 生物处理 

分 类 号：X703.1[环境科学与工程—环境工程]