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Influence of phenol on ammonia removal in an intermittent aeration bioreactor treating biologically pretreated coal gasification wastewater

查看全文 作　　者：Chunyan [1]Xu;Hongjun [1]Han;Shengyong [1]Jia;Qian [1]Zhao 高影响力作者 机构地区：[1]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology高影响力机构 出　　处：《Journal of Environmental Sciences》索引2016年第28卷第5期,共7页高影响力期刊 基　　金：supported by State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. 2015DX02) 摘　　要：A laboratory-scale intermittent aeration bioreactor was investigated to treat biologically pretreated coal gasification wastewater that was mainly composed of NH_3-N and phenol.The results showed that increasing phenol loading had an adverse effect on NH_3-N removal;the concentration in effluent at phenol loading of 40 mg phenol/(L·day) was 7.3 mg/L, 36.3%of that at 200 mg phenol/(L·day). The enzyme ammonia monooxygenase showed more sensitivity than hydroxylamine oxidoreductase to the inhibitory effect of phenol, with32.2% and 10.5% activity inhibition, respectively at 200 mg phenol/(L·day). Owing to intermittent aeration conditions, nitritation-type nitrification and simultaneous nitrification and denitrification(SND) were observed, giving a maximum SND efficiency of 30.5%.Additionally, ammonia oxidizing bacteria(AOB) and denitrifying bacteria were the main group identified by fluorescent in situ hybridization. However, their relative abundance represented opposite variations as phenol loading increased, ranging from 30.1% to 17.5%and 7.6% to 18.2% for AOB and denitrifying bacteria, respectively. 关 键 词：煤气化废水 生物预处理 生物反应器 间歇曝气 氨氮去除 苯酚 荧光原位杂交技术 反硝化细菌
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