单宁酸对活性污泥中功能微生物的影响  

The influence of tannic acid on functional microorganisms in activated sludge

作　　者：裴立影 朱红霞 侯银萍 郝杰 杜琳 郭昌梓 马宏瑞 PEI Li-ying;ZHU Hong-xia;HOU Yin-ping;HAO Jie;DU Lin;GUO Chang-zi;MA Hong-rui(School of Environmental Science and Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;School of Chemical Engineering,Northeast Electric Power University,Jilin 132112,China;Xi'an No.5 Recycled Water Plant,Xi'an 710021,China)

机构地区：[1]陕西科技大学环境科学与工程学院,陕西西安710021 [2]东北电力大学化学工程学院,吉林吉林132112 [3]西安市第五再生水厂,陕西西安710021

出　　处：《陕西科技大学学报》2021年第5期14-19,25,共7页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(22076113);陕西省教育厅专项科研计划项目(20JK0528)。

摘　　要：为探明制革化料对活性污泥处理系统及功能微生物的影响,本研究以活性污泥为研究对象,以单宁酸为模式化料,分析其对活性污泥处理系统的性能和功能微生物-硝化菌代谢活性的影响.结果表明,在单宁酸短期暴露试验中,当单宁酸浓度增加至60 mg/L时,氨氧化菌和亚硝酸盐氧化菌的代谢活性分别从4.42 mg NH_(4)^(+)-N/gVSS h和5.04 mg NO_(2)^(-)-N/gVSSh降低到3.47 mg NH_(4)^(+)-N/gVSS h和4.57 mg NO_(2)^(-)-N/gVSSh.在单宁酸长期暴露试验中,SBR出水中的氨氮,从第7天开始呈现逐渐增加的趋势,至第11天基本稳定在30 mg/L左右,去除率仅为30%,出水磷酸盐浓度基本不变.可见,单宁酸对硝化菌的代谢活性具有明显抑制作用.SEM的结果表明,单宁酸的长期暴露会使得活性污泥的孔隙结构减少,分层结构削弱,菌胶团之间的界限变得模糊.Activated sludge was studied to investigate the influence of tannery chemical of tannic acid on activated sludge treatment system and functional microorganisms of nitrifier.Short-term exposure of tannic acid experimental results showed that as tannic acid increased to 60 mg/L,the metabolic activity of ammonia oxidizing bacteria and nitrite oxidizing bacteria decreased from 4.42 mg NH_(4)^(+)-N/gVSS h and 5.04 mg NO_(2)^(-)-N/gVSS h to 3.47 mg NH_(4)^(+)-N/gVSS h and 4.57 mg NO_(2)^(-)-N/gVSS h,respectively.Long-term exposure of tannic acid results demonstrated that ammonia nitrogen in SBR effluent increased gradugely from day 7 and was almost stable at about 30 mg/L at day 11,indicating that the removal rate was only 30%while the concentration of phosphate in effluent is generally keeps constant.Obviously,the metabolic activity of nitrifying bacteria was inhibited by tannic acid.SEM results show that,long-term exposure of tannic acid will reduce the pore structure of activated sludge,weaken the hierarchical structure,and blur the boundary between the zoogloea.

关 键 词：制革化料 单宁酸 活性污泥处理系统 硝化菌 代谢活性 

分 类 号：X703[环境科学与工程—环境工程]