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.
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)
出处
《陕西科技大学学报》
北大核心
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)。
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
tannery chemical
tannic acid
activated sludge treatment system
nitrifying bacteria
metabolic activity
