环境工程学报2017，Vol.11Issue(12)：6259-6265,7.DOI:10.12030/j.cjee.201704024
脉冲曝气活性污泥胞外聚合物的产生特性及其与脱氮效率的关系
Characteristics of extracellular polymeric substances of pulse aerated activated sludge and its relationships with nitrogen removal efficiency
摘要
Abstract
In order to investigate the characteristics of extracellular polymeric substances(EPS) of pulse aerated activated sludge and its relationship with denitrification efficiency.A study between loosely bound EPS (LB-EPS) and tightly bound EPS(TB-EPS) was carried out under the condition of the pulse aeration.Aerobic time was set for 5 min and anoxic time for 10 min.The relationship between EPS and denitrification efficiency was also analyzed.The results showed that the content of LB-EPS was lower than that of TB-EPS and the EPS content kept increasing during the whole pulse aeration acclimation process.Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy showed that the fluorescence intensity of tryptophan in LB-EPS had a red shift and the fluorescence intensity in TB-EPS increases indicating that the content of tryptophan protein had an increasing trend in the EPS of activated sludge with pulse aeration.The removal rate of ammonia nitrogen(NH4+-N) in pulse aeration reactor was about 80％,which was close to that of continuous aeration reactor.However,the removal rate of total nitrogen(TN) was about 50％,nearly 20％ higher than that of continuous aeration reactor.EPS has a detrimental effect on denitrification.There was a negative correlation between the EPS content and the removal rate of NH4+-N and TN under pulse aeration condition.The negative correlation that were significant between LB-EPS and the removal rate of TN.The correlation between TB-EPS and the removal rate of NH+4-N was also negative.关键词
脉冲曝气/活性污泥/胞外聚合物/脱氮效率/三维荧光Key words
pulse aeraton/activated sludge/extracellular polymeric substances/denitrification efficiency/three-dimensional excitation-emission matrix fluorescence spectroscopy分类
资源环境引用本文复制引用
秦丹宁,姜伟立,陈娇,程盼盼,马陈熀,高欢,张勇..脉冲曝气活性污泥胞外聚合物的产生特性及其与脱氮效率的关系[J].环境工程学报,2017,11(12):6259-6265,7.基金项目
江苏省自然科学基金资助项目(BK20171478) （BK20171478）
江苏省环保科研课题(2013014) （2013014）
