Impact of soluble organic matter and particulate organic matter on anammox system: Performance, microbial community and N_(2)O production  

作　　者：Yingying He HongyuMao Jacek Makinia Jakub Drewnowski Bing Wu Jun Xu Li Xie Xi Lu 

机构地区：[1]Key Laboratory of Yangtze Water Environment,Ministry of Education,Tongji University,Shanghai 200092,China [2]Faculty of Civil and Environmental Engineering,Gdansk University of Technology,Gdansk 80-233,Poland

出　　处：《Journal of Environmental Sciences》2023年第2期146-155,共10页环境科学学报（英文版）

基　　金：supported by the National Science Foundation of China (Nos. 51978487 and 51678424);National Key Research and Development Program of China (No. 2019YFC1906402);the National Science Centre (No. 2017/26/D/ST8/00967)

摘　　要：In this study,the effects of soluble readily biodegradable COD(sCOD)and particulate slowly biodegradable COD(pCOD)on anammox process were investigated.The results of the longterm experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity,to reach as high as 84.9%±2.8%TN removal efficiency.Partial denitrification-anammox(PDN/anammox)and denitrification were proposed as the major pathways for nitrogen removal,accounting for 91.3% and 8.7% of the TN removal,respectively.Anammox bacteria could remain active with high abundance of anammox genes to maintain its dominance.Candidatus Kuenenia and Thauera were the predominant genera in the presence of organic matter.Compared with sCOD,batch experiments showed that the introduction of pCOD had a negative effect on nitrogen removal.The contribution of denitrification to nitrogen removal decreased from approximately 14%to 3% with increasing percentage of pCOD.In addition,the analysis result of the process data using an optimized ASM1 model indicated that high percentage of pCOD resulted in serious N_(2)O emission(the peak value up to 0.25mg N/L),whichwas likely due to limited mass diffusion and insufficient available carbon sources for denitrification.However,a high sCOD/N ratio was beneficial for alleviating N_(2)O accumulation.

关 键 词：ANAMMOX Partial denitrification Microbial community structure Carbon composition Nitrous oxide production 

分 类 号：X703[环境科学与工程—环境工程]