标题：Effect of PHB and oxygen uptake rate on nitrous oxide emission during simultaneous nitrification denitrification process
作者：Jia, W.;Zhang, J.;Xie, H.;Yan, Y.;Wang, J.;Zhao, Y.;Xu, X.
作者机构：Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineerin
来源：Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies
关键词：N _2O emission;Oxygen uptake rate;PHB;SND
摘要：Simultaneous nitrification denitrification (SND) process was achieved in a SBR system to evaluate the impacts of intracellular carbon source PHB and oxygen uptake rate (OUR) on nitrous oxide (N _2O) emission. Compared with the sequential nitrification and denitrification (SQND) process, SND process significantly improved the nitrogen removal. N _2O emission during SND process was much higher than the SQND process. The amount of N _2O emission was 26.85mg N per cycle in SND process, which was almost four times higher than that in SQND process. About 7.05% of the removed nitrogen during SND process was converted to N _2O-N. N _2O emission had great relations with the OUR and the OUR could reflect the N _2O emission trend more exactly than the DO concentration. At the aerobic stage of SND, the simultaneous denitrification could carried out using PHB as the carbon source and N _2O emission increased because of the slow degradation of PHB.