title: Achievement of high nitrite accumulation via endogenous partial denitrification (EPD).
abstract: This study proposed a novel strategy for achievement of partial denitrification driven by endogenous carbon sources in an anaerobic/anoxic/aerobic activated sludge system. Results showed that in the steady-stage, the nitrate-to-nitrite transformation ratio (NTR) was kept at around 87% without nitrate in the effluent. During the anaerobic period, exogenous carbon sources was completely taken up, accompanied by the consumption of glycogen and production of polyhydroxyalkanoates (PHAs). During the anoxic period, nitrate was reduced to nitrite by using PHAs as carbon sources, followed by the replenishment of glycogen. Thus, the phenotype of denitrifying GAOs was clearly observed and endogenous partial denitrification (EPD) occurred. Furthermore, results showed the nitrate reduction was prior to the nitrite reduction in the presence of nitrate, which led to the high nitrite accumulation.
authors.affiliation: National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Jiantao
authors.initials: J
authors.lastname: Ji
authors.affiliation: National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Yongzhen
authors.initials: Y
authors.lastname: Peng
authors.affiliation: National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.affiliation: National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China. Electronic address: wsy@bjut.edu.cn.
authors.forename: Shuying
authors.initials: S
authors.lastname: Wang
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D058440:Denitrification; D009566:Nitrates / Q000032:analysis / Q000378:metabolism; D009573:Nitrites / Q000032:analysis / Q000378:metabolism; D054813:Polyhydroxyalkanoates / Q000032:analysis / Q000378:metabolism; D012722:Sewage
chemical_list: D009566:Nitrates; D009573:Nitrites; D054813:Polyhydroxyalkanoates; D012722:Sewage
keywords: Anammox; Endogenous partial denitrification; Glycogen; Nitrite accumulation; PHAs