The roles of typical emerging pollutants on N2O emissions during biological nitrogen removal from wastewater
Ying Yang, Guifeng Li, Zhida Li, Lu Lü
Abstract
N 2 O as a potent greenhouse gas often generates in the biological nitrogen removal (BNR) processes during wastewater treatment , which makes BNR become an important greenhouse gas emission source. The emerging pollutants (EPs) are ubiquitous in wastewater and they have shown to influence the BNR processes. However, the deep discussion on potential impacts of EPs on N 2 O emissions during BNR is rare. Moreover, the experimental parameters for EPs investigation in most of literatures are generally not in line with real-world BNR processes, which calls for deep elucidating the roles of EPs on N 2 O production and emission. In this work, a critical review summarizes the existing literature about influences of typical EPs on N 2 O emissions and associated mechanisms during BNR, and it discusses the impacts of some easily overlooked factors, such as real EPs environmental concentrations, EPs bioaccumulation, and multiple EPs coexistence on N 2 O emissions. This review will provide an insight into exploring and mitigating threats posed by typical EPs on N 2 O emissions.