[Effect of Cu on Denitrification Using NO as an Electron Acceptor].

The short-cut biological nitrogen removal process has been widely used in industrial wastewater treatment, and denitrification is a crucial step for removing nitrogen on which the effect of Cu, a common heavy metal ion in wastewater, has not been studied. In this study, sludge with good short-range biological nitrogen removal characteristics in an A/O reactor was selected to investigate the short-term and long-term effects of Cu on denitrification using NO as an electron acceptor. The results showed that Cu had a significant inhibitory effect on denitrification process using NO as an electron acceptor, and the semi-inhibitory concentration EC of sludge activity was 4.