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Two parallel CANON Sequencing Bach reactors were started, and 67ppm NO 2  was added into Sequencing Bach Reactor 2 while nothing was added to Sequencing Bach Reactor 1. The total nitrogen removal efficiency of SBR1 was 65.5±5.0% at a removal rate of 0.198±0.023 kgN/m 3 /d. Meanwhile, the SBR2 with NO 2  addition showed a removal efficiency of 67.5±6.2%, with a removal rate of 0.277±0.017 kgN/m 3 /d. The SBR2 had a higher removal efficiency and rate than the SBR1. The continuous addition of trace NO 2  into the CANON Sequencing Bach Reactor allows conventional aerobic ammonia oxidation with O 2  as the electron acceptor and ammonia oxidation of with NO 2  as the electron acceptor to take place simultaneously, thus improving the ammonia oxidation rate and autotrophic nitrogen removal performance.  China Library Classification No.: X703.1 Literature Label: A Article No.:

Long-Term Effects of Trace NO2 Addition on the Performance of CANON SBR