Enhancing autotrophic nitrogen removal with a novel dissolved oxygen-differentiated airlift internal circulation reactor: Long-term operational performance and microbial characteristics

2021 ◽  
Vol 296 ◽  
pp. 113271
Author(s):  
Hong Wang ◽  
Guanlong Yu ◽  
Weining He ◽  
Chunyan Du ◽  
Zhengyu Deng ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Nitrogen Removal ◽  
Operational Performance ◽  
Internal Circulation ◽  
Microbial Characteristics ◽  
Autotrophic Nitrogen Removal

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

2021 ◽  
Vol 261 ◽  
pp. 02011
Author(s):  
Cai Qing ◽  
Ding Jiajia
Keyword(s):  
Removal Efficiency ◽  
Electron Acceptor ◽  
Nitrogen Removal ◽  
Ammonia Oxidation ◽  
Removal Rate ◽  
Long Term Effects ◽  
Total Nitrogen Removal ◽  
Ammonia Oxidation Rate ◽  
Autotrophic Nitrogen Removal

Two parallel CANON Sequencing Bach reactors were started, and 67ppm NO2 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/m3/d. Meanwhile, the SBR2 with NO2 addition showed a removal efficiency of 67.5±6.2%, with a removal rate of 0.277±0.017 kgN/m3/d. The SBR2 had a higher removal efficiency and rate than the SBR1. The continuous addition of trace NO2 into the CANON Sequencing Bach Reactor allows conventional aerobic ammonia oxidation with O2 as the electron acceptor and ammonia oxidation of with NO2 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.:

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