Effects of carbon source on N2O production in the process of simultaneous nitrification and denitrifica-tion via nitrite by aerobic granular sludge

VIEWS - 603 (Abstract) 128 (PDF)
Hong Liang, Xue Li, Shanshan Wang, Dawen Gao


A sequencing batch reactor (SBR) was used to study the effect of carbon source (C6H12O6 and CH3COONa) and C/N ratio (C/N=4:1 and C/N=7:1) on the production of nitrous oxide (N2O) in the process of simultaneous nitrifica-tion and denitrification via nitrite (short-cut SND) by aerobic granular sludge and the removal efficiency of nitrogen under low dissolved oxygen (DO). The results showed that short-cut SND occurred in this system, and the removal ef-ficiency of total nitrogen (TN) at C6H12Oand CH3COONa were 28.93 % and 41.19 %, respectively. However, the production of N2O significantly increased when CH3COONa was used as a carbon source. In addition, the rate of N2O release when CH3COONa was a carbon source was 8.34 times the rate when C6H12Owas the carbon source. With the increase of C/N, removal rate of TN and the efficiency of the short-cut SND were increased. The removal efficiency of TN at C/N=7:1 was 90.33%, which was 2.19 times at C/N=4:1. The percentage of short-cut SND at C/N=4:1 and C/N=7:1 were 87.47% and 95.97%, respectively. The release rate of N2O from the original 1.14 mg/(g • min) decreased to 0.10 mg/(g • min) after increased the C/N from 4:1 to 7:1.


Carbon source; C/N ratio; Nitrogen removal; SND, Aerobic granular sludge

Full Text:



DOI: https://doi.org/10.26789/AEB.2016.02.002


  • There are currently no refbacks.

Copyright (c) 2016 Hong Liang, Xue Li, Shanshan Wang, Dawen Gao

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Cookies Notification