YU Li-ping,YUAN Lin-jiang,WANG Ru,et al.Sulfate Utilization Characteristics and Denitrification Performance of Anammox Process[J].China Water & Wastewater,2021,37(15 15):1-7.
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Sulfate Utilization Characteristics and Denitrification Performance of Anammox Process

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 15 15 Page: 1-7 Column: Date of publication: 2021-08-01
Author(s):
YU Li-ping1; 2; 3; YUAN Lin-jiang1; 2; 3; WANG Ru1; 2; 3; YUAN Lin-jie1; 2; 3
(1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Shaanxi Key Laboratory of Environment Engineering, Xi’an 710055, China; 3. Key Laboratory of Northwest Water Resources and Environment Ecology , Xi’an 710055, China)
Keywords:
Anammox; sulfate; denitrification performance; AOB; NOB
Abstract:
Anammox sludge was used as the seed sludge, and SO2-4 was used to replace NO2--N as the electron acceptor to domesticate the sludge and oxidize NH4+-N. After the reactor was operated for 180 days, the change of ammonia nitrogen removal in the system was similar to that of Anammox bacteria activity. The overall ammonia nitrogen removal of the system was more than 40 mg/L, but sulfate was not removed. It was concluded that SO2-4 could not be used as an electron acceptor to oxidize NH4+-N, and there might be other electron acceptors to oxidize and remove NH4+-N. Adding 5 mmol/L hydroxylamine to the reactor could promote the removal of ammonia nitrogen, indicating that the removal of ammonia nitrogen was related to the activity of Anammox bacteria. The abundance of Candidatus Brocadia and Candidatus Jettenia in the reactor increased from 2.40% to 15.63%; the abundance of Nitrosomonas increased from 0.03% to 6.32%; the abundance of Nitrobacter increased from 0.12% to 1.54%, and the activity of AOB was greater than that of NOB. The change in the number of bacteria indicated that the removal of ammonia nitrogen in the reactor was related to the activity of AOB, NOB and Anammox bacteria. In batch experiments, after a trace amount of oxygen was injected into the reaction flask, the removal of ammonia nitrogen was significantly related to the nitrification of AOB and NOB and the activity of Anammox bacteria. It was speculated that the removal of ammonia nitrogen in the reactor was related to the amount of internal dissolved oxygen.
Last Update: 2021-08-01