In:
IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 983, No. 1 ( 2022-02-01), p. 012099-
Abstract:
The emissions of NO and N 2 O during biological nitrogen removal harm the environment. In this study, a sequencing batch reactor (SBR) was used to treat ammonium-rich organic wastewater. The nitrogen transformation and characteristics of NO and N 2 O accumulation in typical cycles under different nitrification conditions were monitored, and the mechanisms of NO and N 2 O production in A/O-SBR were analyzed. The results showed that NO accumulated in the anoxic phase under a fixed concentration of organic carbon source during denitrification with nitrite as electron acceptor or nitrate as electron acceptor. NO production in the aerobic phase could be related to hydroxylamine oxidation and nitrite reduction caused by high ammonia nitrogen. The accumulation of N 2 O mainly occurred in the aerobic phase, and the cumulative concentration of N 2 O at the end of the four typical cycles was above 4.02 mg/L. N 2 O accumulation attributed to the inhibition of free nitrous acid (FNA) and NO, and electronic competition, which made N 2 O reductase ( N 2 OR ) activity insufficient, failing N 2 O reduction.
Type of Medium:
Online Resource
ISSN:
1755-1307
,
1755-1315
DOI:
10.1088/1755-1315/983/1/012099
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
2434538-6
