ZHAOYu-ying,LIBei-ying,HUANGYi-kun,et al.High-rate Nitrogen Removal from Urban Wastewater Using Nitritation and Anaerobic Ammonium Oxidation[J].China Water & Wastewater,2024,40(13):1-6.
High-rate Nitrogen Removal from Urban Wastewater Using Nitritation and Anaerobic Ammonium Oxidation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第13期
Page:
1-6
Column:
Date of publication:
2024-07-01
- Abstract:
- To promote low-carbon and efficient nitrogen removal from urban wastewater, a two- zone sequential batch nitritation and Anammox technology was proposed. By establishing a bottom Anammox granular sludge zone and an upper floc sludge nitritation zone, high-rate nitrogen removal was achieved. Under the conditions of no organic matter in the influent, ammonia nitrogen concentration of 58.18 mg/L, and hydraulic retention time of 1.66 hours, the nitrogen removal rate reached 675 mg/(L-d), with an effluent total nitrogen concentration of 13.19 mg/L. Metagenomic results indicated that the relative abundance of ammonia-oxidizing bacteria (AOB) in the floc sludge was 14.70%, while the abundance ratio of AOB to nitrite-oxidizing bacteria (NOB) was 10.77, with a nitrite accumulation rate (NAR) of 81%. The relative abundance of Anammox bacteria in the granular sludge was 23.22%, and the total nitrogen removal rate was 7.53 mg/(gMLSS·h). This technology, with its high nitrogen removal rate and small footprint, is expected to provide a new technical option for reducing pollution and carbon emission in upgrade of wastewater treatment plants in urban centers with limited land availability.
Last Update:
2024-07-01