Autotrophic nitrogen removal by partial nitrification-anammox process in two-stage sequencing batch constructed wetlands for low-strength ammonium wastewater

2020 ◽  
Vol 38 ◽  
pp. 101625
Author(s):  
Ziyuan Lin ◽  
Fengying Xu ◽  
Yingmu Wang ◽  
Wei Huang ◽  
Jiong Zhou ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Partial Nitrification ◽  
Two Stage ◽  
Low Strength ◽  
Anammox Process ◽  
Autotrophic Nitrogen Removal

Completely Autotrophic Nitrogen-Removal for Treatment of High Ammonia Leachate

2010 ◽  
Vol 113-116 ◽  
pp. 662-665
Author(s):  
Wen De Tian ◽  
Kyoung Jin An ◽  
Zhi Wei Li
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Optimal Operation ◽  
Ammonium Concentration ◽  
Operation Condition ◽  
Partial Nitritation ◽  
Ammonium Removal ◽  
High Ammonia ◽  
Anammox Process ◽  
Autotrophic Nitrogen Removal

This study focused on the feasibility of autotrophic nitrogen removal to treat high ammonia leachate, using combined partial Nitritation and Anammox process. In partial nitritation reactor, the optimal operation condition was found with influent ammonium concentration of 1200 mg/L, DO about 3 mg/L, HRT 3 days and temperature about 31°C at the ratio of NO2-N / NH4-N effluent kept at 1.1, which is a prerequisite for the application of Anammox. In Anammox reactor, more than 85% ammonium is removed at HRT 8 days, temperature 28±1°C, and pH 8. The removal rate of nitrogen and COD in combined partial Nitritation and Anammox process are 90% and 74%, respectively. Thus, a combined process of partial nitritation and a subsequent Anammox could be an alternative solution for ammonium removal for leachate.

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