Partial nitrification in an air-lift reactor with long-term feeding of increasing ammonium concentrations

Bioresource Technology
Li-Yuan ChaiZhi-Hui Yang

Abstract

The partial nitrification (PN) performance under high ammonium concentrations was evaluated in an airlift reactor (ALR). The ALR was operated for 253days with stepwise elevation of ammonium concentration to 1400mg/L corresponding nitrogen loading rate of 2.1kg/m(3)/d. The ammonium removal rate was finally developed to 2.0kg/m(3)/d with average removal efficiency above 91% and nitrite accumulation percentage of 80%. Results showed that the combined effect of limited DO, high bicarbonate, pH and free ammonia (FA) contributed to the stable nitrite accumulation substantially. The biomass in the ALR was improved with the inception of granulation. Precipitates on biomass surface was unexpectedly experienced which might improve the settleability of PN biomass. Organic functional groups attached to the PN biomass suggested the possible absorbability to different types of pollutant. The results provided important evidence for the possibility of applying an ALR to treat high strength ammonium wastewater.

References

Jul 28, 2004·Water Research·Katsuki KimuraNaoki Ohkuma
Jul 6, 2006·Journal of Biotechnology·C TrigoR Méndez
Aug 12, 2009·Water Research·Marlies J KampschreurMark C M van Loosdrecht
Sep 14, 2010·Water Research·Chong-Jian TangDa-Tian Wu
Nov 6, 2010·Environmental Science & Technology·Albert BartrolíJulián Carrera
Sep 4, 2012·Bioresource Technology·Lan WangJiqiang Zhang
Sep 10, 2013·Bioresource Technology·Ren-Cun JinWei-Min Ni

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Citations

Apr 20, 2017·Environmental Science and Pollution Research International·Hui LiuLiyuan Chai
Feb 23, 2018·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Minkyu ChoiHyokwan Bae
Sep 16, 2017·Environmental Technology·Haolong WangGeorge Nakhla
Aug 8, 2021·International Journal of Environmental Research and Public Health·Huaihao XuChun Hu

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