Optimization of leachate nitrogen removal efficiency of a two-stage SBBCOR

LIU Yali; ZHANG Zhi; YAO Jingmei; HU Xueli; HUANGFU Xiaoliu; CHEN Min; ZHANG Mengqi; YANG Xinqi; ZHANG Yongheng; WANG Liguo

doi:10.13205/j.hjgc.202601005

Volume 44 Issue 1

Jan. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(1): 43-51

LIU Yali, ZHANG Zhi, YAO Jingmei, HU Xueli, HUANGFU Xiaoliu, CHEN Min, ZHANG Mengqi, YANG Xinqi, ZHANG Yongheng, WANG Liguo. Optimization of leachate nitrogen removal efficiency of a two-stage SBBCOR[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 43-51. doi: 10.13205/j.hjgc.202601005

Citation:

LIU Yali, ZHANG Zhi, YAO Jingmei, HU Xueli, HUANGFU Xiaoliu, CHEN Min, ZHANG Mengqi, YANG Xinqi, ZHANG Yongheng, WANG Liguo. Optimization of leachate nitrogen removal efficiency of a two-stage SBBCOR[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 43-51. doi: 10.13205/j.hjgc.202601005

Citation:

LIU Yali, ZHANG Zhi, YAO Jingmei, HU Xueli, HUANGFU Xiaoliu, CHEN Min, ZHANG Mengqi, YANG Xinqi, ZHANG Yongheng, WANG Liguo. Optimization of leachate nitrogen removal efficiency of a two-stage SBBCOR[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 43-51. doi: 10.13205/j.hjgc.202601005

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Optimization of leachate nitrogen removal efficiency of a two-stage SBBCOR

doi: 10.13205/j.hjgc.202601005

1. Key Laboratory of Monitoring, Evaluation and Early-Warning of Territorial Spatial Planning, Ministry of Natural Resources, Chongqing Institute of Planning and Design, Chongqing 401147, China;
2. Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 401147, China

Received Date: 2024-07-02
Available Online: 2026-02-26
Publish Date: 2026-01-22

Abstract

Abstract

A two-stage sequencing batch biological contact oxidation reactor （Ⅰ/Ⅱ-SBBCOR） was designed to deal with leachate and the difficulties in its biological nitrogen removal. The results showed that the biological contact oxidation process of “segmented + sequencing batch” can reasonably remove nitrogen from leachate. Hydraulic retention time （HRT） plays a crucial role in controlling the loss of biological substrates and biomass within the Ⅰ/Ⅱ-SBBCOR， as well as the timing of nitrification and denitrification reactions. The sequencing batch cycle （SBC） plays a crucial role in controlling substrate concentration gradients， hydraulic shock loads， diverse biological habitats， and microbial activity. Dissolved oxygen （DO） plays a decisive role in controlling the growth activity of nitrifying and denitrifying bacteria in nutrient/microaerophilic/anaerobic environments. Therefore， all the three are significant factors affecting the denitrification efficiency of the Ⅰ/Ⅱ-SBBCOR. The optimal operation condition for Ⅰ/Ⅱ-SBBCOR was as follows： HRT = 6 d/3 d， SBC = 6 h/6 h， DO=2.0 mg/L/2.5 mg/L，respectively. Under this condition， the nutrient ratio of effluent is more reasonable， which is beneficial to subsequent advanced treatment.
- two-stage,
- SBBCOR,
- leachate,
- denitrification efficiency,
- optimization test

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References(17)

References

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