Effects of La, Ce on nitrogen removal in sequencing batch reactor

doi:10.1007/s11783-009-0036-1

Front.Environ.Sci.Eng.

2009, Vol. 3

Issue (3) : 369-374 https://doi.org/10.1007/s11783-009-0036-1

Research articles

Effects of La, Ce on nitrogen removal in sequencing batch reactor

Qing XIA ¹, Rui LIANG ², Yuning HONG ², Lili DING ², Hongqiang REN ², Yuxiang MAO ³, Mingyu ZHAO ⁴,

1.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China；China National Environmental Monitoring Center, Beijing 100012, China; 2.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China; 3.Jiangsu Jiangshan Pharmaceutical Co., Ltd., Jingjiang 214500, China; 4.Grandway Technology International Co., Ltd., Beijing 100102, China;

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Abstract Batch experiments were conducted to study the short-term biological effects of rare earth ions (La³⁺, Ce³⁺) and their mixture on the nitrogen removal in a sequencing batch reactor (SBR). The data showed that higher NH⁺₄―N removal rate, total inorganic nitrogen removal efficiency, and denitrification efficiency were achieved at lower concentrations of rare earth elements (REEs) (<1mg/L). In the first hour of the aeration stage of SBR, the presence of REEs increased the total inorganic nitrogen removal efficiency and NH⁺₄―N removal efficiency by 15.7% and 10%―15%, respectively. When the concentrations of REEs were higher than 1mg/L, the total inorganic nitrogen removal efficiency decreased, and nitrate was found to accumulate in the effluent. When the concentrations of REEs was up to 50.0mg/L, the total inorganic nitrogen removal efficiency was less than 30% of the control efficiency with a high level of nitrate. Lower concentrations of REEs were found to accelerate the nitrogen conversion and removal in SBR.

Keywords rare earth La³⁺ Ce³⁺ inorganic nitrogen nitrogen removal sequencing batch reactor

Issue Date: 05 September 2009

Cite this article:

Qing XIA,Yuning HONG,Hongqiang REN, et al. Effects of La, Ce on nitrogen removal in sequencing batch reactor[J]. Front.Environ.Sci.Eng., 2009, 3(3): 369-374.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-009-0036-1
https://academic.hep.com.cn/fese/EN/Y2009/V3/I3/369

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