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篇目详细内容 |
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【篇名】 |
Effects of La3+, Ce3+ on nitrogen removal in sequencing batch reactor |
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【刊名】 |
Frontiers of Environmental Science and Engineering in China |
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【刊名缩写】 |
Front.Environ.Sci.Engin.China |
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【ISSN】 |
1673-7415 |
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【EISSN】 |
1673-7520 |
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【DOI】 |
10.1007/s11783-009-0036-1 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
3
卷3期 |
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【页码】 |
369-374
页,共
6
页 |
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【作者】 |
Qing XIA;
Rui LIANG;
Yuxiang MAO;
Yuning HONG;
Lili DING;
Hongqiang REN;
Mingyu ZHAO;
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【关键词】 |
rare earth; La3+; Ce3+; inorganic nitrogen; nitrogen removal; sequencing batch reactor |
【摘要】 |
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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) (<1mg/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 1mg/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 50.0mg/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. |
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