Advanced nitrogen removal by pulsed sequencing batch reactors (SBR) with real-time control |
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Authors: | Yang Qing Peng Yongzhen Yang Anming Guo Jianhua and Li Jianfeng |
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Institution: | (1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100022, China;(2) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China |
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Abstract: | The feasibility of pH and oxidation reduction potential (ORP) as on-line control parameters to advance nitrogen removal in
pulsed sequencing batch reactors (SBR) was evaluated. The pulsed SBR, a novel operational mode of SBR, was utilized to treat
real municipal wastewater accompanied with adding ethanol as external carbon source. It was observed that the bending-point
(apex and knee) of pH and ORP profiles can be used to control denitrification process at a low influent C/N ratio while dpH/dt can be used to control the nitrification and denitrification process at a high influent C/N ratio. The experimental results
demonstrated that the effluent total nitrogen can be reduced to lower than 2 mg/L, and the average total nitrogen (TN) removal
efficiency was higher than 98% by using real-time controll strategy.
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Translated from Techniques and Equipment for Environmental Pollution Control, 2006, 7(12): 32–35 译自: 环境污染治理技术与设备] |
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Keywords: | pulsed SBR biological nitrogen removal oxidation reduction potential (ORP) pH real-time control |
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