Advanced nitrogen removal by pulsed sequencing batch reactors (SBR) with real-time control |
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| Authors: | Qing Yang Yongzhen Peng Anming Yang Jianhua Guo Jianfeng Li |
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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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