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| DOI：10.13522/j.cnki.ggps.2019219 |
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| Composite Ecological Purification System for Removing Contaminants in Water Flowing into Recreational Lakes |
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WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang,WANG Zhichao, LYU Weixiang, LI Weiping, YU Linghong*, YANG Wenhuan, WANG Zhan, WANG Gaoqiang
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School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
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| Abstract: |
| 【Objective】Wetland is an effective technology to remediate contaminated water and has been used to remove pollutants from waters flowing into recreational latkes in urban areas. However, a single small wetland might not be effective enough while multiple wetlands need a large amount of matrix. The purpose of this paper is to present an improved composite ecological purification system to resolve these problems.【Method】The proposed composite ecological purification system was an aerobic-anoxic, and it was constructed based on the micro-aerated single floating bed. We experimentally tested system. During the experiment, we measured removal COD, total nitrogen (TN), NH4+ and total phosphorus (TP ) from water flowing into a lake, and compared the results with results obtained from the control, a constructed wetland and a composite floating bed system. In all treatments, the hydraulic retention time was 2 days and the experiments were running for 24 days【Result】For the constructed wetland system, the composite floating bed system and the composite ecological purification system, their removal efficiency was 13.59%, 35.02%, 45.30% and 70.71% respectively for COD, 11.22%, 31.14%, 85.89% and 80.59% respectively for NH4+, 2.77%, 57.84%, 37.51% and 74.60% respectively for TP, and 30.98%, 32.75%, 8.13% and 60.07% respectively for TN. The proposed system significantly improved TN removal compared to the control.【Conclusion】The effluent from the system met the Class V standard for Surface Water Environmental Quality (GB 3838—2002). Operation of the proposed system was more stable and robust even under instant load increase. It improved denitrification and reduced phosphorus release. The results have implications for ecological control of exogenous pollutants in urban recreational lakes. |
| Key words: compound floating bed system; factitious stage wetland system; compound ecological purification system; inferior class V; contaminant interception |
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