| 运行条件下潜流型人工湿地溶氧状态研究 |
| 摘要点击 3743 全文点击 1853 |
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| 中文关键词 湿地 潜流型 氧 分布 |
| 英文关键词 wetlands subsurface flow oxygen distribution |
| DOI 10.13227/j.hjkx.20061015 |
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| 中文摘要 |
| 人工湿地是一项水质净化效果好，建造、运行费用低的生态污水处理技术，日益受到重视。但人工湿地中氧环境具有一定的特殊性，对污染物的去除有较大影响，目前尚缺少对湿地氧分布的系统研究，制约了湿地净化效率的提高。论文研究了种有多种植物的水平推流式潜流湿地处理污水厂初沉池出水的运行特性和氧分布状况，较全面的研究了人工湿地氧的空间分布和时间变化规律。研究结果表明，人工湿地中氧浓度普遍较低，其空间分布呈现两边低、中间高的规律，垂直方向上沿层下降；其时间变化规律为夏季＞春季＞秋季＞冬季，一天中14时氧浓度最高，上午高于下午。五种湿地植物的供氧能力比较结果为芦苇＞美人蕉＞茶花＞富贵竹＞空心菜。试验表明人工湿地氧环境的研究有利于揭示湿地内部的净化机理，提高湿地的净化效率，具有一定的理论研究价值。 |
| 英文摘要 |
| The constructed wetland is an ecological sewage treatment with good removal effects and low construction and operation cost. However, the oxygen condition in constructed wetlands is of particularity and affect removal effects of wetlands. For the lack of systematical study on oxygen condition of wetlands, the further development of wetlands is disturbed to some extent. In this paper, horizontal flow wetlands with various kinds of plants grown were first studied on their operation characteristics and oxygen condition in treating the sewage out from the primary sedimentary basin. The rules of oxygen condition changed with space and time were studied. Researches showed the oxygen concentration was low in wetlands, and it appeared as a rule that low in both ends, but high in middle of beds. It descended in upright direction. The oxygen concentration changed with seasons as summer＞spring＞autumn＞winter. In one day, the highest oxygen concentration appeared on 14:00, and tne concentration was higher in forenoon than afternoon. Reed＞canna＞camellia＞dracaena sanderiana＞ipomoea aquatica forsk by comparison of ability of oxygen supply. Experiments demonstrate that the study of oxygen condition in constructed wetlands is propitious to reveal the purifying mechanism of wetlands and improve the purifying efficiency. |
