| 龙河人工湿地在北方冬季低温条件下的运行效率 |
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| 引用本文： | 姚东,冯雪丽,张保君,李凤银,宋洪涛,焦新莹,高志永.龙河人工湿地在北方冬季低温条件下的运行效率[J].环境工程,2022,40(1):148-154. |
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| 作者姓名： | 姚东 冯雪丽 张保君 李凤银 宋洪涛 焦新莹 高志永 |
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| 作者单位： | 1. 中持水务股份有限公司, 北京 100192; |
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| 摘 要： | 人工湿地有着建设及运营成本低、水质净化效果好等显著优点,在河道水质净化等领域受到广泛应用.但是由于冬季低温条件下运行效果不佳,制约了人工湿地在北方的推广应用.通过构建"物化预处理(高效沉淀池)+人工湿地(潜流湿地+表流湿地)"工艺模式的多级复合人工湿地(3万t/d),探究冬季低温条件下人工湿地结合冰封保温措施对龙河水质...
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| 关 键 词： | 多级复合人工湿地 冬季低温 植物组合 去除效率 |
| 收稿时间： | 2021-12-23 |
OPERATION PERFORMANCE OF LONGHE CONSTRUCTED WETLAND UNDER LOW TEMPERATURE IN WINTER IN NORTHERN CHINA |
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| Affiliation: | 1. CSD Water Service Co., Ltd, Beijing 100192, China;2. Bureau of Water Resources of Anci District,Langfang City, Langfang 065000, China |
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| Abstract: | Constructed wetland has been widely used in river water purification due to its lower construction and operation cost, at the same time it has a good water quality purification effect. However, the application of constructed wetland in north China is restricted for the poor operation effect under low temperature in winter. In this paper, a multi-stage composite constructed wetland project(30000 t/d) using the process combination of physicochemical pretreatment(high efficiency sedimentation tank)+constructed wetland(subsurface flow wetland+surface flow wetland was explored, and the effect of ice insulation measures on the water purification of Longhe River under low temperature in winter was studied. The operating efficiency of the constructed wetland system from December to January was analyzed. Through the study and analysis of the operation efficiency, the results showed that the Longhe constructed wetland system has high removal efficiency of COD, NH3-N, TP and SS, which was 49.06%, 77.72%, 57.95% and 38.73% respectively through certain heat preservation measures. In addition, the removal efficiency of NH3-N, TP and SS in the cattel-reed subsurface flow wetland was better than that in the reed-cattail subsurface flow wetland, with an increase of 3.2%, 11.1% and 6.7% percentage points, respectively. However, there was no significant difference in COD removal rate between the reed-cattel-cattail subsurface flow wetland and the cattel-reed subsurface flow wetland. It showed that different plant combinations had their own advantages in removing pollutants. In conclusion, the multi-stage composite constructed wetland had a better removal effect on pollutants, which can improve the operation efficiency of constructed wetland in winter under low temperature condition, and provide references for the promotion and application of constructed wetland in northern China. |
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