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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Performance of two-stage batch loading inverse vertical subsurface flow constructed wetlands
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Performance of two-stage batch loading inverse vertical subsurface flow constructed wetlands

机译：两阶段批量加载反演垂直地下流人工湿地的性能

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Research was conducted on pilot-scale, two-stage batch-flow constructed wetland (CW) systems for domestic wastewater treatment. Synthetic domestic wastewater was treated in a pre-acidification reactor with a hydraulic retention time (HRT) of 3 hours and the average removal rate of chemical oxygen demand (COD) and ammonia-nitrogen (NH_4-N) reached 30% and 13.6%, respectively. The first-stage constructed wetland operated with up-flow and batch feed and drain. In the same year, under the conditions of 12h feed/12h drain, 6h feed and 6h drain and 3h feed/9h drain, with HRT of 3 days, COD removal rates kept the same level. But COD removals in the second year were greater than that of the first year under the same batch period. The first CW NH_4-N removal rates averaged 51% under the experimental conditions. The second-stage CW operated with down-flow, 12h feed/12h drain. Under maximum HLR of 10.5cm/d and OLR of 5.87gCOD/(m~2 • d) to 8.7 gCOD/(m~2 • d), COD removal averaged 73.3%; NH_4-N average removal exceeded 99%. The spatial variation of COD and NH_4-N in the first-stage CW demonstrated that entrainment of air during draining of constructed wetland could strengthen the removal of COD and NH_4-N. Temperature had no significant effect on COD degradation while obviously affected the removal of NH_4-N.
机译：在中试规模，两阶段分流人工湿地（CW）系统上进行了研究，以处理生活废水。在预酸化反应器中处理合成的生活废水，其水力停留时间（HRT）为3小时，化学需氧量（COD）和氨氮（NH_4-N）的平均去除率分别为30％和13.6％，分别。第一阶段的人工湿地上流，分批进水和排水。同年，在12h进料/ 12h排水，6h进料和6h排水以及3h进料/ 9h排水的条件下，HRT为3天，COD去除率保持相同水平。但是在同一批次期间，第二年的COD清除量高于第一年。在实验条件下，第一次连续波NH_4-N去除率平均为51％。第二级连续波在下流，12h进料/ 12h排放下运行。在最大HLR为10.5cm / d和OLR为5.87gCOD /（m〜2•d）至8.7 gCOD /（m〜2•d）下，COD去除率平均为73.3％。 NH_4-N平均去除率超过99％。第一阶段连续水化学需氧量和NH_4-N的空间变化表明，在人工湿地排水期间夹带空气可以加强对化学需氧量和NH_4-N的去除。温度对COD的降解没有明显影响，而明显影响了NH_4-N的去除。

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