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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >Nitrogen, Phosphorous, and Organic Carbon Removal in Simulated Wetland Treatment Systems
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Nitrogen, Phosphorous, and Organic Carbon Removal in Simulated Wetland Treatment Systems

机译：模拟湿地处理系统中的氮，磷和有机碳去除

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Effects of vegetation, wastewater drawdown, hydraulic retention time (HRT), and media depth on removal of nitrogen, phosphorous, and organic carbon in microcosms were investigated. Synthetic wastewater was added daily to 28 microcosms, and effluent was sampled every 12 days for 132 days. Effluent was analyzed for ammonium (NH4 +-N), nitrate (NO3 −-N), orthophosphate (PO4 3−-P), and total organic carbon (TOC). Average percent removal of NH4 +-N was significantly greater in microcosms containing plants (67%) than in those without plants (29%). Percent removal of PO4 3−-P was also significantly greater in microcosms with plants (42%) than in microcosms without plants (20%), but no significant difference was found for TOC removal between microcosms with plants (67%) and those without plants (74%). Average removal was significantly lower in microcosms with wastewater drawdown than in those without wastewater fluctuation for both NH4 +-N (51% versus 83%) and PO4 3−-P (14% versus 71%). Percent NH4 +-N removal was significantly greater in microcosms with a 6-day retention time (80%) than in those with a 2-day retention (53%), and PO4 3−-P removal was also significantly greater with a 6-day retention time (55%) than a 2-day retention (29%). No differences were seen in TOC removal due to any of the treatments but HRT, where removal was greater microcosms with a 2-day HRT (76%) than in those with a 6-day HRT (60%). Media depth did not have a significant effect on nutrient removal. Results of this study demonstrate that required design parameters are different depending on the nutrient being removed in systems simulated by these microcosms.
机译：研究了植被，废水排放量，水力停留时间（HRT）和介质深度对微观中氮，磷和有机碳去除的影响。每天将合成废水添加到28个缩影中，每12天对废水进行一次采样，共132天。分析了废水中的铵（NH4 + -N），硝酸盐（NO3 - -N），正磷酸盐（PO4 3 − - P）和总有机碳（TOC）。含有植物的微观世界中，NH4 + -N的平均去除百分率显着高于不含植物的微观世界（29％）。有植物的微观世界中PO4 3 − -P的去除率也显着高于无植物的微观世界中（42％），但是有植物的微观世界之间的TOC去除率没有显着差异。植物（67％）和没有植物的植物（74％）。 NH4 + -N和PO4 3 − -的废水排放量减少的微观世界的平均去除率均显着低于无废水波动的微观世界（分别为51％和83％）。 P（14％对71％）。保留6天（80％）的微观世界中的NH4 + -N去除率明显高于保留2天（53％）和PO4 的微观世界保留6天（55％）的3−-P去除率也显着高于保留2天（29％）的3 -P去除率。除HRT以外，其他任何处理均未观察到TOC去除的差异，HRT处理2天（76％）的缩影大于6天HRT（60％）。培养基深度对营养去除没有显着影响。这项研究的结果表明，所需的设计参数会有所不同，具体取决于在这些微观世界模拟的系统中要去除的营养素。

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    R. G. Hunter; D. L. Combs; D. B. George;

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    Department of Biology 1100 N. Dixie Ave. Box 5063 Tennessee Technological University Cookeville Tennessee 38505 USA;

    Department of Biology 1100 N. Dixie Ave. Box 5063 Tennessee Technological University Cookeville Tennessee 38505 USA;

    Center for the Management Utilization and Protection of Water Resources Tennessee Technological University Cookeville Tennessee 38505 USA;

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