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首页> 外文期刊>Journal of Cleaner Production >Rural domestic wastewater treatment in constructed ditch wetlands: Effects of influent flow ratio distribution
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Rural domestic wastewater treatment in constructed ditch wetlands: Effects of influent flow ratio distribution

机译：人工沟湿地农村生活污水处理：进水流量比分布的影响

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Constructed wetlands (CWs) are a sustainable technology used to remove pollutants from wastewater; however, their low total nitrogen (TN) removal efficiency remains a pressing issue. Constructed ditch wetland systems (CDWs) differ from CWs in being narrow and shallow. This study observed the performance of CDWs throughout their operational period and investigated the causes of their low TN removal rates. To enhance TN removal, we propose an approach where the inflow is divided into two parts with different influent flow ratios. Four systems were trialed in parallel to examine the effects of the influent flow ratio distribution on organics removal and nitrogen transformation. A flow ratio of 1:2 was considered optimal following comparison of the four experimental CDWs. The removal efficiencies of chemical oxygen demand (COD) and TN in the control CDW (influent flow ratio 3:0) during winter were 91.15% and 25.87%, respectively, whereas the removal efficiencies of the best-performing CDW (influent flow ratio 1:2) were 91.59% and 50.40%, respectively. Based on an analysis of nitrogen transformation, a model of effluent TN and nitrate nitrogen concentration in the four CDWs was constructed. (C) 2019 Elsevier Ltd. All rights reserved.
机译：人工湿地（CW）是一种用于去除废水中污染物的可持续技术。然而，它们低的总氮（TN）去除效率仍然是一个紧迫的问题。人工沟湿地系统（CDW）与CW的区别是狭窄和浅。这项研究观察了CDW在整个运行期间的性能，并调查了其TN去除率低的原因。为了增强总氮的去除，我们提出了一种方法，其中将进水分成具有不同进水流量比的两个部分。并行试验了四个系统，以检查进水流量比分布对有机物去除和氮转化的影响。在对四个实验CDW进行比较之后，认为1：2的流量比是最佳的。对照CDW（进水流量比3：0）在冬季的化学需氧量（TND）去除效率分别为91.15％和25.87％，而表现最佳的CDW（进水流量比1）的去除效率分别为：2）分别为91.59％和50.40％。在分析氮素转化的基础上，建立了四个污水处理厂污水中总氮和硝态氮浓度的模型。 （C）2019 Elsevier Ltd.保留所有权利。

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