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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >The Effects of Aeration and the Application of the k-C~* Model in a Subsurface Flow Constructed Wetland
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The Effects of Aeration and the Application of the k-C~* Model in a Subsurface Flow Constructed Wetland

机译：曝气的影响及k-C〜*模型在地下流人工湿地中的应用

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摘要

Since the horizontal subsurface flow constructed wetland in Kodijarve, Estonia had problems with aeration, a vertical subsurface flow (VSSF) constructed wetland (CW) was built for the purpose of enhancing aeration. This article gives an overview of how the vertical subsurface flow constructed wetland has affected the aeration capacity and purification efficiency of the constructed wetland system in a one-year period of operation. The aeration capacity of the VSSF CW averaged 63.6 g O_2 m~(-2) d~(-1) during this one-year operational period, and aerobic processes occur more effectively in the system. An area of 0.5 m~2 pe~(-1) is most likely too small for sufficient aeration in cold climates, and the short water residence time in the VSSF CW also can hinder nitrification. Also, an analysis of the application of the k-C~* model in the horizontal subsurface flow part of the Kodijarve hybrid constructed wetland is presented for BOD, total nitrogen, ammonium and total phosphorus. The k-C~* model describes processes in the HSSF CW quite well. The k values are found to be smaller than reported in the literature, mainly because of the low hydraulic loading rates. Low k values in more oxygen dependent processes, such as BOD, N_(tot), and NH_4-N removal, also indicate insufficient oxygen supply in the system.
机译：由于爱沙尼亚Kodijarve的水平地下流动人工湿地存在通气问题，因此出于增强通气的目的，建造了垂直地下流动人工湿地（CW）。本文概述了在一年的运行期间，垂直地下流动人工湿地如何影响人工湿地系统的通气能力和净化效率。一年的运行期间，VSSF CW的通气量平均为63.6 g O_2 m〜（-2）d〜（-1），系统中的好氧过程更加有效。 0.5 m〜2 pe〜（-1）的面积很可能太小，不足以在寒冷的气候中获得足够的通气，而且在VSSF CW中短的水停留时间也会阻碍硝化作用。此外，还介绍了k-C〜*模型在Kodijarve混合人工湿地的水平地下流动部分中的应用，分析了BOD，总氮，铵和总磷。 k-C〜*模型很好地描述了HSSF CW中的过程。发现k值小于文献报道的k值，主要是因为水力加载率低。在更多依赖氧气的过程（例如BOD，N_（tot）和NH_4-N去除）中的低k值也表明系统中的氧气供应不足。

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