Abstract

Mass Balance is the application of conservation of mass to the analysis of physical systems by accounting for material entering and leaving the system. For this analysis mass can be flows and identified which might have been known through this technique. A mass balance study was conducted to know about the soil, plant and water relationship in the CW unit. The mass balance calculations comprised water and nutrient budget calculations to show the percentage distribution of water and nutrients such as N, P and K in constructed wetland. The distribution of water from the constructed wetland unit was observed to be contributed by evapotranspiration, outflow from the wetland and storage in soil with 1.78; 62.61 and 35.61% respectively. The reduction percentage of nutrient content (macro elements like nitrogen, phosphorous and potassium) present in domestic wastewater after treatment using constructed wetlands was observed to be 53% (total nitrogen) and out of this, 32% reduction is due to plant uptake (Phragmites australis) and 6% absorption is contributed by soil. For phosphorous, the results obtained from the analysis showed 52.6% soil accumulation and 49% plant uptake. For potassium 4% plant uptake and 46.9% soil accumulation was observed respectively. The pH in the range around 7.1 to 7.8 and so the contribution of ammonia volatilization low is observed. The water distribution in the CW unit was contributed by Input and output. Input in the unit comprised precipitation and wastewater inflow which contributes 2.6 and 97.39% respectively and the output comprised evapotranspiration and outflow of treated water from the wetland unit which contributes 1.78 and 62.61% respectively. 35.61% of water was observed to be stored in the soil of the constructed wetland unit.

中文翻译：

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人工湿地处理生活污水的质量平衡研究

摘要

质量平衡是通过考虑进入和离开系统的物质，将质量守恒应用于物理系统的分析。对于这种分析，质量可以是流动的，并且可以通过这种技术识别出来。进行了质量平衡研究，以了解 CW 单元中的土壤、植物和水的关系。质量平衡计算包括水和养分预算计算，以显示人工湿地中水和养分（如 N、P 和 K）的百分比分布。人工湿地单元的水分分布受蒸发蒸腾、湿地出流和土壤蓄水的贡献为 1.78；分别为 62.61 和 35.61%。养分含量（氮等常量元素，Phragmites australis ) 和 6% 的吸收来自土壤。对于磷，分析结果显示土壤积累率为 52.6%，植物吸收率为 49%。对于钾，分别观察到 4% 的植物吸收和 46.9% 的土壤积累。pH 值在 7.1 到 7.8 左右，因此观察到氨挥发的贡献低。CW 单元中的水分布由输入和输出贡献。该单元的输入包括降水和废水流入，分别占 2.6% 和 97.39%，输出包括蒸发蒸腾和来自湿地单元的处理水流出，分别占 1.78% 和 62.61%。观察到 35.61% 的水储存在人工湿地单元的土壤中。