Department of Water Resources and Sanitation, Environmental and Sanitary Engineering Centre, Federal University of Lavras, UFLA, Minas Gerais, 37200-000, Brazil.
Environ Sci Pollut Res Int. 2021 May;28(17):21314-21325. doi: 10.1007/s11356-020-11391-x. Epub 2021 Jan 7.
The purpose of this study was to analyze the effects of the application of multivariate criteria of principal components and hierarchical clustering as a mechanism for monitoring the performance of Tifton 85 grass (Cynodon spp.) planted in horizontal subsurface flow constructed wetland reactor (HSSF-CW) under different organic (OLR), nutritional and sodium loads of swine wastewater (SW). The HSSF-CW planted with Tifton 85 grass was used as a swine wastewater after treatment applying organic loading rates between 26.1 (1st cut) and 360.6 kg ha day COD (8th cut). The maximum performances of HSSF-CW consisted of 52.0 t ha of productivity and 24.0% of crude protein, with the application of 59.7, 64.2, and 31.2 kg ha day of TKN, P, and K, respectively. The eleven original variables generated four new components, with PC accounting for 94.0% of total variance, a condition strengthened with four data groupings greater than 48% similarity and three data groupings greater than 95% similarity between the variables. There was a strong association between of nitrogen, phosphorus, and potassium concentration by the hierarchical grouping and the intermediate cuts and lower temperatures.
本研究旨在分析多元主成分和层次聚类标准应用的效果，作为监测在不同有机负荷率（OLR）、营养和钠负荷下水平潜流人工湿地反应器（HSSF-CW）中种植的蒂夫顿 85 草（Cynodon spp.）性能的一种机制。水平潜流人工湿地反应器（HSSF-CW）种植的蒂夫顿 85 草用于处理猪废水，应用的有机负荷率在 26.1（第一次收割）和 360.6 kg ha 天 COD（第八次收割）之间。HSSF-CW 的最大性能包括 52.0 t ha 的生产力和 24.0%的粗蛋白，应用 59.7、64.2 和 31.2 kg ha 天的 TKN、P 和 K。11 个原始变量生成了四个新的成分，PC 占总方差的 94.0%，四个数据组之间的相似性大于 48%，三个数据组之间的相似性大于 95%。氮、磷和钾浓度之间存在很强的关联，通过层次分组和中间收割以及较低的温度。
