标题：Contribution of the Principal Component Analysis (PCA) to the evaluation of the physico-chemical pollution of raw wastewater from the city of Khenifra -Morocco
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：9
页码：2583-2595
出版社：University of Mohammed Premier Oujda
摘要：The present study aimed to characterize raw wastewater of Khenifra city (Morocco), to evaluate pollution in relation to the demo graphic and socio -economic profiles of the population connected to the network sanitation, and interpreting the results with the contribution of ACP. The physico-chemical characterization of raw wastewater revealed that liquid effluents are loaded with organic matter in terms of COD (COD average = 556.02 mg/L) whether a load of 3373.94 kg/day, a BOD 5 (Avg. = 284.55 mg/L) with a load of about 1731.20 kg /day. TSS (Avg. = 239.20 mg/L) whether a load of about 1457.04 kg/day, and mineral expressed in terms of electrical conductivity (Avg. = 1801 .61 μS/cm) with a pH of 8.13. The mean levels of total phosphorus and TKN are of the order of 94.07 mg/L and 12.17 mg/L, respectively. Although these wastewater has a high organic load (BOD 5 /COD = 0.51 and MES/BOD 5 = 0.85) they have satisfactory biodegradability. The exam of ratio COD/BOD 5 = 2.00 highlights the good biodegradability which biological treatment seems entirely appropriate. Statistical analysis of the results b y principal component analysis (PCA ) performed on 56 individuals and 9 variables (Flow rate, Temperature, EC, TSS, TKN, TP, COD, BOD 5 ) show the existence of a stro ng positive and significant correlation between the TSS, BOD 5 , COD and electrical conductivity. The factorial plan F1, axis of pollution, rep resents 42.44% of the variance. The second plan F2 represents only 2 5 . 24%
