期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：4
页码：1145-1153
出版社：University of Mohammed Premier Oujda
摘要：This paper studies the impact that wastewater treatment stations in Yemen have on the environment and society, the high degree of pollution and the lack of concern of the authorities in this regard. It goes on to list the characteristics of the natural environment in which the wastewater treatment plant located in the capital Sana'a operates, as well as the areas surrounding that territory. The area's specific climatic conditions - warm and dry - make treatment plants for large cities a necessity, and the use of wastewater in agriculture for irrigation and of sludge as fertilizers. This location was chosen for the study as it is located in a heavily populated area, in the vicinity of which farming takes place, and because it is an area with significant historical sites of major tourist interest. The following presents the study materials and methods used. For the conduct of the study we have worked in collaboration with a group of specialists in the field, with representatives of local and central authorities and with citizens residing in the area. We have set the perimeter within which samples were taken for analysis and the area of investigation of the environmental impact by means of questionnaires. We have used the instruments and equipment found in the treatment stations' laboratories at Sana'a University - Faculty of Agriculture and those of the National Laboratory for Water and Environmental Quality Control. Chemical, physical and microbiological analyses were conducted in these laboratories following specific methodologies, and the results were analyzed and interpreted in accordance with the objectives of the study. It presents the results of the field analyses, in which questionnaires filled in by the local community were used, and the results of the chemical and biological analyses carried out on different wastewater samples from different sources. The analyses were performed in the station's laboratory according to the standards and specifications in force. The study found that negative results were prevalent if high proportions of Sr, Ni, Pb, Cu, Co, Cd, Zn were shown. These results largely explain the phenomenon of environmental pollution and presents conclusions and recommendations for considerable improvements to the existing situation.
