标题：Etude de la problématique de la présence de l’H2S dans le réseau d’assainissement de la ville basse de la ville de Mohammedia (Study of the problems related to the presence of Hydrogen Sulfide (H2S) in the sewer system in the lower district of the city of Mohammedia),
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：8
页码：2137-2147
出版社：University of Mohammed Premier Oujda
摘要：In this study, we evaluated the production of Hydrogen Sulfide (H 2 S) fro m a wastewater collection pond of a tannery company in the city of Mohammedia. We also examined the effects of untreated wastewater which was drained directly into the sea. The results showed that the quality of the wastewater changes considerably over time (April and May 2009). The analysis of the wastewater from the collection pond showed that the level of H 2 S pollution varies over time. The levels of COD fro m the tannery company's collection pond reach 28 g/l while sulfate concentration was at maximum values of 6876.9 mg / L. Furthermore, concentration of sulfides varied between 26.6 - 39.6 mg / L which was well over standard levels (0.1 - 10 mg / L). Concentrations of Hydrogen Sulfide from samples taken from different points varied depending on the site and also over time. A maximum concentration of about 50 mg / l was observed from the sampling points at Farhat Hachad and Port Street and 30 - 160 mg / L from the collection pond at the tannery company in Mohammed ia. Furthermore, during the summer H 2 S concentrations detected from several sampling points often reached 200 mg / L. This showed that the conversion of H 2 S to sulfate in the sewerage system favored an anaerobic environment which facilitates the release of bad odors. During the case study, the sulfide concentrations varied from one point to the other and also over time. The methane content from different wastewater supplies was high at the sample point located close to a delicatessen compared to other sampling points which were related to the anaerobic state in the sewer.
