Physico-chemical characterization of domestic wastewaters in the "Vie-Nouvelle" agglomeration, Cotonou, Benin

Abstract

Wastewaters are characterized by a high variability of flow and composition according to its origin. The objectives of this study were to evaluate the daily variation of the pollutants load from domestic wastewater in "Vie-Nouvelle" agglomeration in the city of Cotonou. In practice, samples were collected over 24 hours with one sample every hour, at the entrance of wastewater treatment plant of the agglomeration. Various parameters were measured at laboratory. Determination of methods specific to each parameter was used. The results show that these wastewaters are characterized by a great pollution variability during the diurnal period of day. The pollutant load showed the following variations : pH values ranging: 7.

Qualité physico-chimique des eaux littorales de la partie Sud-Ouest du Lac Albert, RD Congo

“…Many authors (Hade, 2003 ;Atinkpahoun, 2018 ;Gouasmia et al, 2016) agree on the facts that when there is increase of the temperature, the ions influencing the determination of matter in suspension in water increase, with as consequence the increase of the water conductivity, whose value depends on the nature of the substratum and exogenous and endogenous contributions (Scheneider, 2001;Yapo Ossey et al, 2008;Tang et al, 2014). The average temperature of the Albert Lake was higher than that of the other three lakes found in the Eastern part of the DRC, in the Albertin rift.…”

Effet de la charge hydraulique appliquée sur le fonctionnement d’un marais artificiel à drainage vertical planté avec <i>Panicum maximum</i> traitant des eaux domestiques

“…Les eaux usées non traitées ou partiellement traitées génèrent de nombreux effets négatifs sur les milieux récepteurs tels que l'eutrophisation ou la transmission de germes pathogènes (Atinkpahoun et al, 2018). Cette situation affecte durablement la biodiversité de ces milieux et, le cas échéant, leur utilisation.…”