The experimental study was carried out on an urban wastewater purification station located in the region of El Oued -Kounine- in south-eastern Algeria. During 6 months, samples were taken every month to study the Physico-chemical parameters of this station. Monthly monitoring of SS, COD, BOD5 was made from September 2017 to February 2018 and the results obtained show that the average elimination rates were 77.76, 74.10 and 80% respectively for BOD5, DCO and SS. The average of the ratio COD/BOD5 during the 6 months of follow-up is equal to 2.9.
Controlling the quality of water distributed together with sound resource management is a factor of economic and social development. Also, the chemistry and knowledge of geological and hydrogeological aquifer, the object of this work, we identify the water quality examined through physical-chemical parameters. The study of these parameters more precisely the region of Biskra reveals a generally high mineralized whose origin is essentially the geological nature of enclosing land. However, the waters of the continental interlayer (Albian) are the chemical profile weakest; however, its high temperature makes it difficult to use both to supply drinking water as well as for irrigation. After synthesis of the results for different sheets (groundwater, Miopliocene, Eocene, Albian), the limestone is most interesting at least for drinking water, part of its rate of mineralization (medium), the acceptable temperature (24°C) and its relatively low salinity (1 to 3 g/l). However, these waters are not used directly for human consumption. They requires further treatment.
The chemical quality of several water samples comprised groundwater from various aquifers and water dam, in Biskra area of South Algeria was investigated. Water samples were collected to monitor water chemistry of major ions and minor ions comprising inorganic pollutants such as fluoride, phosphates, nitrates and trace element as cadmium. The results showed a high salinity associated with an excessive hardness. The concentrations of many inorganic compounds are above the permissible limits for standard drinking water in almost water sources. The pollution is mainly attributed to a geological origin and an extensive use of fertilizers. Some water need adequate treatment to overcome inorganic pollution problem for drinking purpose. The adsorption of fluoride, nitrate, phosphate and cadmium ions onto Algerian bentonitic clay was studied in batch system. The results showed that sulphuric acid activated bentonite was more efficient than raw clay for fluoride, nitrate and phosphate removal. The results also revealed that cadmium adsorption was better with raw bentonite. The equilibrium data were confirmed using Langmuir isotherm model.
This study is part of the more general framework for diagnosis of the quality of water resources in the Biskra area and its suitability for irrigation. This work reports the results of an analysis of physicochemical groundwater quality. Groundwater samples were collected from 12 boreholes in different aquifers exploited in the area, and used for drinking and domestic purposes. The results showed that the water of the limestone aquifer (Maastrichtian) is better than other aquifers (phreatic, Miopliocene, Lower Eocene). This affects more particularly the pH, conductivity (mineralization), total hardness, and concentration of the major elements. As far as the same aquifers (phreatic, Miopliocene, Lower Eocene), present water which classified mediocre highly mineralized for irrigation because EC > 2250 μS/cm (class 4). The Maastrichtian aquifer presents a poor water quality (class 3), according to the Riverside classification.
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