Laboratoire Of Genie Of Leau Et Of Lenvironnement

Mohammedia, Morocco

Laboratoire Of Genie Of Leau Et Of Lenvironnement

Mohammedia, Morocco
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Souabi S.,Laboratoire Of Genie Of Leau Et Of Lenvironnement | Aboulhassan M.A.,ENsA Al Hoceima | Kanbouchi I.,Laboratoire Of Geologie Appliquee Et Environnement | Chtaini A.,Laboratoire Of Geologie Appliquee Et Environnement
Eau, l'INDUSTRIE, les Nuisances | Year: 2012

The objective of this study is to characterize and assess the environmental impact of industrial textile rejections. The results show that the quality of wastewater varies considerably over time. Analysis of wastewater in the collection basin, which moves all of the plant effluent, shows a significant polluting load and variable over time. COD varied from 529 to 5 100 mg /l and suspended solids between 111.4 to 678.4 mg /l with loading averages 28.3 at 273.4 and 6 to 36.3 kg / hour respectively, and a high alkalinity (pH> 10). These waters are also loaded with materials organoazotées levels that fall between 17 and 81.25 mg /l, is a load of 0.9 and 4.35 kg / hour. The sulfate content varies between 429 and 5613 mg /l. In addition, the index of biodegradability (BOD5/COD: 0,08-1,7) indicates that this release is not biodegradable. This effluent is discharged to a sewerage network. This effluent, loaded on S2-and SO42- can cause corrosion of the sewerage system. Indeed, a significant concentrations of H2S and CH4 were detected in sewage systems wastewaters.


Khalil F.,Laboratoire Of Chimie Appliquee | Bouaouine O.,Laboratoire Of Chimie Appliquee | Chtioui H.,Laboratoire Of Chimie Appliquee | Souabi S.,Laboratoire Of Genie Of Leau Et Of Lenvironnement | And 2 more authors.
Journal of Materials and Environmental Science | Year: 2015

Coagulation -flocculation is among the techniques commonly used for the treatment of discharges of leachate from landfills. The present work shows the results obtained during the processing of leachate collected at the landfill of the city of Fez by the process of coagulation- flocculation using four coagulants such as: lime Ca(OH)2, ferric chloride FeCl3, the ferric sulfate Fe2(SO4)3 and aluminum sulfate Al2(SO4)3. The process efficiency is measured in terms of metallic elements, turbidity, sludge production and color removal. Treatment with lime Ca(OH)2 allowed a significant discoloration and turbidity removal of 99 % while producing a sludge volume of 647ml/l. As to treatment with FeCl3, the results showed a 75% removal of turbidity and low production of settled sludge (245 ml/l). Treatment with Fe2(SO4)3 has a 79 % reduction in turbidity and produces a volume of 264 ml/l of settled sludge which is close to that produced by FeCl3 (245 ml/l). Furthermore, Al2(SO4)3 having a turbidity removal of about 97 % and a volume of decanted sludge slightly lower than the product during the treatment with lime (568ml/l). Regarding the analysis of metallic elements, the results showed that a substantial removal of the metallic elements in particularly elements As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn and Sb. Treatment with lime has shown a greater or lesser affinity for Cr (90%) Fe (96 %) and Mn (99 %). The ferric chloride and ferric sulfate allows the elimination of most of the metal elements with a high affinity for Cd, Cu, Ni, Cr and Zn. The aluminum sulfate is very suitable for the removal of Nickel Pb, Cr, Zn, respectively 95 %, 94 %, 84 % and 93.


Taleb A.,Laboratoire Of Genie Of Leau Et Of Lenvironnement | Kanbouchi I.,Laboratoire Of Genie Of Leau Et Of Lenvironnement | Souabi S.,Laboratoire Of Genie Of Leau Et Of Lenvironnement | Chtaini A.,Laboratoire Of Geochimie Appliquee Et Environnement
Journal of Materials and Environmental Science | Year: 2015

In this study, we evaluated the production of Hydrogen Sulfide (H2S) from 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 H2S pollution varies over time. The levels of COD from 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 Mohammedia. Furthermore, during the summer H2S concentrations detected from several sampling points often reached 200 mg / L. This showed that the conversion of H2S 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.

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