Journal Articles

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    Comparative study of leachate treatment by coagulation-flocculation process using iron-based coagulants: A case study on Souk-Ahras city
    (Applied Research in Water and Wastewater, 2021-06-15) Saliha Bouranene; Khaled Djeffal; Lotfi Zeghadnia; Abdalhak GHEID
    The objective of this study was to evaluate the coagulation-flocculation process in the clarification of leachate from the landfill Technical Center of Souk-Ahras cityusing three coagulants based on iron: ferrous sulfate FeSO4.7H2O; ferrous chloride FeCl2.4H2O and ferric chloride FeCl3. The influence of some parameters namely pH leachate, dose and nature of coagulant and nature of flocculant was studied. The best treatment efficiency was obtained at 20 % of FeCl3 giving a turbidity of4.09 NTU with pH adjustment of the raw leachate at acidic pH (3.5 ± 0.2) before coagulant addition and at a basic pH (7.5 ± 0.2) after addition of coagulant. The iron valence and the nature of anion at which is linked, played a determinant role in the clarification of leachate. The treatments made with ferric chloride in the presence of a flocculant have proved that the starch was more efficient than lime giving abatement rates of 99 % for COD and 85 % for BOD5.
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    Enhancement of the free residual chlorine concentration at the ends of the water supply network: Case study of Souk Ahras city – Algeria
    (JOURNAL OF WATER AND LAND DEVELOPMENT, 2018-03-20) Mohamed A.; BENSOLTANE; ABD, Lotfi ZEGHADNIA; Lakhdar DJEMILI; Abdalhak GHEID; Yassine DJEBBAR
    The drinking-water supply sector has mostly targeted the water-borne transmission of pathogens. The most common method employed is the chlorination of drinking-water at treatment plants and in the distribution systems. In Algeria, the use of chlorine in drinking water treatment is a widespread practice. To enhance the concentration of the residual chlorine in the public water-supply system of a part of Souk Ahras city (Faubourg) (Algeria) known by its low concentration of the free residual chlorine (according to the water utility – Algérienne des Eaux: ADE investigation) especially at the point of use, practical steps were carried out. The method is a combination between numerical simulation using EPANET2 software and field measurements. Using statistical analysis the hydraulic model was calibrated and the observed values were very closer to the simulated results. The concentration was improved throughout the network after the injection of the appropriate dose.