Publications Nationales

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Author: search.filters.author.Louhab, K.Subject: search.filters.subject.Surfactants

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    Assessment Of The Environmental Impacts Resulting From The Presence Of Surface Agents In The Discharge From An Urban Water Cleaning Station In Algeria By The Life Cycle Assessment Method
    (ALJEST, 2020) Belkhir, Meriem; Louhab, K.; Bougherar, S.
    The poor assessment of the environmental performance of water treatment systems led us to apply the life cycle assessment approach to a wastewater treatment plant. The purpose of our work is to evaluate the environmental impacts of the surfactants release from an existing urban wastewater treatment plant with a capacity of 35000 m3/inhabitant located in the city center of Boumerdés 45 km from the capital Algiers The article presents an evaluation of the environmental impacts of the surfactants release .This evaluation was established using Simapro8.1 software and the Midpoint ILCD version 1.03 methods. The results of evaluation show four impact categories are evaluated; - Human toxicity, Fresh water eutrophication, Marine eutrophication and Fresh water ecotoxicity. All the impact categories evaluated contribute to the surfactants fixed in the functional unit alcohol ether sulfate (AES), hexadecyl trimethyl bromide ammonium (CTAB) and Betaine of lauramidopropyl (BLP) of three different anionic, cationic and amphoteric types, respectively. Finally, we conclude from the results obtained that the value of the impact of ecotoxicity is the highest (3, 24E-4 CTUe) compared to the other impact categories whose impact category represents the impact significant.
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    Surfactants Elimination by biological pathway
    (ALJEST, 2018) Belkhir, Meriem; Louhab, K.; Boughera, S.; Remmi, H.
    Surfactants are major components of detergents and cosmetics; they are among the most undesirable pollutants in the environment because of their toxic effects on aquatic organisms. The main objective of this work is to define the elimination limits of the three different types of surfactants (anionic, cationic and amphoteric) by activated sludge. The results obtained were modeled by the model ASM1 (Activated Sludge Model N°1) in order to establish a better representation of the kinetic parameters such as the rate of disappearance of surfactant rs and the growth rate of the biomass rc. According to the classification based on biodegradation surfactants, the results obtained suggest that the AES is more degraded than the other surfactants with rs AES = 17.01 mg / lh at (cAES = 40 mg / l, T = 35 ° C) and rc AES = 1.42. mg / lh under the same conditions.