Publications Scientifiques

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    Heterotrophic denitrification of contaminated groundwater using arachis hypogaea. l shell as carbon source
    (ALJEST, 2020) Benbelkacem, Ouerdia; Benrachedi, K.; Boumechehour, F.; Alioua, C.
    In this research, agricultural waste, Arachis hypogaea.L shells (peanut shells) was investigated for use as carbon source and biofilm carrier to remove nitrate from groundwater in batch reactor laboratory. The feasibility of heterotrophic denitrification of a high nitrate concentration groundwater using a natural carbon source was studied, a series of batch tests was performed with synthetic groundwater to exanimate the effects of various environmental and operational factors such as temperature, pH, initial nitrate concentration and finally the mass of powder of Arachis hypogaea.L shells on the rate of heterotrophic denitrification. A range of physic chemical analysis was performed including: Infrared, granulometry, spectroscopy atomic absorption and Scanning Electron Microscope (SEM).Decreasing initial pH decreased denitrification; however, increasing pH had little effect on denitrification rates. Using Arachis hypogaea.L shells as organic substratum of varying size classes, we found that finer-graine showed higher rates of denitrification compared to large grains, likely due to increased surface area per volume of substratum.Our findings suggest that Arachis hypogaea.L shell play an important role in N removal because they gave a reduction percentage of 90%
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    Removal of nitrates in wastewaters
    (2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, Salima
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    Extractive purification of hydro-treated gas oil with N-methylpyrrolidone
    (Serbian Chemical Society, 2017) Bedda, Kahina; Hamada, Boudjema; Kuzichkin, Nikolay V.; Semikin, Kirill V.
    The purification of hydro-treated gas oil by liquid–liquid extraction with N-methylpyrrolidone as solvent was studied. The results showed that this method, under appropriate experimental conditions, reduced the sulphur con­tent of the gas oil from 174 to 28 ppm, the nitrogen content was decreased from 58 to 15 ppm, the aromatics content was diminished from 27.1 to 13.8 % and the polycyclic aromatic hydrocarbons were totally extracted. The obtained refined gas oil could be used to produce clean diesel fuel, thus protecting the environ­ment
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    Novel approach for the ammonium removal by simultaneous heterotrophic nitrification and denitrification using a novel bacterial species co-culture
    (Springer, 2016) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-Eddine; Khemili-Talbi, Souad
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    Comparison of biological nitrate reduction effectiveness of two strains isolated from activated sludge
    (Chemical Publishing, 2016) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-Eddine
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    Biological denitrification heterotrophe of water with fixed biomass using alfa stems as energy source
    (2010) Belouanas-Benbelkacem, O.; Benrachedi, K.
    This work presents the results optimization of the biological process denitrification with fixed biomass using a consumable support (Alfa Stem). In the first part, the influence of hydrolyc and volumic load to value the capacity of nitrate purification in a down flow submerged bio filter was analyzed. Then with an experimental design approach, we have analyzed the qualitative and quantitative aspects of the effects of some factors: concentration of nitrate (80-200 mg L-1) and velocity (0.3-1.0 m h-1) on different responses like the apparent rate of denitrification, as well as concentration of nitrite, nitrate and chemical demand on oxygen in the reactor outlet