Browsing by Author "Amrani, M."

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    Back propagation algorithm used for tuning parameters of ANN to supervise a compressor in a pharmachimical industry
    (2012) Benazzouz, D.; Amrani, M.; Adjerid, Smail
    This paper presents the retro-propagation algorithm for tuning the parameter of Artificial Neural Networks used by pharmachemical industry. The obtained numerical test results on lubrication and air circuits shown that the proposal improves the performance in terms of number of iterations and reliability of the models. BEKER Laboratories production line, is a Pharmaceutical production company located at Dar El Beida (Algiers-Algeria), was kept as the main target of this study. After careful inspection, the weakest and the strongest points of the system were identified and the most strategic equipment within the line (the compressor) was taken as the equipment of focus. From this specific point, failure simulations are most adequate and from this selected target, the designed system will be better positioned for failure detection during the production process. The efficiency of this approach is its fast learning, and its accuracy of detecting failure which is of the order of 10-3
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    Détermination quantitative et qualitative de l'impact de la teneur en matière sèche sur le potentiel du biogaz de la digestion thermophile de boues activées
    (Aljest, 2019) Maamri, Sarra; Amrani, M.; Amrani, M.
    La faisabilité de la digestion anaérobie des boues activées a été étudiée dans un digesteur en mode batch dans des conditions thermophiles (55 °C), l'effet de la teneur en matière sèche totale sur la stabilité du système et les performances du processus a été examinés et ce, afin d’optimiser la production du méthane. Pour cela, nous avons étudié huit digestions, qui ont été lancés avec des concentrations 8,25, 15,5, 36,65, 41,5, 49,6, 58,5, 69,6 et 150,8 g/L. Alors, durant 32 jours de digestion, les résultats obtenus ont montré qu’il y avait une relation proportionnelle entre le taux de matière sèche (8.25 à 69.6 g/l) et la production volumétrique du biogaz avec un stable rendement en méthane 0.69 l /g MVSr. Lorsque la teneur totale en solides était portée à 150,8 g / l, la reduction de la matière volatile solide (MVSr) et le rendement en méthane diminuent (0,49 l / g MVSr). En effet, à forte charge d’alimentation, l’efficacité de la conversion biochimique s’affaiblit à cause des limitations de transfert de masse et ou d’accumulations d’inhibiteurs.
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    Phosphate removal from water using activated carbon derived from ampelodesmos mauritanicus stems : equilibrium and kinetic studies
    (Desalination Publications, 2021) Benhathat, Amal; Amrani, M.
    This paper describes the synthesis and characterization of Ampelodesmos mauritanicus stem-derived activated carbon (AMSAC). The activated carbon was produced by phosphoric acid activation followed by carbonisation and was characterized by N2 adsorption–desorption isotherm, scanning electron microscopy, energy-dispersive X-ray analysis, and Fourier-transform infrared (FTIR) spec-troscopy. The sorption potential of AMSAC for the removal of phosphate ions from the water was investigated. The effects of contact time, initial pH, and initial phosphate concentration on the sorption process were studied. The optimum contact time and pH for removal of phosphate ions was 75 min and pH 6–7. The experimental data showed that AMSAC had a high Brunauer–Emmett–Teller surface area of 1,293 m2/g and abundant pores with a specific volume of 1.23 m3/g. FTIR analysis revealed various functional groups on the surface of the AMSAC, which can play an important role in the adsorption process. A Langmuir isotherm model fits the equilibrium data for the sorbent well compared to the Freundlich, Temkin, and Dubinin–Radushkevich isotherm models. The monolayer −3 sorption capacity of AMSAC for PO4 ions was determined to be 4.52 mg/g at 25°C. The experimental data were also modelled using the sorption kinetic models. It was found that the kinetic data were described better by the pseudo-second-order adsorption kinetic model. Therefore, AMSAC is a prom-ising low-cost phosphate sorbent that can be produced from plentiful and annually renewable plants
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    Synthesis and Characterization of Algeria Organo clays used for Elimination of Phosphate Anions from Aqueous Solution
    (Aljest, 2020) Bandou, S.; Amrani, M.; Bouras, O.
    This study is based on synthesis and characterization of three different clays (Sodic-bentonite noted 𝑁𝑎−𝐵𝑡 , Dialyl Dimethyl Ammonium Chloride-bentonite noted 𝐷𝐷𝑀𝐴−𝐵𝑡 and bentonite intercalated by Hexadecyl Trimethyl Ammonium Bromide or 𝐻𝐷𝑇𝑀𝐴−𝐵𝑡 .These three clay complexes were characterized by both 𝑋𝑟𝑎𝑦 diffraction (𝑋𝑅𝐷) and Fluorescence (𝑋𝑅𝐹)Scanning Electron Microscopy (𝑆𝐸𝑀), Fourier transform infrared spectroscopy (𝐹𝑇𝐼𝑅),textural measurements (𝐵𝐸𝑇 specific surface areas and porosities) and the cationic exchange capacity (𝐶𝐸𝐶). Corresponding obtained results confirm the good intercalation of the 𝑁𝑎−𝐵𝑡 by the two used surfactants at low concentrations ( 0.006𝑀 for 𝐻𝐷𝑇𝑀𝐴𝐵 and 0.007𝑀for 𝐷𝐷𝑀𝐴+). Obtained results give basal spacing values around 14.5 and 18.5𝐴 , respectively for verified two aims firstly: The originality of this research, secondly for minimized the production cost of the adsorbents. Adsorption kinetic study of phosphate ions (𝑃𝑂43−) on these three matrices was carried out using kinetic models of pseudo-first, pseudo-second-order and intraparticular diffusion. Results obtained at the studied conditions (room temperature 𝑇=25𝑜𝐶 ), ( acidic medium 𝑝𝐻=5.7) show clearly the good validity of the pseudo-second-order model which gives a better correlation coefficient both, for 𝐷𝐷𝑀𝐴−𝐵𝑡 (𝑅2=0.995) and 𝐻𝐷𝑇𝑀𝐴−𝐵𝑡 (𝑅2=0.999) compared to that obtained by 𝑁𝑎−𝐵𝑡 (𝑅2=0.990)The aim of this present study was to evaluate the feasibility of using chicken eggshells as low-cost biosorbentfor nickel(II) ions adsorption from aqueous solutions. In order to clarify the adsorption process, batch experiments were performed to study the effect of operating parameters such asbiosorbent dose (1-10 g/L), initial concentration of nickel ions (10-50 mg/L), contact time (5-120 min) and temperature (20-50 °C). To describe the adsorption equilibrium, the experimental data were analyzed by the Langmuir, Freundlich and Temkin isotherm models. The Freundlich model showed better representation of data (R2> 0.999).The maximum adsorption capacity Adsorption isotherms give adsorbed amounts of about 33 and 63 𝑚𝑔.𝑔−1 onto 𝐷𝐷𝑀𝐴−𝐵𝑡 𝐻𝐷𝐷𝑀𝐴−𝐵𝑡 complexes, respectively, and 14 𝑚𝑔.𝑔−1for 𝑁𝑎−𝐵𝑡 as reference adsorbent. These results indicated the adsorption of phosphate anions (𝑃𝑂43−) by the two