Browsing by Author "Benoudjit, Fouzia"

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    Caractérisation et valorisation des boues issues d'un office d'assainissement : cas ONA Boumerdès(STEP Boumerdès)
    (2016) Benoudjit, Fouzia
    Le travail présenté dans cette thèse s'inscrit dans une optique de développement durable et de préservation de l'environnement.Son objectif est d'identifier les alternatives qui permettent une meilleure gestion des boues d'épuration des eaux usées urbaines en l'occurrence les boues de la station d'épuration de Boumerdès. La méthodologie d'étude ported'abord sur une caractérisationphysique et chimique saisonnière des boues afin d'étudier l'évolution temporelle de leurs compositions. Cette étape vise à définir le traitement le plus adéquat des boues pour la voie de valorisation choisie. Les résultats ont montré des points de similitudes mais aussi des différences notamment les teneurs en matières organiques et en métaux lourds. De plus la présence d'aluminosilicates rend ces boues intéressantes, pour leur utilisation dans les matériaux de construction, en les calcinant afin d'éliminer la matière organique qui peut avoir des conséquences négatives. La seconde partie de ce travail a concerné l'étudede la calcination des boues de 550?C à 1000?C afin d'évaluer l'influence du traitement thermique sur leurs compositions et de prévoir des valorisations adéquates dans le domaine de la construction.Les boues calcinées semblent, selon la température de calcination, être intéressantes pour une utilisation dans les matériaux cimentaires. La troisième partie de cette thèse est l'étude de la valorisation des boues calcinées comme substituants d'une partie du ciment dans le mortier afin d'évaluer son influence sur les performances mécaniques du matériau. Les résultats s'avèrent prometteurs en termes de résistances en flexion et en compression et dévoile même un taux de substitution optimum qui peut être extrapolé au béton ce qui constitue une avancée dans lagestion durable des boues en Algérie
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    Evaluation of the quality and composition of lemon (Citrus limon) peel essential oil from an Algerian fruit juice industry
    (TechnologyPublishingGroup,Research Laboratory of Food Technology, Faculty of engineering, University of Boumerdes / FSI, Frantz Fanon City, 35000 Boumerdes, Algeria, 2020) Benoudjit, Fouzia; Maameri, L.; Ouared, K.
    Lemon peel essential oil is used in food, medicines, cosmetics and perfumes, detergents, aromatherapy, pathogen inhibition, and insect control. The present work aimed to investigate the physicochemical characteristics and composition of the essential oil extracted from lemon grown in Algeria. The essential oil was obtained by cold-pressing from lemon peels which lemon barks are waste from an Algerian fruit juice industry. The physicochemical properties of the essential oil were determined. Essential oil was also characterised by FTIR-ATR and by GC-MS. The obtained physicochemical properties results revealed that lemon peel essential oil was a pale yellow aromatic liquid which was miscible in ethanol. It had an approximate pH of 6, a specific gravity of 0.894, a refractive index of 1.475 and an acidic value of 2.10 mg KOH/g. The FTIR spectrum revealed the presence of alkanes, alkenes, aromatic compounds and alcohols. A total of thirty-nine chemical compounds were identified based on GC-MS analysis of the lemon peel essential oil with a variation of percentage. These compounds are dividing in three different chemical classes (monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpenes and others). The results showed that the monoterpene hydrocarbons are the most abundant ones in the cold pressed lemon peel essential oil which represent about 93% of the total essential oil. The major constituent was α-limonene (~ 65%) and the main aldehydes were geranial (~ 2%) and neral (~ 1%).
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    Evaluation of trace metals in sewage sludge from a wastewater treatment plant with perspective of valorization
    (University M'hamed Bougara Boumerdes, 2015) Benoudjit, Fouzia; Hachemi, M.
    The increasing quantities of sewage suldge from wastewater treatment plants (WWTP) is a great source of worry especially concerning their impact on the environnment. Managing such sludge is the basis for a successful general sanitation scheme. The present work subject matte ris the evaluation of pollutants present in the sewage sludge(SS) recovered from urban wastewater treatment plant of the town of Boumerdes wich is treated wastewater from three(03) towns : Boumerdes- Corso- Tidjelabine, Algeria
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    Extraction and characterization of essential oil and hydrolate obtained from an algerian lemongrass (cymbopogon citratus)
    (2019) Benoudjit, Fouzia; Hamoudi, Imene; Aboulouz, Asmaa
    Lemongrass (Cymbopogon citratus) is a medicinal plant which largely uses in popular medicine. It has cultivated for the commercial production and used in pharmaceutical, cosmetics and food industries. The aim of this work was to characterize lemongrass essential oil and hydrolate. The lemongrass was cultivated and grown under Algerian ecological conditions. The essential oil and hydrolate were obtained from leaves of lemongrass by hydrodistillation on an industrial scale (yield: 0.8 %). The physicochemical properties of the essential oil were investigated to determine its quality. The lemongrass essential oil and hydrolate were then analysed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). The lemongrass essential oil was also analysed by gas chromatographic coupled with mass spectrometry (GC/MS) for the determination of its chemical composition. The essential oil was pale yellow aromatic liquid which was non soluble in ethanol. Lemongrass essential oil and hydrolate exhibited approximate pH, relative densities and refractive indexes of 4 and 6, 0.891 and 0.998, 1.488 and 1.333, respectively. The lemongrass essential oil acid value, iodine value, and peroxide value were 1.402 mg KOH/g, 69.80 g/100 g and 3 meq O2/kg, respectively. FTIR spectra of both essential oil and hydrolate showed the presence of alkanes, alkenes, aldehydes, alcohols, carboxylic acids. Ethers and aromatics appeared in the essential oil only. The GC-MS analysis revealed nineteen components in lemongrass essential oil which are belonging to five different chemical classes (monoterpenes, oxygenated monoterpenes, sesquiterpenes, oxygenated sesquiterpenes, diterpenes and others). The oxygenated monoterpenes are the most abundant chemical class (92.33%). Lemongrass essential oil has Isogeranial (41.77%), Neral (43.75%), β-Pinene (5.77), Geranial (3.78%) and Isoneral (1.90%) as major compounds.
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    Mechanical performance study of mortars containing local sewage sludge ash
    (2019) Benoudjit, Fouzia; Hachemi, M.
    The amount of sewage sludge from wastewater treatment plants is continuously increasing and becoming a serious issue for environment. Therefore, the valorisation of sewage sludge in sectors such as the construction field where there is high demand for naturel resources would be great for the environment. The present work reports the possibility of using sewage sludge ash as substitute for cement CEM II/A-P 32.5 R in mortars. Various ratio of sewage sludge ash (10%, 20% and 30%) was used in addition to cement, and mechanical attributes of resulting mortars, were tested at various curing ages and compared with control samples. The obtained results have revealed that sewage sludge ash can be used as a substitute of part of the cement in mortar and. The substitution can be as high as 30% while maintaining a compressive strength within the standard NF EN 197-1 requirements at 28 days.
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    Polycopié de cours de chimie pharmaceutique : ce polycopié est destiné aux étudiants inscrits en première année master (M1) spécialité chimie organique
    (Université M’hamed Bougara de Boumerdes : Faculté des Sciences : Département de Chimie, 2024) Benoudjit, Fouzia
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    Seasonal characterisation of the local sewage sludge
    (Parlar Scientific Publications, 2016) Benoudjit, Fouzia; Benoudjit, Mohamed Amine; Hachemi, Messaoud