Génie des procédés / هندسة الطرائق http://dspace.univ-constantine3.dz:8080/xmlui/handle/123456789/63 2026-04-21T14:57:54Z 2026-04-21T14:57:54Z Sadrati, Ikhlass Bougriou, Malak Benoudina, Ahmed Zakaria Kheireddine, Bani http://dspace.univ-constantine3.dz:8080/xmlui/handle/123456789/6262 2026-02-22T11:36:25Z 2025-01-01T00:00:00Z

Title: Optimisation de la digestion anaérobie par plan d'expérience Authors: Sadrati, Ikhlass; Bougriou, Malak; Benoudina, Ahmed Zakaria; Kheireddine, Bani Abstract: In the context of energy transition and sustainable waste management, this study aims to optimize the anaerobic digestion process of tomato residues, an abundant and biodegradable organic substrate. A scientific methodology based on a Box-Behnken experimental design combined with a two-factor interaction model (2FI) was adopted to rigorously assess the effect of three key variables: pH (6, 7, 8), dilution rate (0 / 25% / 50%), and volatile solids (TVS) ratio (0.16 / 0.33 / 0.5). Experimental results revealed that these parameters significantly influence biogas production. The best performance was observed at pH 6, a dilution rate of 25%, and a TVS ratio of 0.33. Statistical analysis (ANOVA) confirmed the validity of the proposed model and highlighted meaningful interactions between the studied factors. This work provides a better understanding of the optimal operational conditions for anaerobic digestion and offers a reliable predictive tool for future applications. The study represents a valuable contribution to the energetic recovery of organic waste, supporting the goals of circular economy and sustainable development.

2025-01-01T00:00:00Z Kermani, Lina Kharrab, Lyna Laribi, Lina Mansouri, Noura http://dspace.univ-constantine3.dz:8080/xmlui/handle/123456789/6261 2026-02-22T09:20:02Z 2025-01-01T00:00:00Z

Title: Production de bioéthanol et de compost à partir de matière organique Authors: Kermani, Lina; Kharrab, Lyna; Laribi, Lina; Mansouri, Noura Abstract: This work aims to valorize Algerian red beetroot as a biomass source for the production of bioethanol through alcoholic fermentation using Saccharomyces cerevisiae. The study focused on two key process parameters: the effect of acid hydrolysis of the substrate and the initial concentration of fermentable sugars, with the goal of optimizing ethanol yield. In parallel, the solid residues resulting from the fermentation were recovered and treated through aerobic composting, as part of an integrated valorization approach. The resulting compost was characterized by physico-chemical analyses (pH, moisture, C/N ratio) to assess its stability and maturity. Experimental results showed that acid hydrolysis significantly improves sugar conversion into ethanol, and that the initial sugar concentration strongly influences fermentation efficiency. This approach demonstrates the feasibility of a coupled bioethanol/compost process on a small scale, aligned with sustainable development and rational management of agricultural waste.

2025-01-01T00:00:00Z Ferhati , Lamis Harouni, Aya Boucheffa , Dhikra Khadraoui , Fatiha http://dspace.univ-constantine3.dz:8080/xmlui/handle/123456789/6259 2026-02-22T11:27:42Z 2025-01-01T00:00:00Z

Title: Élimination de polluants organique polluants organiques par adsorption par adsorption sur des bio-adsorbants naturels Authors: Ferhati , Lamis; Harouni, Aya; Boucheffa , Dhikra; Khadraoui , Fatiha Abstract: The significant rise in the cost of conventional adsorbents used in wastewater treatment has prompted growing interest in the development of low-cost, sustainable alternatives derived from renewable resources. This study investigates the valorization of agro-waste materials—specifically potato peels and orange rinds—as bioadsorbents for the removal of methylene blue, a model cationic dye commonly found in industrial effluents.The biosorbents were evaluated in both raw and chemically activated forms (using phosphoric acid) to enhance the density of active binding sites and improve adsorption efficiency. A parametric study was conducted to assess the influence of key operational factors, including contact time, biosorbent dosage, and solution pH, on dye removal performance. Batch adsorption experiments at room temperature were performed to examine both kinetic and equilibrium aspects of the process. The results revealed that the pseudo-second-order kinetic model provided the best fit to the experimental data, suggesting a chemisorption-controlled mechanism. Furthermore, equilibrium data were best described by the Langmuir isotherm model, indicating monolayer adsorption on a homogeneous surface. These findings highlight the potential of fruit and vegetable peels as effective bioadsorbent materials for the treatment of dye-contaminated wastewater

2025-01-01T00:00:00Z Khiat, Seif Eddine Houmer, Mohamed Ismail Bentama, Malak Kaabeche, Oualida Nour El Houda http://dspace.univ-constantine3.dz:8080/xmlui/handle/123456789/6258 2026-03-04T09:37:33Z 2025-01-01T00:00:00Z

Title: Élimination d’un Colorant synthetique par l’un des procédés oxydation avancée Authors: Khiat, Seif Eddine; Houmer, Mohamed Ismail; Bentama, Malak; Kaabeche, Oualida Nour El Houda Abstract: This study on the removal of a dye by advanced oxidation processes (AOPs) generally presents an in-depth analysis of techniques such as homogeneous-phase photo-oxidation. These processes rely on the generation of hydroxyl radicals (- OH), which are extremely powerful oxidants capable of degrading and fully mineralizing organic pollutants into non-toxic inorganic compounds such as CO₂ and water. The dissertation is often structured in three parts: a literature review, materials and methods, and the results and discussion section. These works demonstrate that AOPs are promising solutions for the treatment of industrial wastewater containing dyes, offering an efficient and environmentally friendly alternative to conventional methods, which are often ineffective.

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