Amina Benhamou | Algeirs university (original) (raw)

Papers by Amina Benhamou

In this article it was investigated the effect of chemical modification of the surface of olive p... more In this article it was investigated the effect of chemical modification of the surface of olive pomace fiber and local date stones on their physical and thermal properties. The use of soda treatment, the dimethoxydimethylsilane, and alkaline pretreatment followed by treatment with dimethoxydimethylsilane fibers leads to an improvement of the thermal stability of the fibers and a reduced absorption of water, which allows us to recommend the use of its flour as fillers or reinforcements in the development of Wood Plastic Composite

International Journal of Medicinal and Aromatic Plants, 2013

Objective of this work is ethnobotanical, phytochemical and healing effect of Carthamus coeruleus... more Objective of this work is ethnobotanical, phytochemical and healing effect of Carthamus coeruleus (Asteraceae) rhizomes a medicinal plant in the region of Baghlia (Algeria),.The result of et hnobotanical study shows that from 74, 98% of respondents were able to identify 66.66% women aged above 44 years who use this plant frequently for healing and therapy of different degrees burns. We conducted a characterization study of rhizomes through a phyto- chemical screening reveals the presence of alkaloids, leucoanthocyanins, flavonoids, coumarins, saponins and absence of anthocyanins, tannins, and iridoids. To study the healing effect, we chose to formulate healing cream -based Total rhi- zomes of Cartamus coeruleus with participation of qualified person in this area. This cream was applied to wistar rats in which wounds and burns were caused by incision and burn of 2 nd degree, respectively. Healing and cell regeneration of the burnt skin and the wound closure caused, had resulted in t...

Renewable Energy, 2019

Abstract Algeria industry fruit processing generates a huge amount of waste which causes a seriou... more Abstract Algeria industry fruit processing generates a huge amount of waste which causes a serious environmental problem. Thereby, the use of solar drying as a clean energy process seems to be a promising solution. This will enhance the value of fruit waste by reusing it in a dry form, and will also contribute to the protection of the environment. For this purpose, an innovative greenhouse solar dryer has been designed at the Solar Equipment Development Unit in Bou Ismail. An experimental study of solar drying kinetics of industrial tomato pomace was conducted to test the performance of the new solar dryer as a waste processing dryer. The drying temperature of the tomato waste, using this type of dryer, varies between 40 and 58 °C. The duration of the drying operation for a final product is only 5 h. Five new universal and dimensionless models and five different drying models chosen from the literature were evaluated in order to select the model that better fits the experimental data generated during the drying process. Among the different models tested, it emerged that the new model2 was the most suitable to describe the drying process of tomato waste. Also, the diffusion coefficient and the activate energy were studied and determined. The effective diffusivity varies between 3.2E-9 and 4.7E-10 m2/s with activation energy is 75.6 kJ/mol.

International Review of Automatic Control (IREACO), 2017

In rural areas, the high cost of grid extension requires institutions to consider other alternati... more In rural areas, the high cost of grid extension requires institutions to consider other alternatives, such use of generators (GE) diesel is often considered as an economic and reliable solution, but generates environment pollution and it is convenient for the user. High Costs of operation; Energy dependence; fuel supply problem (removal of fuel suppliers); complicated and expensive maintenance; Low lifetime (about 5 years and sometimes less); Impossibility of 24 hours electricity production ( or need for several GE; Sound Births and waste oil management issues). Furthermore, the continuous decline in the prices of generators based on renewable energy and the increasing reliability of these systems lead to a greater use of renewable energy sources for power generation in remote areas. A property which limits the use of renewable energy is related to the variability of resources. Fluctuations in load according to annual or daily periods are not necessarily correlated to the resources. In remote areas, the preferred option is the coupling between multiple sources, such as wind turbines and solar panels, this coupling is called hybrid power system. Algeria’s geographic location presents several advantages for the development and use of renewable energy, namely, solar energy and wind energy. In addition, Algeria has huge deposits of natural gas, 98% electricity comes from gas. Therefore, currently, the production of electricity from renewable energies primarily depends on their competitiveness with economic gas.The objective of this work is to study the technological feasibility and economic viability of the hybrid system (PV/fuel)electrification project in a school located in Tarat (Algeria) and to reduce traditional power emissions by using renewable energy. The HOMER model is used in this study to size the proposed system and determine the optimum configuration.

-Les teneurs en eau d'équilibre de désorption et d'adsorption des feuilles de marjolaine (Origanu... more -Les teneurs en eau d'équilibre de désorption et d'adsorption des feuilles de marjolaine (Origanum majorana) ont été déterminées à 30, 40, et 50 °C par la méthode gravimétrique statique. L'équilibre a été obtenu après 12 jours pour la désorption et 9 jours pour l'adsorption. L'effet d'hystérésis thermique est observé dans la gamme des températures testées. Pour la modélisation des isothermes de sorption, et pour la prédiction du comportement hygroscopique lors du stockage ou du séchage, quatre modèles mathématiques ont été utilisés. Le modèle de Peleg à quatre paramètres optimise le lissage des points expérimentaux dans un domaine des activités de l'eau assez important. Des changements relativement importants se font sentir dans les propriétés thermodynamiques de la marjolaine en termes d'enthalpie différentielle et d'entropie Toutefois, ces derniers se compensent et il est possible qu'ils soient principalement le résultat de différences dans la structure de l'eau autour de la périphérie de la plante et du site qui se combine, tant avant qu'après la sorption. Abstract-The moisture contents of balance of desorption and of adsorption of the leaves of marjoram (Oregano marjoram), were determined to 30, 40, and 50 °C by the static gravimetric method. The balance was obtained after 12 days for desorption and 9 days for the adsorption. The effect of thermal hysteresis is observed in the range of the tested temperatures. For the modeling of the isotherms of sorption, and for the prediction of the hygroscopic behavior, during the storage or during the drying, four mathematical models were used. The model of Peleg in four parameters optimizes the smoothing of the experimental points in a rather important domain of the activities of the water. Relatively important changes are felt in the thermodynamics properties of the marjoram in terms of differential enthalpy and entropy However, these last ones counterbalance and it is possible that they are mainly the result of differences in the structure of the water around the suburb of the plant and the site which harmonizes, so much before than after the sorption.

The objective of this work is to contribute to the enhancement of sludge of wastewater treatment ... more The objective of this work is to contribute to the enhancement of sludge of wastewater treatment plants in Algeria. A kinetic comparison was made to the direct and indirect solar driers operated with natural convection. The indirect dryer gives temperatures and high efficiency with the direct drier. Drying curves show that the higher the temperature, the higher the short drying time and the drying speed is fast. Solar dryers have reduced the time needed, a water reduction of 71c/o which increases the dryness of the mud from 14.47c/o to 85.53c/o. According to the results obtained, the use of sludge could be very interesting from an agricultural and energy point of view, because it contains more than 58% of MO and can reach 63% in the three summer months (June, July and August). Keywords— Organic matter, Physic-chemical characterization, Renewable energy, Sludge, Solar drying, Thermal treatment. Nomenclature DM: Dry matter (%) DSD: Direct solar drier ISD: Indirect solar dryer OM: Orga...

This work represents only a beginning in the experimental study of the management of sludge from ... more This work represents only a beginning in the experimental study of the management of sludge from a biological method that aims to produce energy and reduce the risks associated with land application of sewage sludge and mineral fertilizers. Several pathways exist for the disposal of sludge, but the choice must depend on the cost of installation, the origin of sludge, the added value of the resulting product and the potential impact of the industry accepted on the environment. The landfill (also called storage) is a low-rewarding and legally prohibited in many countries. However, application of composts obtained should not be done without confirming their hygienisation, their stabilization and maturity. In addition, the sludge compost should be free of phytotoxicity, with concentrations of heavy metals (Cu, Zn, Cd, Hg, Cr ...) and organic micro levels below international standards. Our work was performed at the National Sanitation Office of Boumerdes, the objective is, to assess the ...

International Journal of Applied Power Engineering (IJAPE)

Rural areas suffer from high costs of grid extensions obliging institutions to provide for other ... more Rural areas suffer from high costs of grid extensions obliging institutions to provide for other remedies for consumers, like using generators (GE) diesel often considered as economic and reliable solutions, but at the detriment of some order environment pollution and users convenience. Furthermore, the continuous decline in GEs prices based on a renewable energy (RE) and the increasing reliability of these systems have lead to a greater use of renewable energy sources for power generation in remote areas. A property which limits the use of renewable energy is related to the variability of resources. Fluctuations in load according to annual or daily periods are not necessarily correlated to the resources. In remote areas, the preferred option is the coupling between multiple sources, such as wind turbines and solar panels, this coupling is called hybrid power system. Algeria’s geographic location presents several advantages for the development and use of renewable energy, namely, so...

Renewable Energy, 2020

Abstract Potatoes are a very high demand product in the consumer market and are widely available ... more Abstract Potatoes are a very high demand product in the consumer market and are widely available everywhere in Algeria. With the extensive levels of solar energy across the country, solar drying becomes a natural avenue for the production of solar dried potatoes as a new prospective commercial product. This paper is a study of the drying process of potatoes using an indirect and a mixed solar dryer with forced convection and a comparison of their respective performances. Experimental results indicated that the mixed solar dryer had the slowest drying rate compared to the indirect solar dryer with drying times of 4 h 45min and 3 h 40min respectively, even though the temperature at the tray level in the mixed solar dryer was higher than that of the indirect solar dryer. Fourier series and Laplace transforms were used to solve the diffusivity equation. Seven theoretical models were investigated and their relative accuracy validated against experimental data. Two new dimensionless models were found to best fit the drying curve of potato slices using the two dryers. The proposed models were found to be more accurate for charactering the drying process of Sultana grapes, chili peppers, bananas, mangoes and cassava, according to models reported in the literature under different operating conditions using various solar dryer designs.

The objective of this work is to contribute to the enhancement of sludge of wastewater treatment ... more The objective of this work is to contribute to the enhancement of sludge of wastewater treatment plants and solar energy in Algeria. A kinetic comparison was made to the direct and indirect solar dryers operated with natural convection. Two models have been developed to simulate drying. Under natural conditions and at ambient temperatures below 32°C, the indirect dryer gives high temperatures and efficiency compared to the direct dryer. Drying curves show that the higher the temperature is, the shorter drying time is and the faster drying speed is. From the drying curves, only the decreasing speed phase or slowdown (phase 2) is observed in the two types of drying, which is similar to results obtained in the literature with plant products. Solar dryers have reduced the time needed, a moisture reduction of 71% which increases the dryness of the mud from 14.47% to 85.53%. Thirteen mathematical models existing in the literature were tested and compared with the proposed models. The proposed models and the modified Henderson and Pabis model showed the best smoothing qualities of all indirect and direct dryer drying kinetics, with an advantage for the proposed models as they are dimensionless (independent models of units of measurement), they contain fewer parameters and verify the boundary conditions.

International Journal of Medicinal and Aromatic Plants, 2013

Renewable Energy, 2019

International Review of Automatic Control (IREACO), 2017

International Journal of Applied Power Engineering (IJAPE)

Renewable Energy, 2020

The objective of this work is to contribute to the enhancement of sludge of wastewater treatment ... more The objective of this work is to contribute to the enhancement of sludge of wastewater treatment plants and solar energy in Algeria. A kinetic comparison was made to the direct and indirect solar dryers operated with natural convection. Two models have been developed to simulate drying. Under natural conditions and at ambient temperatures below 32°C, the indirect dryer gives high temperatures and efficiency compared to the direct dryer. Drying curves show that the higher the temperature is, the shorter drying time is and the faster drying speed is. From the drying curves, only the decreasing speed phase or slowdown (phase 2) is observed in the two types of drying, which is similar to results obtained in the literature with plant products. Solar dryers have reduced the time needed, a moisture reduction of 71% which increases the dryness of the mud from 14.47% to 85.53%. Thirteen mathematical models existing in the literature were tested and compared with the proposed models. The proposed models and the modified Henderson and Pabis model showed the best smoothing qualities of all indirect and direct dryer drying kinetics, with an advantage for the proposed models as they are dimensionless (independent models of units of measurement), they contain fewer parameters and verify the boundary conditions.