A. H. Bahnasawy

Benha University · Department of Agricultural Engineering

The fluctuation of solar radiation throughout the day presents a significant obstacle to the widespread adoption of solar dryers for the dehydration of agricultural products, particularly those that are sensitive to high temperatures, such as basil leaf drying during the winter season. Consequently, this recent study sought to address the limitatio...

The main aim of this work is to study the main factors affecting the quality of the dried product and the energy requirements through optimizing these factors. To achieve that different drying systems (solar, hybrid solar and oven dryings), layers thickness (1, 2 and 3 cm) and drying temperatures (50, 60 and 70 °C) were used. The obtained results i...

Bio-diesel is used for engine as a replacement of diesel fuel which is characterized by lower emission, low pollution and renewable some of fuel. This study focus on how to enhance the production of bio-oil from Jatropha seeds by using microwave and ultrasonic as pre-treatments. To achieve that, the effects of extraction temperature (60, 80, 100 an...

The basil leaves were dried different sources of energy at different loading rates. Using hybrid solar drying compared to the conventional source of energy such as fossil and propane. Drying parameters were studied. Also, product quality was assessed under study treatments. The results indicated that the higher accumulated weight loss of basil leav...

The main aim of this work was to study the physical and chemical properties of Indian fig opuntia fruits. The results indicated that the length, width, and thickness of Indian fig opuntia fruits were 66.68, 46.09, and 43.39 mm, respectively. The geometric mean diameter and arithmetic mean diameter of the Indian fig opuntia fruits were 51.06 and 52....

The main aim of this study is to investigate the effect of modified atmospheric conditions and package type on the quality of potato tubers during storage. To achieve that, the effects of storage temperatures (6 and 23°C), types of packages (net and polyethylene) and number of holes perforated (2, 4 and 6 holes) on the weight loss, decay, sprouting...

The main aim of this work was to study the physical, mechanical and chemical properties of potato tubers (Spunta variety), to help in designing and developing of specific machine and their operations. The length, width and thickness of potato tubers values ranged from 60.03 to 89.93, 44.67 to 60.02 and 37.69 to 44.64 mm, respectively for all treatm...

Energy scarcity and conventional energy problems are the main reason of finding a renewable source of energy which is cheap and environmental friendly, therefore, biodiesel production is one of the most promising solutions of this problem. Also, Egyptian castor is one of the most important crops for oil production compared with other commonly used...

The main aim of this work was to study the effect of storage system (cold, ventilated and traditional) and package type on the quality of garlic during storage. The results indicated that, the total accumulated weight loss increases with increasing the storage period. Storage system had a great effect on the losses, where, the traditional storage s...

The shelf life and quality of chicken fillets meat were examined when the meat was packed in edible films reinforced with nano-particle materials. The films are Hydroxypropyl methylcellulose (HPMC) reinforced with silver nanoparticles (Ag-NPs) and Titanium oxide nanoparticles (TiO2-NPs). Antimicrobial activity, weight loss and total protein and lip...

The main aim of this research is to develop a mathematical model to predict the dissolved oxygen in recirculating aquaculture system. The oxygen consumption of the model through the fish respiration and nitrification and the oxygen addition of the model through oxygen generator and water pumping. The effect of different water temperatures (24, 26,...

The aim of this study is to investigate the effect of kiln temperature and type of wood on charcoal quality. The studied factors are two types of wood “casuarina and citrus”, moisture-contents of 6.8 and 7 % (db) respectively and pyrolysis temperatures of 573.15, 623.15, 673.15 and 723.15 K. The main results in this study can be summarized in the f...

The main aim of the present study is to develop, fabricate and evaluate a rotating grader for grading cereal corps. The effect of different orifice sizes (<7.5, 7.5 to 9.5 and 9.5 to 11.0 mm), inclination angles (0, 3, 5 and 7ᵒ) and rotational speeds of drum (25, 30, 35, 40, 45 and 50 rpm) were studied. The grader productivity, efficiency, specific...

The aim of this study is to investigate the effect of kiln temperature and type of wood on charcoal quality. The studied factors are two types of wood "casuarina and citrus", moisture-contents of 6.8 and 7 % (db) respectively and pyrolysis temperatures of 573.15, 623.15, 673.15 and 723.15 K. The main results in this study can be summarized in the f...

The main aim of this paper was to investigate the possibility of growing basil under three soilless systems (aeroponic, hydroponic and peatmoss slab systems). A model was developed to predict the nutrients consumption by basil plants. Shoot and root height, fresh and dry mass of whole plant, nutrients uptake, and oil content were studied during the...

Soilless cultivation systems that provide plant management in soilless conditions in which the supply of water and of minerals is carried out by nutrient solution, with or without a growing medium. The main aim of this paper was to investigate the possibility of growing basil under three soilless systems (aeroponic, hydroponic and peatmoss slab sys...

The aim of this study is to develop an environment friendly kiln to reduce emissions and the energy used in the operation of carbonization. The studied factors are two types of wood were used namely "casuarina and citrus" with different moisture-contents of 6.8 and13.1% at pyrolysis temperatures of 300, 350,400 and 450 O C. The main results in this...

Construction materials have a direct impact on the environment, on people, and their health. In addition, building insulation plays a decisive role in terms of energy consumption of buildings and regarding CO 2-emissions over their whole life cycle. In order to achieve a holistic concept for green building worldwide, it is necessary to develop ecol...

The main aim of this study is to investigate the possibility of drying chamomile plants under different conditions. The obtained results indicated that the accumulated weight loss of chamomile flowers was (86.27, 84.67, 82.70, 85.04 and 86.53)% for the sun-drying system, shadow-drying system, room-drying system, solar-drying system, and oven-dryi...

The main aim of this work was to study some physical and mechanical properties of the green beans pods and study the effect of storage temperature and packages type on the quality and shelf life of green beans. The results indicated that, the length, width and thickness of green bean pod value were 12.702, 0.874 and 0.808 cm, respectively. the mass...

The main aim of this work was to study the physical and mechanical properties of some varieties of the pepper fruits (Alonso Red, Lumos Yellow, Relampago Red, Dicaprio Yellow, Dicaprio Green, Relampago Orange, Conical Century White, Rush Red and Rush Green). The results indicated that, the length, width and thickness of pepper fruit value ranged fr...

The main aim of this work was to study the effect of storage temperatures (room temperature and refrigeration temperature) on the quality (weight loss and chemical composition change on pepper fruits) and shelf life of different varieties of pepper (Alonso Red, Lumos Yellow, Relampago Red, Dicaprio Yellow, Dicaprio Green, Relampago Orange, Conical...

Two field experiments were carried out during the two successive autumn seasons of 2016 and 2017 in private sector farm at Qaha village, Kalubia Governorate, Egypt, to investigate the effect of soil addition of humic acid, seaweed extract and effective microorganisms (EM) as well as the foliar spray with calcium, jasmonic acid and chitosan on veget...

A local corn sheller was evaluated at different rotational speeds of (40, 60, 80, 100 and 120 rpm) and moisture contents of (12, 16 and 20%). The performance was evaluated in terms of sheller productivity, shelling efficiency, unshelled grains, grain damage, loose grains at kernel outlet, specific energy consumption and operational cost. Sheller pr...

The main aim of the present work is to study and evaluate baking process energy requirements which considered the most consumable energy of bread baking stages. This was achieved by determining the moisture content, baking time, productivity and three types of energy (electrical, human and thermal) at four different belt speeds for two different ty...

An experiment was conducted to study the effect of fermentation conditions on the properties of bio fertilizer from cow manure. The results indicated that the lowest value of bulk density was 946.63 kg/m3 at temperature of 50°C, 300 rpm agitation speed and 5 liter/min, ventilation rate while the highest value (983.17 kg/m3) obtained at temperature...

An experiment was conducted to study the effect of fermentation conditions on the properties of bio fertilizer from cow manure. The results indicated that the lowest value of bulk density was 946.63 kg/m3 at temperature of 50°C, 300 rpm agitation speed and 5 liter/min, ventilation rate while the highest value (983.17 kg/m3) obtained at temperature...

This study aimed to develop a mathematical model to predict the soil temperature at various depths and times of the year under the Egyptian conditions. This model was validated against two sets of measured soil temperature profiles. The validation results showed acceptable agreement. Experimentation of this model showed that soil temperature after...

The main aim of the present work is to study and evaluate energy consumption in bread baking. This was achieved by determining the energy consumed in each stage of bread baking processing to assess the most consumable stage of bread baking process. Magr baladi, Mawi and French bread baking were evaluated processes. Thermal, electrical and human ene...

The main objective of this research is to study to which extent the content of nutrients in water farming is sufficient for growing tomato plants. The obtained results indicated that the nutrients consumption increased with increasing the flow rate. The root and shoot length increased with increasing effluent flow rate, when the effluent flow rate...

The main objective of this research is to study to which extent the content of nutrients in water farming is sufficient for growing tomato plants. The obtained results indicated that the nutrients consumption increased with increasing the flow rate. The root and shoot length increased with increasing effluent flow rate, when the effluent flow rate...

The determination of the energy consumption in manufacturing different type of feeds, rabbit, poultry and large animal feeds (pellets and crushed), was the main aim of this study. This was achieved by determining the energy consumed in each stage of processing to assess the most consumable stage in the different types of feed. The results indicated...

The main objective of this work was to study the effect of waxing (control, 25, 50, 75 and 100%) and storage temperature (room temperature, 15, 10 and 5°C) on cucumber fruits quality. The diameter change, length change, volume change, surface area change, weight loss, hardness change rate, Total Soluble Solids (TSS) were studied as the most importa...

The main objective of this research was to develop a mathematical model of heat and mass balance of the bread baking process to predict the temperature and water content of bread at different heating temperatures and times. The model was able to predict the bread temperature and water content at different oven temperatures (180, 190, 200, 210 and 2...

The experiments of this study were carried out to optimize some pelletization parameters and their effects on the quality of feed processing. The pelletizer was evaluated under different parameters including feeding rate and feed pellets. Pelletization process was evaluated by studying the specific energy consumption and quality of feed pellets at...

The experiments of this study were carried out to optimize some grinding parameters and their effects on the quality of corn for feed processing. The hammer mill was evaluated under different parameters including grain moisture content and sieve hole diameter. Grinding process was evaluated by studying the performance, energy consumption, grinding...

The physical parameter results showed that the garlic geometric and arithmetic mean diame-ters ranged from 2.53 to 4.93, and 2.53 to 5.02 cm, respectively according to the bulb size cate-gories. The cloves' length, width and thickness were 1.92 to 2.91, 0.78 to 1.32, and 0.69 to 0.99 cm, respectively. The surface and cross-sectional of areas ranged...

Size grading is an important operation in food processing for the onion export industry in particular. The aim of this work was to develop an appropriate machine for sizing onions, reduce losses and reduce grading costs. Maximum sizing efficiency obtained was 94.9±2.82 % at zero longitudinal angle and at a belt speed of (0.23 m/s), while it was 94....

A computer-based decision support system called a Production Economical Reporting and Control System (PERCS) has been developed to help people work in food processing industries: decisions making, choosing between alternatives, solving problems and planning for the future. The system was divided into five parts: (a) the data management, (b) the mod...

Due to lack of information about the physical and mechanical properties of feed pellets which are very important to understand the behavior of the product during the processing operations such as transporting, packaging and storage processes and also, it is necessary in processing operations. The main objective of this work was to study the physica...

The objective of this work was to investigate the efficiency of both double drain and screen filter on solids removal in recirculating aquaculture system to improve the water quality and increase the fish growth rate. A model was developed to determine the solids removal in recirculating aquaculture system. By fitting the predictions of the model t...

A simulation model of hybrid solar drying as alternative sustainable drying system for herbal and medicinal plants was developed. Heat absorbed from the solar radiation, heat gained by the collector and supplemented by the burner, heat gained or lost by the product, heat gained or lost through the drying bin wall, heat gained or lost with the dryin...

ABSTRACT A n onion peeling machine was designed, manufactured, developed and evaluated to suit the small and medium processing units. The onion peeling machine consists of seven parts, main frame, peeling drum, inlet and outlet openings, collection basin, water and air supplying systems, and power transmission. The machine was evaluated using diffe...

The objective of this work was to investigate the efficiency of both double drain and screen filter on solids removal in recirculating aquaculture system to improve the water quality and increase the fish growth rate. A model was developed to determine the solids removal in recirculating aquaculture system. By fitting the predictions of the model t...

This work aimed to study the absorption and desorption behavior of some clay–sandy plasters reinforced with natural fibers that could be used for straw bale buildings. The plaster materials consisted of soil, sand and chopped straw. Straw is used as a reinforcement fiber for plaster. Three types of fibers were used, namely wheat straw, barley straw...

Flux decline and recovery of UF process used in concentrating milk at different operational pressures were studied. Filter medium resistance during filtration and cleaning was estimated from the experimental data. Energy consumption during filtration and cleaning processes were estimated. Regarding the flux behavior, retentate and permeate fluxes d...

Flux decline and recovery of UF process used in concentrating milk at different operational pressures were studied. Filter medium resistance during filtration and cleaning was estimated from the experimental data. Energy consumption during filtration and cleaning processes were estimated. Regarding the flux behavior, retentate and permeate fluxes d...

An experimental study into the compressive strength of fibre reinforced earth plasters is presented. The plaster material is composed of cohesive soil and sand. Three types of natural fibers are used as reinforcement, namely, wheat straw, barley straw and wood shavings. Ten different types of plasters with different compositions of earth materials...

A laboratory scale-spray dryer performance was evaluated experimentally. Powder yield, drying rate, feeding rate, drying time, evaporation rate and energy consumption were investigated under different inlet air temperatures and atomization speeds for drying some milk-juice blends and whole milk. Theoretical approach of the dryer was developed, and...

FLUX DECLINE AND RECOVERY OF ULTRAFILTRATION (UF) PROCESS USED IN MILK CONCENTRATION BY * Agricultural Engineering Department. Mail: bahnasawyadel@hotmail.com ** Food Science Department, Moshtohor, Faculty ofAgriculture, Benha University, Egypt. B.O.Box. 13736 (Accepted, 19/10/2009) Flux decline and recovery of UF process used in milk concentratio...

Ultrafiltration (UF) is an important process in the food industry, particularly for dairy applications such as concentration of milk. The major problem in membrane separation process is decline in flux over time of operation. This flux decline is attributed to the fouling of membrane. Membrane fouling is affected by three major factors, namely, the...

Size grading is an important operation in food processing for the onion export industry in particular. The aim of this work was to develop an appropriate machine for sizing onions, reduce losses and reduce grading costs. Maximum sizing efficiency obtained was 94.9±2.82 % at zero longitudinal angle and at a belt speed of (0.23 m/s), while it was 94....

The effect of spray drier functional parameters (inlet air temperature namely, 190, 220 and 250C and atomization speeds, namely, 18000, 22000 and 26000 rpm on the physical, chemical properties of some milk-juice blends (milk-banana, milk-strawberry and milk-pear) and whole milk only (control) were investigated. Structural properties were also stud...

This work aimed to study the effect of storage conditions (cold, room temperature and traditional storage systems), packaging types (plastic, carton and clothes), and bulb size (small, medium and large sizes) on the quality of garlic during storage. Moisture loss, total losses, sprouting and empty bulb percentages were determined during the storage...

A mathematical model of direct sun and solar drying of some fermented dairy products (Kishk) was developed. Solar radiation, heat convection, heat gained or lost from the dryer bin wall and the latent heat of moisture evaporation were the main components of the equations describing the drying system. The model was able to predict the drying tempera...

Due to the lack of information about the physical and mechanical properties of onion in Egypt which are very importance to understand the behavior of the product during the post harvesting operations such as harvesting, transporting, sorting, grading, packaging and storage processes and also, it is necessary in processing operations such as cooling...

Six types of dairy products (Domiati, UF-Feta like cheese, Cheddar, Ras, Karish cheeses and Yoghurt) were made and the energy accounting was carried out to determine the energy consumption, energy losses and water used while manufacturing of these products on a small-scale. The total energy required for manufacturing Domiati cheese, UF-Feta like ch...

Abstract In Egypt, there are about 0.63 million hectares (1.5 million Feddans) cultivated area with rice each year. This results in nearly 4 million tonnes of rice straw. In this study, two methods of rice straw picking up were evaluated under field conditions using a rectangular baler. These include the mechanical picking up at three forward speed...

Abstract In Egypt, there are about 0.63 million hectares (1.5 million Feddans) cultivated area with rice each year. This results in nearly 4 million tonnes of rice straw. In this study, two methods of rice straw picking up were evaluated under field conditions using a rectangular baler. These include the mechanical picking up at three forward speed...