Elsayed Khater

Benha University · Department of Agricultural Engineering

This study aimed to carry out a techno-economical study on the integrated aquaponic system for tilapia fish and lettuce plants. Fish and plant production was evaluated technically by determining the yield and economically by estimating the total costs, revenue, payback period, benefit/cost ratio, and internal return rates. The results indicated tha...

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...

The main aim of this work is to study the effect of different nutrient supply systems and their effect on the performance of the Nile Tilapia (Oreochromis niloticus) and Lettuce (Lactuca sativa var. crispa) plant integration system. To achieve that, five treatments having different culture systems (T1: Aquaculture (control), T2: Hydroponics (standa...

The main aim of this study is to determine the physical and chemical properties of biochar synthesized from different materials (straw rice, sawdust, sugar cane, and tree leaves) at different pyrolysis temperatures (400, 600, and 800 °C). The physical and chemical properties such as moisture content, water holding capacity, bulk density, and porosi...

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...

This work amid to study the potential positive effects of magnetic water under different hydroponic systems to obtain maximum productivity and quality of water, fresh yield quantity and quality of Chicory. The effect of different nutrients sources (magnetized and non-magnetized solution), two systems of hydroponics (A shape and gutter systems) and...

Aquaponics is the combined culture of fish and plants in recirculating aquaculture systems, considered to be an innovative, eco-friendly and sustainable technology. The effect of the hydraulic loading rate (HLR) on the performance of fish and plants in the aquapoinc system was the main aim of this study. Four hydraulic loading rates were applied, 1...

Effect of pad thickness and air velocity on the performance of evaporative cooling system

This work amid to study the potential positive effects of magnetic water under different hydroponic systems to obtain max productivity and quality of water, fresh yield quantity and quality of Chicory. The effect of different nutrients sources (magnetized and non-magnetized solution), two systems of hydroponics (A shape and gutter systems) and thre...

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 study is to improve productivity, physical and chemical properties of the fruits and fruit quality of Eureka Lemon trees while lowering production costs by investigating the use of different NPK alternative sources (slow release, and bio) to reduce the use of chemical NPK fertilizers. Ten treatments of NPK fertilizers were appl...

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...

Reducing reliance on fossil fuels with clean and sustainable alternatives is essential for mitigating climate change and global warming-related environmental concerns. Previous researchers have studied the performance of choppers and crushers as separate units powered by diesel or gasoline engines. Nowadays, an increasing interest in producing Eco-...

The bio-composite films based on Hydroxypropyl methylcellulose (HPMC) reinforced with silver nanoparticles (AgNPs) and Titanium oxide nanoparticles (TiO2-NPs) were developed. Some physical and mechanical properties: Tensile strength (TS), elongation (E), Young’s elastic modulus (EM), water vapor permeability (WVP) and transparency were determined....

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...

Fish feed extruders performance is deeply affected by the operational conditions. Unproper operational condition cause poor quality of feed and affect the productively of such machine, therefore, the main aim of the present work is to study the effect of some engineering parameters (screw speed, feeding rate and die hole diameter) on the perfo...

The main aim of this study is to use the Geographic Information Systems (GIS) techniques to determine the optimum site to collect the residues in order to reduce cost and increase the benefits. To achieve these three scenarios were studied to reach the best collection sites for recycling rice straw in Sinbilawin center. The results indicate that th...

The main aim of this research is to study the effect of flow rate, diameter and number of nozzles on the rotational velocity, impulse force and average velocity of water in circular fish tanks. The results indicated that, the rotational velocity increases with increasing flow rates from 5 to 75 m³ h⁻¹ by using 10 and 15 mm nozzles diameter with noz...

This study explored the impacts of modified atmosphere packaging (MAP) treatment on the proteolytic development and volatile compounds of Domiati cheese during storage. Domiati cheese samples were kept for 75 days at refrigerator temperature, under aerobic packaging (C1) or vacuum (C2). In parallel, other Domiati cheese samples were kept under MAP,...

The main aim of this study is to determine the physical and chemical properties of biochar made from different raw materials (straw rice, sawdust, sugar cane, and tree leaves) at different pyrolysis temperatures (400, 600, and 800°C). Moisture content, water holding capacity, bulk density, and porosity were the measured physical properties; pH, Ele...

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 main aim of this work is to optimize the operational parameters of using evaporative cooling system such as thickness of pads and air velocity. To achieve that, study the effect of different pad thicknesses (10, 15 and 20 cm) and different air velocities (1.5, 3.0, 4.5 and 6.0 m s-1) on air temperature, relative humidity, temperature reduction,...

The main aim of this work is to optimize the operation parameters of using evaporative cooling system such as height of pads and air velocity. To achieve that study the effect of different pad height (1.0 and 2.0 m) and different air velocities (1.5, 3.0, 4.5 and 6.0 m s-1) on air temperature, relative humidity, temperature reduction, cooling effic...

Aquaponics is the combined culture of fish and plants in recirculating aquaculture systems, considered to be an innovative, eco-friendly and sustainable technology. So, the main aim of this work is to study the effect of flow rate and culture system on nutrients consumption rate and lettuce productivity in hydroponic and aquaponic systems. To achie...

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 work is to investigate to which extent the content of nutrients in water discharged from fish farms is sufficient for growing lettuce plants, in order to reduce the using of chemical fertilizers, save water, improve the plant and fish. To achieve that study the effect of different flow rate (1.0, 1.5 and 2.0 L h-1) and culture...

Aquaponics is the combined culture of fish and plants in recirculating aquaculture systems, considered to be an innovative, eco-friendly and sustainable technology. So, the main aim of this work is to investigate to which extent the content of nutrients in water discharged from fish farms is sufficient for growing lettuce plants, in order to reduce...

Ice cream is a popular dessert product across the world. Structure, body, taste, and odor properties are created by adding non-milk ingredients and milk ingredients. The main aim of the study is to decrease the caloric value of ice cream by using sugar and fat replacements. Ice cream treatments were investigated based on microstructural, chemical,...

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 main aim of this research was to study the effect of storage conditions (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, Conica...

An automatic feeder for fish feeding was manufactured and evaluated successively. Feed pellet size, air flow rate and feeder screw speed were the most important factors affecting the performance and efficiency of the automatic feeder. It was tested at 3 sizes of pellets (1, 2 and 3 mm), 3 air flow rates (10, 15 and 20 m ³ min ⁻¹ ) and 5 screw speed...

The main aim of the present study is to develop, to fabricate and to evaluate a cutting machine for turnip fingers to be used in small and medium production like stainless steel and mild steel were used in fabrication. The machine productivity increased with increased turnip size, slice thickness and cutting speed. The uniformity index increases wi...

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 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...

The main aim of this work utilize the hybrid solar dryers. Different drying temperatures and air recirculation rates tested their effects on the weight losses, moisture content and energy consumption. To achieve that different drying temperatures (50, 55 and 65 °C) and air recirculation rates (70, 80 and 90 %) were used. A mathematical model develo...

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 main aim is to find out the influence of using colored plastic mulches (blue, white, green, red, black and white on black) compared with the mulch-free treatment on root zone temperature, growth and productivity of broccoli. The results indicated that the mean root zone temperatures recorded the highest in dark-colored mulches (blue, green, red...

The main aim of this work study the drying parameters and basil quality under different drying systems. Also, study the effect of different extraction methods on essential oil yield and composition of sweet basil to determine the best drying methods of conserving the major essential oil compounds of basil. The work were divided into two parts: The...

The need for heating and cooling in traditional housing is becoming increasingly disadvantageous regarding high energy costs. But what is more concerning is the impact on our environment. The main goal of this paper is studying the prospects of using renewable energy for heating and cooling houses through an integrated bio-solar system in order to...

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-drying...

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 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 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...

The main aim of this work is a techno-financial evaluation for some sex reversal methods of Nile tilapia. To achieve that study the effect of water temperatures (25, 30 and 35 °C), hormone levels (without (0) and 60 mg 17 ᾳ-MT/ kg feed) and periods of time (1, 2, 3 and 4 weeks) on the male ratio, mortality rate, weight gain of Nile tilapia frie...

The main aim of this study is to investigate the possibility of drying the basil plants under five different drying systems. The obtained results indicated that the accumulated weight losses of basil plants were 77.43, 74.00, 70.48, 74.92 and 77.99 %, for sun-drying system, shadow-drying system, room-drying system, solar-drying system and oven-dryi...

The main aim of this work is to optimize the environmental condition for best grafting by control the temperature and light of grafting conditions. To achieve that was study the effect of ambient temperatures (20, 23, 26 and 29°C), light intensity (0, 2500 and 5400 Lux) and type of tunnel (truss and flat) on stem diameter, shoot length, leaf are...

The main aim of this work is to study the effect of water temperature on masculinization, growth and survival of Nile tilapia. To achieve that two experiments were carried out to study the effect of water temperatures (25°C, 30°C and 35°C) and periods of time (1, 2, 3 and 4 weeks) on the male ratio, mortality rate and weight of Nile tilapia fry in...

Soilless culture is a technique for crop production without soil. Crops are grown in the nutrient solution or on a proper medium, therefore, soilless culture involves no work such tools or machines. But it needs additional costs for growing systems and chemical fertilizers. It offers earlier growth and higher yield. The main aim of this research is...

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...