Electrochemical treatment of Raw Waterfor Thermal Power Plants requirments

In this research electrochemical treatment was used to treat Al-Sin water that feed Banias thermal station boilers for generate electricity , this recycled pure water minimize corrosion and wear of turbine, the current of (2A) and (12V) was applied by Transformer on metal electrodes of aluminum. The electrochemical treatment efficiency was studied. Results revealed that the turbidity decreased for about (98%), and that total dissolved solids (TDS) and conductivity were reduced by about (61%) and (70.8%) respectively after one hour of treatment process.

The method of determining the critical case expressing the possibility and validity of the continuation of the Internal combustion engines operating under normal conditions

The research focuses on finding planning methods based on measuring and monitoring the basic indicators of internal combustion engines (Diesel engines) in order to determine the critical case of the engines, which determines the expected time for the engine or for some of its basic parts to be sent for comprehensive maintenance. The wear ratio of one of the basic components of the engine was also determined, we also chose the diameter of the cylinder and the corrosion that happens to it in order to determine the engine's lifetime and determine the moment when the engine should be sent for comprehensive maintenance. By observing a large number of engines put in repair in the industrial area in Lattakia, which are 30 engines of different types of diesel and gasoline, and with different capacities, it was noticed that about 15% of these engines were not exploited and invested the entire work period designed for them. Also it was noticed that 20% of them have stopped working because of the severe corrosion of parts, components and mechanics of these engines, which led to their damage and their inability to do their work on a regular basis. This has contributed to increased consumption of fuel and Lubricating materials, which causes damage to the national economy. The proposed planning method for determining the critical case of the engine when comparing the schematic results with the practical results of the engines has proved its efficiency and accuracy with an error rate of no more than 6% This allows it to be applied and adopted as an effective way to determine the actual lifetime of the engine and compare it with the life time of investing the engine mentioned in the manufacturer's catalogs when operating the engine under normal conditions.

Database management in the GIS system for the selection of (OMWW) water treatment sites resulting from olive presses

The aim of this research is to optimize the selection of the sites of Evaporation Tanks/Ponds, of Olive Mill Waste Water (OMWW). We have to achieve strict environmental conditions, which in turn relate to a wide range of factors including topography, namely: elevations, rivers, silos, lakes and faults, in addition of those related to man-made geographical elements: cities, villages, roads, dams, wells and contemporary. To complete the study and obtain reliable results, we adopt GIS, which requires defining all of the above factors in the form of a graphical and descriptive environment. The choice of potential sites is through verification of the required conditions using GIS. This requires the availability of data specific to each condition, verification of other conditions through field visits and measurements in the absence of necessary data, and it is necessary to use the available space images significantly through GOOGLE EARTH for initial verification of selected sites. Appropriate technology is used according to the state of the OMWW, and according to the economic potential of the application of this technology. The main objective of these treatments is to reduce their load of organic matter. The remaining water will be used to irrigate the agricultural land. Production of manure and feed of cattle.

Biological Treatment of Rice Straw and Glucose Production Using Bacillus sp.

The study was conducted in 2016. The samples of rice Oryza sativa L. straw were collected from Dewania governorate/Iraq, and were brought to laboratory of Directorate of Environmental and Water in Ministry of Science and Technology. The samples were cleaned and milled, then stored in sterile containers. Local cellulolytic bacterial isolate was cultivated and isolated on mineral and cellulose medium, at 37 ºC for (24± 2) hours, the bacterial isolate was diagnosed as Bacillus sp. depending on phenotypes of bacterial colonies on solid medium, microscopic characters and some biochemical tests. Milled rice straw was chemically treated with 1% of sodium hydroxide, then biological treatment by bacterial isolate Bacillus sp cultivate in mineral medium with alkali treated rice straw as carbone source and compared with cellulose standard medium. The bacterial growth was measured at 600 nm, which reached 0.974 in rice straw medium, while in cellulose medium reached 0.853. For glucose concentration, the value reached 250 μg/ml in rice straw medium, while in cellulose medium it was 210 μg/ml. The results concluded the possibility of getting rid of rice husks, which is an environmental contaminant, and to use it in the production of glucose.

Evaluation of the Upper Airway Changes in Class II Patients Resulting From Functional Treatment Using Cone Beam Computed Tomography - An In Vivo Study

Objective: This research aimed to evaluate the three-dimensional effects of a Twin Block (TB) appliance on the pharyngeal airway passage (PAP) in a sample of Class II patients with mandibular retrusion using cone-beam computed tomography (CBCT).

In Vitro Comparative Study Between Gutta-Percha And Resilon to evaluate the Apical Microlekage

One aim of the root canal treatment is providing compact three dimensional seal for the canal system to prevent germs enter and its products across both the apical and coronal ways. Gutta-Percha is the most use material to fill the radicalism canals. It has limited importance in spite of many specifications as lack of the link to the ridge canal.

A Comparative Study Of The Shear Bond Strength Of Acrylic Teeth To Acrylic Resin Bases Using Conventional and Blasting Methods

Debonding of acrylic denture teeth from denture base is the most common failure in removable dentures . The purpose of this study was to evaluate shear bond strength between acrylic denture teeth and heat cure denture base resin with different surface treatment and modifications on the ridge lap area By Using Conventional Method and Blasting Method.

An in vivo study to evaluate the role of tooth's type and the position of Jaw in success or failure root canal treatment

The Rootcanal treatment is considered as the most accurate one followed in (( dentistry )), which need a right diagnosis and exact treatment steps to be performed completely for an excellent prognosis treatments ended by along time –perfect success.

Using Fixed Bed Columns packed with natural zeolite to Removal heavy metals from Industrial wastewater of Banias Refinary

Fixed bed adsorption columns packed with natural zeolite were used to study the kinetics of heavy metals removal from the single component solutions of Vanadium, Nikle, Zinc, and Lead. The system parameters studied include solution flow rate and bed height. The effect of competing cations was also studied to establish the effectiveness of natural zeolite in treating Industrial wastewater under continuous conditions using fixed bed columns. The metal loaded natural zeolite was regenerated using NaCl . The results from column studies showed that the Slower flow rates gave better removal efficiencies compared to faster ones, Longer bed heights also resulted in greater adsorption efficiencies. The bed depth service time (BDST) model was successfully used to simulate experimental results at 30 % breakthrough. This model provides the necessary parameters needed for fixed bed column design, the factor R2 ranged between 0.91 – 0.95. Natural zeolite was exposed to 3 cycles of adsorption and desorption. The efficiency of the column in removing heavy metals was high, The results indicate that natural zeolite can be regenerated and re-used in removing heavy metals from solution.

Modeling of the fatigue crack initiation period on the helical gears

A computational model of the fatigue crack initiation period on the helical gears ,with consideration of the heat treatment by carburization and friction effects, is presented. In order to calculate the number of stress cycles required for the appearance of the initial cracks, and study the influence of dynamic behavior. For this end, a dynamic model of gear with two freedom degrees in torsion developed in Matlab and fatigue criteria are used. The computational results are compared with those obtained using strain- life method. The obtained results show that appearance of initial fatigue crack depends strongly on the friction coefficient between the surfaces, heat treatment, and on the dynamic load.