yasser vasseghian
Chemical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran
[ 1 ] - Modeling and optimization of oil refinery wastewater chemical oxygen demand removal in dissolved air flotation system by response surface methodology
In this present study the dissolved air flotation (DAF) system was investigated for the treatment of Kermanshah Oil Refinery wastewater. The effect of three parameters on flotation efficiency including of flow rate (outflow from the flotation tank), saturation pressure and coagulant dosage on chemical oxygen demand (COD) removal was examined experimentally. All the experiments were done under a...
[ 2 ] - Modeling and Experimental Prediction of Wastewater Treatment Efficiency in Oil Refineries Using Activated Sludge Process
In this study, activated sludge process for wastewater treatment in a refinery was investigated. For such purpose, a laboratory scale rig was built. The effect of several parameters such as temperature, residence time, effect of Leca (filling-in percentage of the reactor by Leca) and UV radiation on COD removal efficiency were experimentally examined. Maximum COD removal efficiency was obtained...
[ 3 ] - Ash and sulphur removal from bitumen using column flotation technique: Experimental and response surface methodology modeling
This study investigates removing ash and pyrite sulphur from bitumen by column flotation process. Central composite design (CCD) of response surface methodology (RSM) was applied for modeling and optimization of the percentage of ash and pyrite sulphur removal from bitumen. The effects of five parameters namely the amounts of collector and frother agents, particle size, wash water rate and feed...
[ 4 ] - Simultaneous Ash and Sulphur Removal from Bitumen Using Column Flotation Technique: Experiments, RSM Modeling and Optimization
An efficient method was employed for the ash and pyrite sulphur removal from bitumen using column flotation process. The bitumen samples containing 9.6% sulphur (6.81% in the pyrite sulphur form) and 26.4% ash were successfully showed up to 75.20% of pyrite sulphur (e.g.; 51.66% of total sulphur) and 70.81% of ash removal. The Box-Behnken Design (BBD) was employed to design the experiments, to ...
[ 5 ] - تخمین تابش کلی خورشید در استان کرمانشاه با استفاده از شبکه‌های عصبی مصنوعی
هدف مطالعه حاضر توسعه یک مدل شبکه عصبی مصنوعی (ANN) بر اساس روش رگرسیون غیرخطی چندگانه (MNLR) برای تخمین میانگین ماهانه مجموع روزانه تابش کلی خورشید در هر محل از استان کرمانشاه است. برای این منظور، داده‌های هواشناسی 23 ایستگاه در استان کرمانشاه در طول سالهای 1392- 1387 جمع‌آوری شد که از این بین، داده‌های 17 ایستگاه برای آموزش و 6 ایستگاه برای تست شبکه استفاده شد. در مرحله اول، همه متغیرهای مستق...
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