بهنوش امین زاده

[ 1 ] - تهیۀ نانوجاذب مهندسی با قابلیت حذف مواد آلی برای فیلترهای شنی تصفیۀ آب

فیلترهای شنی بخش ضروری فرایند‌های تصفیۀ متعارف‌اند. ذرات سیلیس فیلترهای تند شنی در حذف مواد آلی محلول، پتانسیل کمی دارند. با ایجاد پوششی از نانولوله‌های کربنی روی ذرات سیلیس، نه تنها می‌توان مشکلات استفاده از نانولوله‌های کربنی در حالت دوغابی را برطرف کرد، بلکه می‌توان پتانسیل فیلتر‌ها را در حذف مواد آلی محلول افزایش داد. در این تحقیق از روش‌های فیزیکی و شیمیایی برای پوشش نانولولۀ کربنی روی سیل...

[ 2 ] - تصفیۀ فاضلاب خشکشویی با استفاده از فرایندهای انعقاد و شناورسازی الکتریکی و الکتروفنتون

در تحقیق حاضر عملکرد فرایندهای انعقاد و شناورسازی الکتریکی با الکترودهای آلومینیومی و آهنی و فرایند الکتروفنتون، در تصفیۀ فاضلاب خشکشویی، تحت تأثیر متغیرهای شیمیایی و الکتروشیمیایی مانند pH، آرایش و تعداد الکترودها، چگالی جریان، زمان الکترولیز و غلظت پراکسید هیدروژن بررسی شد. پایلوت مورد استفاده شامل یک راکتور به حجم مفید 6/3 لیتر، منبع تغذیه و الکترودهای آهن یا آلومینیوم به ابعاد 1/0×9× 18 سان...

[ 3 ] - Treatment of dairy wastewater by graphene oxide nanoadsorbent and sludge separation, using In Situ Sludge Magnetic Impregnation (ISSMI)

The present research investigates the ability of graphene oxide nanosheets for treatment of dairy wastewater, using In Situ Sludge Magnetic Impregnation” (ISSMI) to separate sludge after adsorption process. To increase the interaction between magnetic nanoparticles and graphene oxide, the former has been functionalized, using 3-Aminopropyl triethoxysilane, with the synthesized graphene oxide an...

[ 4 ] - Treatment of dairy wastewater by graphene oxide nanoadsorbent and sludge separation, using In Situ Sludge Magnetic Impregnation (ISSMI)

The present research investigates the ability of graphene oxide nanosheets for treatment of dairy wastewater, using In Situ Sludge Magnetic Impregnation” (ISSMI) to separate sludge after adsorption process. To increase the interaction between magnetic nanoparticles and graphene oxide, the former has been functionalized, using 3-Aminopropyl triethoxysilane, with the synthesized graphene oxide an...

[ 5 ] - Autotrophic denitrification of synthetic nitrate-contaminated groundwater in up-flow fixed-bed bioreactor by pumice as porous media

Background: Increasing nitrate concentrations in groundwater resources is considered a common environmental and public health problem worldwide. In this research, an autotrophic up-flow bioreactor with pumice as media was used to study the effects of the sulfur-to-nitrogen (S/N) ratio and empty bed contact time (EBCT) on nitrate removal efficiency and byproducts. Methods: Experiments were car...

[ 6 ] - Optimizing electrocoagulation and electro-Fenton process for treating car wash wastewater

Background: Car wash wastewater contains several contaminants such as organic matter, oil, grease, detergents and phosphates, all of which are harmful for the environment. In this study, the application of electrocoagulation (EC) to treat car wash wastewater has been studied, and the operating parameters optimized. The electro-Fenton (EF) for further contaminant removal was also investigated. ...

[ 7 ] - اصلاح سطح کربن فعال گرانوله با روش تصفیه نهایی با هدف نیترات‌زدایی آب آشامیدنی

حضور نیترات در آب‌های زیرزمینی در دو دهه گذشته، نگرانی‌های زیادی را برای مدیران و نیز مصرف‌کنندگان آب به‌ویژه در بخش شرب و بهداشت ایجاد کرده است. از میان روش‌های مختلف حذف نیترات، استفاده از روش جذب به‌علت بازدهی بالا و همچنین ملاحظات اقتصادی بیشتر مورد توجه قرار گرفته است. در این تحقیق، از کربن فعال صنعتی با اندازه دانه‌های 4/0 تا 59/0 میلی‌متر (مش 30-40) به‌عنوان جاذب...

[ 8 ] - Assessment of Converter Sludge from Esfahan Steel Company as a Persulfate Nano-Activator for Permeable Reactive Barriers (Prbs) in Landfill Leachate Treatment

The present research studies the performance of Converter Sludge (CL)as a nano-activator of persulfate (PS) in Permeable Reactive Barrier (PRB) as an in-situ technology for leachate treatment.In batch experiments, the acidic conditions (pH = 3) have been the most suitable for removal operations, where COD and NH3 removal efficiencies are 69.15% and 60.96%, respectively. The Box–Behnken design (...

[ 9 ] - Assessment of Converter Sludge from Esfahan Steel Company as a Persulfate Nano-Activator for Permeable Reactive Barriers (Prbs) in Landfill Leachate Treatment

The present research studies the performance of Converter Sludge (CL)as a nano-activator of persulfate (PS) in Permeable Reactive Barrier (PRB) as an in-situ technology for leachate treatment.In batch experiments, the acidic conditions (pH = 3) have been the most suitable for removal operations, where COD and NH3 removal efficiencies are 69.15% and 60.96%, respectively. The Box–Behnken design (...

[ 10 ] - بررسی میزان فلزات سنگین در لجن آبگیری شده تصفیه خانه فاضلاب ساری

Background and purpose: Dewatered sludge of sewage treatment plants can be used in agriculture if required standards are followed. Heavy metals are among the chemical pollutants that are hazardous to health. Therefore, the aim of this study was to investigate the amount of heavy metals in dewatered sludge of municipal wastewater treatment plant and compare that with the standards and sludge of ...

[ 11 ] - Performance Comparison of Predictive Controllers in Optimal and Stable Operation of Wastewater Treatment Plants

Any proper operation could be translated as a constrained optimization problem inside a WWTP, whose nonlinear behavior renders its control problems quite attractive for performance of multivariable optimization–based control technique algorithms, such as NMPC. The main advantage of this control technique lies in its ability to handle model nonlinearity as well as various types of constraints on...

[ 12 ] - Improvement of Anaerobic Digestion of Sewage Sludge, Using Combined Hydrogen Peroxide and Thermal Pre-Treatment

The present study investigates the influence of individual and combined hydrogen peroxide and thermal pre-treatment of waste activated sludge on anaerobic digestion. For so doing, it employs anaerobic batch reactors in the mesophilic conditions. For comparison, soluble fractions of organic matter, biogas production, biochemical methane potential, removal of chemical oxygen demand (COD), and vol...

[ 13 ] - An investigation on absorption properties of exfoliated graphite for oil spill from Caspian Sea water

Oil spills are the most important environmental impact in oceans and seas. In this article, Oil absorption, which was explored from Sardar-e-Jangal oilfield in Caspian Sea, by exfoliated graphite (EG), was investigated. Graphite was exfoliated through the reaction of graphite-CrO3 intercalation compounds with hydrogen peroxide. The obtained absorbent was characterized by Brunauer-Emmett-Teller ...

[ 14 ] - Performance Comparison of Predictive Controllers in Optimal and Stable Operation of Wastewater Treatment Plants

Any proper operation could be translated as a constrained optimization problem inside a WWTP, whose nonlinear behavior renders its control problems quite attractive for performance of multivariable optimization–based control technique algorithms, such as NMPC. The main advantage of this control technique lies in its ability to handle model nonlinearity as well as various types of constraints on...

[ 15 ] - Improvement of Anaerobic Digestion of Sewage Sludge, Using Combined Hydrogen Peroxide and Thermal Pre-Treatment

The present study investigates the influence of individual and combined hydrogen peroxide and thermal pre-treatment of waste activated sludge on anaerobic digestion. For so doing, it employs anaerobic batch reactors in the mesophilic conditions. For comparison, soluble fractions of organic matter, biogas production, biochemical methane potential, removal of chemical oxygen demand (COD), and vol...