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Study of the Effect of Ozonation in Reducing Mambrane Fouling
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jallaledin (Supervisor) ; Hazrati, Hossein (Co-Advisor)
Abstract
Membrane bioreactors (MBRs) are a combination of activated sludg and mebrane technology. MBRs have been widely used as an advanced process for urban and industrial wastewater-treatment in recent years. Membrane fouling is the main issue that limits their performance and therefor, many studies have concentrated on testing different ways to mitigate the fouling. Ozonation process, that has been proved to reduce the MBR fouling, is studied in this project. Ozonation can provide the conditions for flocculation and therefor improves mixed-liqure properties. Ozon at two concentrations, 0.2 and 0.9 mg/lit was tested. Although results show little change in COD (chemical oxygen demand), but membrane...
Prediction of rate of penetration in directional drilling using data mining techniques
, Article Journal of Petroleum Science and Engineering ; Volume 221 , 2023 ; 09204105 (ISSN) ; Jamshidi, S ; Sharif University of Technology
Elsevier B.V
2023
Abstract
Rate of penetration (ROP) represents drilling speed and its productive time during drilling operations in oil and gas wells. A predictive model that links ROP to its influential parameters is essential to optimize ROP for minimizing drilling costs. This study implements a comprehensive data mining approach utilizing Python toolboxes to improve ROP prediction in directional wells, which has not been addressed as much as vertical wells with respect to the downhole weight on the bit (WOB) and cutting transport. To do so, seven functions, including influential parameters, were identified to impact ROP in directional drilling. Drilling data of seven directional wells from an offshore rig in a gas...
Application of Metallic Nanoparticles in Treatment of Wastewater Containing Dyestuffs
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jalalaldin (Supervisor)
Abstract
Textile industrial wastewaters are one of the most important sources of environmental contaminants. In the recent years, use of advanced oxidation processes, by producing highly active and reactive components such as hydroxyl radicals has been proposed. The aim of this research is oxidative degradation of methylene blue dye using Cu-nanoparticles immobilized on a polymer support with H2O2 as an oxidant reagent.In general, oxidative degradation of methylene blue with hydrogen proxide in the presence of immobilized CuO nanoparticles on a polymer support as the catalyst was studied. We used polyamidoamine (PAMAM) dendrimer as the polymer support for nanoparticles. fourth generation of PAMAM was...
Bioremediation of Contaminated Soil by Hydrocarbon
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jalaloddin (Supervisor)
Abstract
This research was done in order to test the capability of endemic microorganisms in treating hydro-carbonic pollutants found in the soil specimens of Assaluye industrial region. To find the optimum conditions for treating the contaminations, we tried several amounts of substrate as well as temperature and humidity. The total concentration of hydrocarbon compounds in polluted soil samples was measured by both infrared spectrometry and gas chromatography, in treatment process after extraction. The results show that, having 50mg substrate per 1kg of contaminated soil added and keeping humidity at 11%, in a 60-days course the level of initial pollution decreased by 60%. 10 degrees increase in...
Performance of Activated Sludge System at Different Weather and Solution for Upgrading
,
M.Sc. Thesis
Sharif University of Technology
;
Shaygan Salek, Jalaloddin
(Supervisor)
Abstract
Over 90 percent of the wastewater treatment systems use activated sludge which, yields to increase in organic loadings, these systems do not have appropriate performance. For upgrading of these systems a UASB reactor has been used prior to the activated sludge system, to improve the system performance and also reduce the excess sludge production. A membrane was also used instead of the sedimentation tank, to betterment the effluent quality. COD influent concentration was about 600 to 2400 mg/l, up to 98 percent of COD reduction obtain in this system. Also excess sludge reduction was over 90%. Such a system upgrading will increase treatment capacity by factor of 5. As it was shown, for UASBR,...
Designing Granular Sequencing Batch Reactor for Investigating the Effect of Influent Feeding Alkalinity and Rreactor pH on Aerobic Granulation
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jalal (Supervisor)
Abstract
Laboratory experiments were carried out to investigate the effect of influent alkalinity and reactor pH on microbial species, morphology and performance efficiency of aerobic granules. The experiments were conducted in two L sequencing batch reactors (R1-R2) with different influent alkalinity and pH medium. pH in R1 ,with high influent alkalinity, was in the range of 7-7.5 and pH in R2 was adjusted in 4.5-5.5. The experimental results demonstrated that the dominated microbial species and structure of granules were different in two rectors. Acidic environment of R2 provide favorable condition for fungal growth and granules formed within first week of operation. On the other hand in R1,...
Control of the Activated Sludge System Using Neural Network Model Predictive Control
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Activated sludge systems are widespread biological wastewater treatment systems that have a very complex and nonlinear dynamics with a wide range of time constants and, as a consequence, are difficult to model and control. On the other hand, using neural networks as function approximators has provided a reliable tool for modeling complex dynamic systems like activated sludge. In this study a multi-input multi-output neural network model predictive controller (NNMPC) is developed and tested based on the basic control strategy of a benchmark simulation model (called BSM1) suggested by european co-operation in the field of science and technical research (COST) actions 682/624. The controller...
Thermophilic Anaerobic Digestion of Organic Fraction of Municipal Solid Waste
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Due to the large portion of organic fraction of municipal solid wastes in Iran, the needing for stabilization and treatment of this waste is obvious. An appropriate method for treatment of these wastes is anaerobic digestion. By skimming through open literature which are investigated about anaerobic bioreactors, declared that despite the benefits of thermophilic bioreactors over mesophilic ones, (more destruction of pathogens, more removal of volatile solids, more production of biogas and greater resilient to organic loading rate shocks) but because of more difficulties in controlling of thermophilic bioreactors, most studies have been done in mesophilic state. This motivated us to a deeper...
Evaluate the kinetic of Containment Removal and Improving the Effect of the Biological Factors on Membrane Bio Reactors and Fouling Problem
, M.Sc. Thesis Sharif University of Technology ; Shaygan SaleK, Jalaloddin (Supervisor)
Abstract
In this study as representatives of alkenylbenzenes and mono-alkylbenzenes respectively were considered individually and as binary mixtures. It was observed that styrene, and ethyl benzene were inhibitory types of substrates across the tested concentration ranges. Thus, biodegradation kinetic is well described by the Haldane model. Kinetic parameter's assessments from single substrate degradation tests and these parameters were used to predict possibly interaction factors achieved from dual substrate experiments. The achieved outcomes from mixture of experiments revealed that the ratio of depletion for each substrate is affected by the presence of the other. It was also inferred that ethyl...
Investigation of Nanoparticles Removal from Industrial Wastewater
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Nanotechnology as an interdisciplinary science is used in many fields. The use of nanomaterial, make new opportunities in the industry. However, safety issues and environmental risks of the consequences of their use in various applications are the matters of concern. Because of the new emergence of this technology, it is essential that all aspects including possible harmful effects on the environment will also be considered. One way to remove the nanoparticles, is electrocoagulation method, assemble nanoparticles into larger particles with an electric current. In this study, the removal of titanium dioxide nanoparticles, due to its high use in the industry, with electrocoagulation method and...
Application of Membrane Distillation Technology for Treating Saline Water of Sarcheshme Copper Refinery
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jalaleddin (Supervisor)
Abstract
Sarcheshme Copper refinery is using ion exchange columns to supply deionized water to the refinery. Every day, 240 cubic meters of waste water from ion exchange columns process are released in nature. The main purpose of this research is to use membrane distillation to purify this wastewater, which reduces the fresh water requirement and at the same time prevents environmental pollution. Membrane distillation technology is capable to purify the high salinity wastewater that other conventional membrane technologies are not able to purify. In this study, the PTFE membrane was used due to its high permeability and low surface energy with pore size of 0.22 μm and membrane thickness of 0.2 to...
Optimization of an Integrated Reservoir-Production System Using Polynomial Chaos Expansion and Sobol Sensitivity Analysis
, Article SPE Reservoir Evaluation and Engineering ; Volume 26, Issue 3 , 2023 , Pages 938-956 ; 10946470 (ISSN) ; Jahanbakhshi, S ; Shaygan, K ; Jamshidi, S ; Sharif University of Technology
Society of Petroleum Engineers (SPE)
2023
Abstract
Integrated reservoir-production modeling is a collaborative multidisciplinary tool that can facilitate optimization of oil and gas production operations during the field development planning stage of exploiting subsurface resources. The critical issue with this technique is the excessive computational burden of the large integrated model with many input variables, which has not been effectively addressed to date. This study aims to reduce the computational costs and runtimes associated with the production integration and optimization process from oil fields. To do so, the reservoir and the surface network models of an Iranian oil field were coupled to create an integrated model for the...
Design and Construction the Low Cost Catalyst for Removal of VOCs from Air
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Nowadays, increased pollutants in the air threat the society health condition and Volatile Organic Compounds (VOCs) are the most hazardous ones among them. In the present study, catalytic oxidation as a prominent of the VOCs removal method from air, have attracted attentions due to high removal efficiency and suitable kinetic reaction. Because of its common industrial applications, toluene is intended to be eliminated through a low cost carbon supported catalyst which is synthesised in the laboratory. Construction method, carbonaceous support type, catalyst metal and its load, calcination temperature and time are among influencing design characteristics. A combination of Impregnation and...
Treatability Study of Industrial Slaughterhouse Wastewater
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Almost all of the animal slaughter is done in slaughterhouses. Environment concerns about slaughterhouse industries have been increased as increase in their production. In this study, a DAF+SBR system was used for treatment of industrial slaughterhouse wastewater and efficiency of this system was evaluated.In DAF, we used anionic polymer and PAC as coagulant. We reached best composition in 2 ppm of AP and 200 ppm of PAC. After that DAF system run in different pressures to estimate the best operational pressure & A/S. Best operational pressure and A/S is 4 bar and 0.038. After pretreatment, biological treatment by using SBR reactor was carried out. The results of the SBR reactor showed that...
Design and Construction of Aerobic Granulation Reactor in Order to Study the Effect of Cationic Polymer on Granular Formation
, M.Sc. Thesis Sharif University of Technology ; Shaygan Salek, Jalaloddin (Supervisor)
Abstract
Despite many advantages of granular sludge in anaerobic reactors (e.g. UASB), over the past few years research attention had turned towards developing aerobic granular sludge. Although much research is carried out on the formation of aerobic granules, less work is reported on how to enhance granules characteristics such as increasing in granule size, concentration, durability and stability. The aims of this study are to investigate the effects of cationic polymer on granule formation and the way to improve granule characteristics. For this purpose two SBR reactors (0.15 m diameter and 1.8 m height, R1 and R2) were used by feeding synthetic wastewater (diluted molasses, COD ranging from 1400...
Development of Directional Drilling Key Performance Indicators (KPIs) for Optimization Purposes
, M.Sc. Thesis Sharif University of Technology ; Jamshidi, Saeed (Supervisor) ; Fazaelizadeh, Mohammad (Co-Supervisor)
Abstract
In drilling operations, cost, time, and quality are the three factors to consider for evaluation. Drilling optimization means reducing project costs and completing them as quickly as possible while still meeting the standards. Due to the complexity and specificity of directional drilling and the increasing need for this type of drilling, optimizing the directional drilling operation is of great importance. Drilling rate of penetration and hydromechanical specific energy are considered as two main indicators of drilling performance in this thesis. In the first step, drilling rate of penetration is predicted using drilling data and machine learning algorithms and then single-objective and...
Oil Separation from Contaminated Condensates WithFuel in Power Plant by Flotation &Solvent Sublation
,
M.Sc. Thesis
Sharif University of Technology
;
shaygan, Jalaloddin
(Supervisor)
;
Jalali, Morteza
(Supervisor)
Abstract
Some of the thermal power plants use heavy fuel oil as an auxiliary fuel instead of the fuel gas, especially in the cold seasons. In these plants, in order to reduce fuel viscosity, heavy fuel oil is heated in several stages including fuel storage tank, connection lines and oil supply to burner by heat exchange with returned steam from the turbine, which can lead to fuel leakage into the condensates. This contamination is in addition to the contamination that has resulted from leaking seals on steam driven equipments, such as pumps and turbines. Reusing these contaminated condensates as boiler feed water can lead to coking of hydrocarbons and deposition of a hard scale on boiler tube walls....
Feasibility Study of Using Molten Carbonate Fuel Cell for CO2 Capture from Exhaust Gases of Internal Combustion Engines
, M.Sc. Thesis Sharif University of Technology ; Roshandel, Ramin (Supervisor) ; Shaygan, Jalaloddin (Co-Advisor)
Abstract
According to, increasing use of energy in the world, issues such as increasing reenhouse gas’ emission, rising temperature on planet earth and air pollution have appeared Carbon dioxide is a major greenhouse gas that has a significant impact on increasing the temperature of earth. In recent years, attentions to carbon dioxide capturring and sequestration technologies have been increased. In this project molten carbonate fuel cell which is used as a new method for separating carbon dioxide from gaseous compounds of combustion process, is discussed. The aim of the project is to, investigate technical and
economic feasibility of using molten carbonate fuel cell for separating carbon...
economic feasibility of using molten carbonate fuel cell for separating carbon...
Bioremediation of Gas Condensate Contaminated Soil of Sarkhun Refinery
, M.Sc. Thesis Sharif University of Technology ; Shaygan, Jalaloddin (Supervisor)
Abstract
Goal of this project was study of local microorganism ability in remediation of hydrocarbon contamination exists in contaminated soil around Sarkhun refinery.In first phase of this study, evaluation of bioremediation performance was done. Using a standard method in a 20 days period, the ability of local microorganism exists in contaminated soil was studied. In this study, 3 different nutrient ratios for 7 samples, 21 experimental samples, were used. Nutrient ratios as C:N:P were: 100:0:0, 100:5:1, and 100:9:1. Results showed that in this remediation period, minimum remediation efficiency in all samples with nutrients is 50% and also the best nutrient ration is 100:5:1. An empirical model was...
Optimization and Offering a kinetic Model for Enzymatic Hydrolysis of Cellulosic Materials in a Membrane Bio-reactor
, M.Sc. Thesis Sharif University of Technology ; Soltanieh, Mohammad (Supervisor) ; Shaygan Salek, Jalaloddin (Co-Advisor)
Abstract
Regarding decreasing resources of fossil fuels and their increasing costs in addition to their environmental pollutions, today, producing bio fuels from wastes such as lignocellulosic materials is of great interest. A fundamental stage in conversion of lignocellulosic materials into bio fuels, such as bio ethanol, is the enzymatic hydrolysis of these materials to produce reducing sugars. Researches have shown high costs of this stage. Optimization of enzymatic hydrolysisconditions is a major step in economization of this process.In this work corn hull is used to produce glucose. Corn hull is a kind of lignocellulosic material that due to high carbohydrate content is used as substrate. Our...