Green Synthesis of Metal-Organic Framework Based Biopolymer for the Removal of Dye and Pharmaceutical Pollutants in Water

, Ph.D. Dissertation Sharif University of Technology Shahmansoori, Maryam (Author) ; Yaghmaee, Soheila (Supervisor)

Abstract

In this research, in order to overcome the limitations of the current wastewater treatment technologies, two types of green biocomposite, biocompatible, with high removal capacity for emerging pollutants from wastewater have been synthesized. The general steps of doing the work in this treatise for each category of biocomposite include green synthesis, processing and optimization of the synthesis method, structural characterization of the synthesized compounds, checking their performance to remove the model pollutant, investigating the effect of operational parameters on the removal efficiency, determining kinetics, isotherm and mechanism. And at the end was the assessment of biocomposite...

Mathematical Modeling of Upflow Biofilm Reactor for Wastewater Treatment

, M.Sc. Thesis Sharif University of Technology Kahrizi, Sajad (Author) ; Yaghmaee, Soheila (Supervisor) ; Kariminiaye Hamedani, Hamid Reza (Supervisor)

Abstract

By increasing of population, migration to urban area and industrial development, the concern of environmental pollution becomes more important. Wastewaters are one of the polluting agents which should be collected, treated and reused in a safe and healthy condition. Generally wastewater treatment systems are classified into two major groups, namely aerobic and anaerobic treatment systems.Anaerobic fixed bed reactors are used for decreasing the organic load of wastewater. Enhancement of microbial retention time by attaching the organisms to packings is the most significant advantage of this bioreactor which increases the removal efficiency of organic materials of strength wastewater.In this...

Studying the Effective Factors and Optimizing Enzyme (α-amylase) Separation in Multi-Enzyme Systems by Agarose Column Chromatography

, Ph.D. Dissertation Sharif University of Technology Ataallahi, Elahe (Author) ; Roosta Azad, Reza (Supervisor) ; Soheila Yaghmaee (Supervisor) ; Yeganeh Sarkandi, Shahin (Co-Supervisor)

Abstract

In all types of chromatography for the extraction and purification of proteins, a fixed substrate is needed with which the mobile phase containing the proteins interact with them. This fixed bed should contain grains that have characteristics such as sphericity, high surface area, hydrophilicity, binding power to functional groups, chemical stability, low specific absorption, reusability and low cost. Commercially, the most commonly substrates in the ranges of the molecular weight of proteins are agarose and dextran. Agar was extracted from Gracilaria salicornia seaweed and removal of ionic groups was investigated by three methods. In washing with isopropanol, the ionic groups were reduced...

Estimating watermarking capacity in gray scale images based on image complexity

, Article Eurasip Journal on Advances in Signal Processing ; Volume 2010 , December , 2010 ; 16876172 (ISSN) Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2010

Abstract

Capacity is one of the most important parameters in image watermarking. Different works have been done on this subject with different assumptions on image and communication channel. However, there is not a global agreement to estimate watermarking capacity. In this paper, we suggest a method to find the capacity of images based on their complexities. We propose a new method to estimate image complexity based on the concept of Region Of Interest (ROI). Our experiments on 2000 images showed that the proposed measure has the best adoption with watermarking capacity in comparison with other complexity measures. In addition, we propose a new method to calculate capacity using proposed image...

Achieving higher perceptual quality and robustness in watermarking using Julian set patterns

, Article IEE Proceedings: Information Security ; Volume 153, Issue 4 , 2006 , Pages 167-172 ; 17470722 (ISSN) Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2006

Abstract

Some of the most important classes of watermark detection methods in image watermarking are correlation-based algorithms. In these methods usually a pseudorandom noise pattern is embedded in the host image. The receiver can regenerate this pattern by having a key that is the seed of a random number generator. After that if the correlation between this pattern and the image that is assumed to have the watermark is higher than a predefined threshold, it means that the watermark exists and vice versa. Here, we show the advantage of using the Julian set patterns as a watermark, instead of the commonly used pseudorandom noise pattern. Julian set patterns can be regenerated in receiver with few...

Introducing a new method for estimation image complexity according to calculate watermark capacity

, Article 2008 4th International Conference on Intelligent Information Hiding and Multiedia Signal Processing, IIH-MSP 2008, Harbin, 15 August 2008 through 17 August 2008 ; 2008 , Pages 981-984 ; 9780769532783 (ISBN) Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2008

Abstract

One of the most important parameters in evaluating a watermarking algorithm is its capacity. In fact, capacity has a paradoxical relation with other two important parameters: image quality and robustness. Some works have been done on watermarking capacity and a few on image complexities. Most works on watermarking capacity is based on information theory and the capacity values which are calculated based on these methods are very tolerate. In this paper we propose a new method for calculating image complexity based on Region Of Interest (ROI) concept. After that we analyze three complexity measures named: Image compositional complexity (ICC), Quad tree and ROI method, with three different...

Introducing a two dimensional measure for watermarking capacity in images

, Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 25 June 2008 through 27 June 2008, Povoa de Varzim ; Volume 5112 LNCS , 2008 , Pages 213-220 ; 03029743 (ISSN) ; 9783540698111 (ISBN) Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2008

Abstract

One of the most important parameters in evaluating a watermarking algorithm is its capacity. Of course capacity has a paradoxical relation with two other important parameters: image quality and robustness. Generally, watermarking capacity is expressed by bit per pixel (bpp) unit measure. This measure does not show what the side effects would be on image quality and capacity. Therefore, we proposed a two dimensional measure named capacity curve which shows the effects of capacity on visual quality. In this measure we can find the amount of degradation by a numerical value for each modification in pixels. Our experimental results are compatible with previous works in this field. © 2008...

Using julian set patterns for higher robustness in correlation based watermarking methods

, Article 5th IEEE International Symposium on Signal Processing and Information Technology, Athens, 18 December 2005 through 21 December 2005 ; Volume 2005 , 2005 , Pages 358-362 Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2005

Abstract

Some of the most important classes of watermark detection methods in image watermarking are correlation based algorithms. In these methods usually a pseudorandom pattern is embedded in host image. Receiver can regenerate this pattern by having a key that is the seed of a random number generator. After that if the correlation between this pattern and the image that is assumed to have the watermark is higher than a predefined threshold, this means that the watermark exists and vise versa. In this paper we showed the advantage of using the Julian set patterns as a watermark, instead of commonly used pseudorandom noisy pattern. Julian set patterns can be regenerate in receiver with few...

Computing watermark capacity in images according to their quad tree

, Article 5th IEEE International Symposium on Signal Processing and Information Technology, Athens, 18 December 2005 through 21 December 2005 ; Volume 2005 , 2005 , Pages 823-826 Yaghmaee, F ; Jamzad, M ; Sharif University of Technology

2005

Abstract

Determining the capacity of watermark for images is a complex task. This capacity may be influenced by many factors such as the content of image and also the strength of watermark. In some recent works the image content has been considered for calculation of watermark capacity. One such approach is to use the Noise Visibility Function (NVF) introduced in [3]. In this paper we introduced a new method for finding NVF according to the quad tree representation of image instead of using pixel neighborhood data. Our experimental results showed that the depth of a pixel in image quad tree represents much information about the pixel and its maximum allowable distortion compared to pixel neighborhood...

Modeling and Simulation of Alcoholic Fermentation of Sugarcane Blackstrap Molasses

, M.Sc. Thesis Sharif University of Technology Soroush, Mohammad (Author) ; Yaghmaee, Sohila (Supervisor)

Abstract

Fed-batch fermentation is a valuable and cost-effective method for bio-based production of various products such as ethanol, which has various applications in various industries.In recent years, bioethanol production has been given special attention in many countries. For this reason, the mathematical modeling of production of these products is very important for their optimal and cost-effective production. Given the transient and dynamic nature of fermentation and its specific complexity, mathematical modeling of fed-batch bioreactors is difficult and complicated. In this research, an unstructured model was used to predict the production of ethanol from blackstrap sugar cane molasses based...

Optimization of Effective Parameters in Biological Extraction of Mo and Ni from Spent Catalyst

, M.Sc. Thesis Sharif University of Technology Ghojavand, Fatemeh (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

During oil refinement, solid catalysts which contain metals such as aluminum, tungstan, molybdenum and nickel are highly used. Following several times reductions and re-applications, their activity potentiality is decreased in a such a way that they can not be re-used., as a result of which they are treated as solid waste. Based on natural potentiality, microorganisms are defined as convertibles of solid compounds to extractive forms and soluble materials. This project aims at finding other factors that have more impact on biological extraction and determining optimal conditions for biological extraction in order to reach maximum extraction efficiency within discontinuous conditions. The...

Experimental Study of Hydrogen Production from Dairy Wastewater in the Annular Microbial Electrolysis Cell (AMEC)with Spiral Anode

, M.Sc. Thesis Sharif University of Technology Hassany, Masoud (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

In this project, energy in form of electricity and hydrogen was produced in microbial fuel cell and microbial electrolysis cell respectively. For reducing costs, a stainless steel mesh with graphite coating was used as anode electode. Also for increasing efficiency, anode was positioned in cells in a spiral mode. Efficiency of cells was investigated in batch and continuous mode. In this research, dairy wastewater was used as substrate.This wastewater not only has severe emissions, but also is high energy content. In the field of dairy wastewater treatment and hydrogen production in an microbial electrolysis cell wasn’t observed any article.At the first, wastewater was treated in two...

Computational Fluid Dynamic (CFD) of Fixed-Bed Reactor for Bio-treatment of Sulfur from Petroleum Cuts

, M.Sc. Thesis Sharif University of Technology kharghanian, Hosein (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

Bio-desulfurization is the sulfur removal process from organosulfur compounds by the action of microorganisms (which are capable of removing sulfur). Too many studies have been carried out in the use of biocatalysts for BDS process. In this project, we have used data obtained from a previous experiment in which a trickle bed reactor (diameter: 0.066 m, height: 0.6 m) and a Rhodococcus sp. 12891 starin immobilized on bed particles are used to produce diesel with low sulfur content. Sulfur concentration of inlet diesel is between 200ppm to 540 ppm. parameters of process are recycle Ratio , volumetric flow rate and sulfur content of inlet diesel.
A mathematical model for trickle bed...

Feasibility Study on Isolation of Native Microorganism for Bioleaching of Electronic Waste

, M.Sc. Thesis Sharif University of Technology Gheshlaghi, Mahraz (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

Accumulation of electronic wastes in the environment is one of the recent ecological problems. This type of wastes contain metallic and non-metallic elements which can contaminate the environment. On the other hand due to the high volume of precious and basic metals within e-waste, it could be considered as a secondary resource. Bioleaching is a suitable method for the recovery of metals from e-waste which, on the contrary to the conventional recycling methods in the industry, is both economically and ecologically efficient. The aim of this research is the isolation of native micro-organism and evaluating its ability in recovering copper from a mixture of computer, cellphone, fax and copy...

Biorecovery of heavy metals from oil waste water by adapted Thiobacillus Ferrooxidans

, M.Sc. Thesis Sharif University of Technology Molaei, Sima (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

Acidophilic microorganisms such as Thiobacillus ferrooxidans have the capability to carry out process of biorecovery of heavy metals. Its principle is the microbial production of the sulphuric acid and simultaneous recovery of metals. Acidithiobacillus ferrooxidans derives the energy for their metabolism from ferrous iron oxidation process which can be affected by the presence of heavy metals in the medium. In this study the ability of Acidithiobacillus ferrooxidans, on the biorecovery of heavy metals in shake flask has been investigated The adaptation of the Acidithiobacillus ferrooxidans to a kind of heavy metal such as Nickel, Cobalt, Vanadium, Molybdenum, Tungsten and the mixture of the...

Some Studies on Ability of Aspergillus Niger Mould in Recovery of Heavy Metals from Crude Oil Sludge.

, M.Sc. Thesis Sharif University of Technology Anahid, Sanaz (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

This study focused on the tolerance of fungi strains including Aspergillus niger, Aspergillus foetidus and Penicillium for different metals (Ni, Co, Mo, V, Mn, Mg, Fe, W and Zn ). Then Aspergillus niger was exposed to mixture of Mo, V and Mn (at a mass ratio of 1:2:6 as approximately present in the spent refinery processing catalyst). The degree of tolerance was measured from the growth rate in the presence of various metals and compared to a control which contained no metals. Effect of type of strains, type of metal and metal concentration on adaptive tolerance of fungus was evaluated. Adaptation experiments with single metals showed Aspergillus niger tolerated up to 1000 mg/l Ni, Zn, 1500...

Experimental Investigation of Effective Parameters on Performance of Micro-sized Bio-electrochemical Systems

, M.Sc. Thesis Sharif University of Technology Mehran, Narges (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

This study is a report on the fabrication of a novel single-chamber micro-structure microbial fuel cell consisting of spiral anode chamber. A 3×3 cm plexiglass plate with 1 mm thickness was used as main body. A spiral microchannel (1 mm in width and 226 mm in length) was cut using a laser beam as an anodic compartment. Two types of microbial fuel cells with the same anode electrode (stainless steel mesh) and different cathode electrodes (stainless steel mesh and carbon cloth) were constructed in order to investigate the effect of cathode electrode material on microbial fuel cell performance. In both batch and continuous mode, higher power density was obtained by microbial fuel cell with...

Elimination of Environmental Problems Caused by Leakage of Electrical Transformers Fluid (Askarel) by Biological Methods

, M.Sc. Thesis Sharif University of Technology Samadi, Aryan (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

Polychlorinated biphenyls are a group of hydrocarbons that are composed of two benzene rings and chlorine admixture on it. Due to their special properties, these materials were added to oils for years to improve their properties. These compounds have many industrial applications in various industries, such as the production of fluorescent lamps, adhesives, dyes, and especially as a cooling and insulating liquid as the Askarel oil in power transformers. Due to the properties of these compounds, which include stability and bioaccumulation in fatty tissues, the wide use of these substances causes environmental contamination and leads to a variety of cancerous diseases. Among the cleaning...

Study of Ability of Adapted Microorganisms in Bioleaching of Electronic Wastes

, M.Sc. Thesis Sharif University of Technology Nili, Sheida (Author) ; Yaghmae, Soheila (Supervisor)

Abstract

Among all electornical wastes, printed circuit boards (PCBs) of mobile phones and computers has more share than other e-wastes. E-wastes contains toxic and maybe worthable metals like copper, nickel, gold, silvet and etc. In this project, ability of Penicillin Simplicissimum in bio-leaching of copper and nickle in mobile phones PCBs, is studied. Daily production of this kind of e-wastes, requires an industrialized and economical method to help the environment. At the first step of this project, the fungi was adapted to e-waste. Then, optimization of pH and number of spores in inoculum of bioleaching by Penicillin Simplicissimum in non-conventional mediums (sugar, cheese water and molasses)...

Optimization of the Capability of Native Microorganisms Isolated from the Landfill of Electronic Wastes in Bioleaching of E-Waste

, M.Sc. Thesis Sharif University of Technology Arab, Bahareh (Author) ; Yaghmaei, Soheila (Supervisor)

Abstract

Given the complex structure of electronic waste and the difficulty of recycling it by traditional methods, the focus is mainly on biohydrometallurgy method, and in particular on bioleaching. To recover metals, various microorganisms are utilized in this method. In light of previous studies, cyanogenic bacteria have been widely used for the extraction of basic and precious metals. Among the species, indigenous microorganisms have a higher ability to resist toxic environments in the bioleaching of metals due to their adaptation by rapid changes in their metabolic system over time. The main objective of this study is to isolate indigenous microorganisms from electronic waste landfill for their...