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Full-Text Articles in Engineering

Bioluminescence Resonance Energy Transfer (Bret) - Based Nanostructured Biosensor For Detection Of Glucose, Eugene Hwang Nov 2019

Bioluminescence Resonance Energy Transfer (Bret) - Based Nanostructured Biosensor For Detection Of Glucose, Eugene Hwang

Electronic Thesis and Dissertation Repository

Bioluminescence resonance energy transfer (BRET) is a distance dependent, non-radiative energy transfer, which uses a bioluminescent protein to excite an acceptor through resonance energy transfer. In this thesis, BRET technology is incorporated into a sensor comprised of a recombinant protein and quantum dots. The recombinant protein, which includes the bioluminescent protein, Renilla luciferase (Rluc), is used as the donor molecule and cadmium tellurium quantum dots as the acceptor molecules. Separating the donor-acceptor pair is a recombinant protein, glucose binding protein, which changes conformation upon binding glucose and brings the pair closer together, thus allowing BRET to occur. Optimization of the ...


Rotating Heater Pyrolyzer (Rhp): A New Pyrolysis Technology For Biochar Production, Ariel Porat Nov 2019

Rotating Heater Pyrolyzer (Rhp): A New Pyrolysis Technology For Biochar Production, Ariel Porat

Electronic Thesis and Dissertation Repository

Biochar provides an effective and inexpensive carbon sequestration technology to combat climate change. It is formed through a process known as pyrolysis; where biomass is thermally decomposed in the absence of oxygen. In this study, a new pyrolysis reactor called the Rotating Heater Pyrolyzer (RHP) was designed and built for biochar production. RHP derived biochar properties were compared to biochars produced with a standard batch pyrolysis reactor (Pyrolytic Shaker Reactor (PSR)) to determine RHP performance. Using several biochar characterization techniques, the soil amendment potential of two solid anaerobic digestate feedstocks were investigated. Woodchip RHP derived biochar processed between 2-3 hrs ...


Hydrodynamics Of Liquid-Solid And Three-Phase Inverse Circulating Fluidized Beds, Tian Nan Oct 2019

Hydrodynamics Of Liquid-Solid And Three-Phase Inverse Circulating Fluidized Beds, Tian Nan

Electronic Thesis and Dissertation Repository

The hydrodynamics of inverse liquid-solid circulating fluidized bed (ILSCFB) is experimentally studied in a 5.4 m tall and 0.076 m ID column. 5 types of low density particles are investigated with different particle terminal velocities.

Solids holdup distribution is found to be uniform in a wide range of superficial liquid velocities and over 10 solid circulation rates. Average solids hold is not sensitive to particle properties. Clustering phenomenon is found to be significant affecting the slip velocity in the ILSCFB. And the cluster phenomenon is directly related to particle R­eynolds number (Ret). Particles with little Ret ...


Progress Toward Durable Icephobic Materials, Matthew J. Coady Oct 2019

Progress Toward Durable Icephobic Materials, Matthew J. Coady

Electronic Thesis and Dissertation Repository

Ice accumulation is a major engineering challenge in many fields including aerospace, power generation, transportation, and infrastructure. A variety of solutions are being researched to address this challenge. Perhaps the most promising method of combating ice accumulation is by applying coatings with low values of interfacial ice adhesion strength, τice. Icephobic materials are those with ice adhesion below 100 kPa, and it has been shown that passive delamination can occur on surfaces with τice below 20 kPa. While various low adhesion surfaces have been prepared, durability concerns pervade applications where surfaces experience repeated icing or freeze-thaw cycles, mechanical ...


A Comprehensive Study Of Sequential Simulated Moving Bed: Purification Of Xylo-Oligosaccharides And Fructose-Glucose, Yan Li Oct 2019

A Comprehensive Study Of Sequential Simulated Moving Bed: Purification Of Xylo-Oligosaccharides And Fructose-Glucose, Yan Li

Electronic Thesis and Dissertation Repository

Chromatographic separation is a promising alternative for separation and purification of sugars in industry. Simulated moving bed (SMB) technique has been proven as an efficient chromatographic separation method due to its enhanced productivity and purity, reduced solvent consumption, convenient operating control, and improved separation performance for some systems with low resolution and selectivity. The sequential simulated moving bed (SSMB) is a modification of the conventional SMB process, which currently has some applications for sugar separation due to its low solvent consumption. This work mainly investigates the design strategy of the innovative SSMB process and explore its advantages and disadvantages over ...


Development Of A Co-Rotating, Fully Intermeshing Twin-Screw Extruder Model For The Extrusion Of Natural Fibre Suspensions, Keller J H George Sep 2019

Development Of A Co-Rotating, Fully Intermeshing Twin-Screw Extruder Model For The Extrusion Of Natural Fibre Suspensions, Keller J H George

Electronic Thesis and Dissertation Repository

Twin-screw extruders are continuous processing devices that have been used in many industries concerned with the processing of multiphase fibrous suspensions, such as the food and pulping industries. While these devices offer great flexibility due to their modularity and customizability, optimization for specific applications can be challenging due to the unavailability of reliable, global models with accurate predictive capabilities. Consequently, this work seeks to eliminate this knowledge gap with the development of a novel global, composite model capable of predicting key process outputs for suspension-processing, phase-separating, co-rotating, fully-intermeshing twin-screw extruders. Creation of the novel global algorithm involved the modification of ...


Evaluation Of Biohydrogen Production From Co-Fermentation Of Carbohydrates And Proteins, Emmanuel Andrew Tepari Jr, Sep 2019

Evaluation Of Biohydrogen Production From Co-Fermentation Of Carbohydrates And Proteins, Emmanuel Andrew Tepari Jr,

Electronic Thesis and Dissertation Repository

The aim of this study was to examine volatile fatty acid (VFA) production from a proteinaceous substrate, bovine serum albumin (BSA) for a pH range of 5 – 9, and to further assess its impact on hydrogen production in a co-fermentation process using starch and BSA at different ratios. The established optimum conditions for VFA production from BSA were an initial pH of 8, incubation time of 3 days and an operating temperature of 37 ℃. Using these fermentation conditions, the stoichiometric reactions that describe the anaerobic degradation of BSA were investigated. A methodology that describes organic acid production from BSA by ...


Numerical Studies On Hydrodynamics In Various Circulating Fluidization Systems, Zeneng Sun Aug 2019

Numerical Studies On Hydrodynamics In Various Circulating Fluidization Systems, Zeneng Sun

Electronic Thesis and Dissertation Repository

Various circulating fluidized bed (CFB) systems including gas-solid fluidization, liquid-solid fluidization, and gas-liquid-solid three-phase fluidization are numerically studied. With a comprehensive knowledge from the experiments, improved computational fluid dynamic (CFD) models are developed for detailed investigations on a wide operating range in the gas-solid CFB (GSCFB) system. The CFD model developed is also extended to study two new types of fluidized beds, an inverse liquid-solid circulating fluidized bed (ILSCFB) and a bubble induced fluidized bed (BIFB), as a supplement to the experimental work.

Flow structures and transitions from low-density operations to high-density operations in both GSCFB riser and downer are ...


Pyrolysis Of Miscanthus And Products Characterization, Arshdeep Singh Aug 2019

Pyrolysis Of Miscanthus And Products Characterization, Arshdeep Singh

Electronic Thesis and Dissertation Repository

Miscanthus, an invasive crop, has recently gained attention as an emerging energy crop because of certain features such as adaptability to lower temperature, efficient use of water and nutrients, low or no need of nitrogen fertilizers, high biomass yield, fast growing cycle and less intensive agricultural cultivation practices than other energy crops, such as corn.

The literature review is focused on the value-added applications and conversion of Miscanthus for bioenergy and biomaterial applications. The thermochemical conversion technologies reviewed in this chapter include pyrolysis, liquefaction, torrefaction and gasification, whereas biochemical conversion technologies include enzymatic saccharification and fermentation.

In this work, Miscanthus ...


In-Line Monitoring Of Lubricant Addition Through Passive Vibration Measurements In A V-Blender, Austin Cameron Aug 2019

In-Line Monitoring Of Lubricant Addition Through Passive Vibration Measurements In A V-Blender, Austin Cameron

Electronic Thesis and Dissertation Repository

Process analytical technologies can improve product monitoring and process efficiency in pharmaceutical manufacturing. Passive vibration measurements were evaluated for their potential as a technique to monitor lubricant dispersal in a V-blender. An accelerometer was attached to the lid of a V-blender shell to measure vibrations from particle collisions. Lubricants formed a layer around the surface of particles, altering energy dissipation upon impact. With mixing, vibrational amplitudes approached a stable value indicating a mixing end-point. Mixing profiles were sensitive to changes in particle type, particle size and distribution, and lubricant concentrations for ideal particles and pharmaceutical granules. Axial loading configurations provided ...


Hydrodynamics Studies Of Air Dense Medium Fluidized Bed With Binary Mixtures For Dry Coal Beneficiation, Zhijie Fu Jul 2019

Hydrodynamics Studies Of Air Dense Medium Fluidized Bed With Binary Mixtures For Dry Coal Beneficiation, Zhijie Fu

Electronic Thesis and Dissertation Repository

A systematic and comprehensive study of fluidization hydrodynamics and separation properties was conducted in a bench-scale and a semi-industrial Air Dense Medium Fluidized Bed (ADMFB) systems for dry coal beneficiation. In order to achieve the adjustment of fluidized bed density for efficient dry gravity separation, various types of binary mixtures of solid particles were tested and used as the medium materials in ADMFB. Fluidization hydrodynamics including minimum fluidization velocity, fluidized bed expansion, solids mixing/segregation, and bed density distribution were carefully investigated. A series of continuous experiments of raw coal dry beneficiation were successfully implemented in a semi-industrial ADMFB system ...


Characterization Of Tetrazolium Salts And Formazans Using Computational Chemistry For Radiochromic Dosimetry, Teshome G. Bedada Jul 2019

Characterization Of Tetrazolium Salts And Formazans Using Computational Chemistry For Radiochromic Dosimetry, Teshome G. Bedada

Electronic Thesis and Dissertation Repository

Computational chemistry is a powerful tool to model different materials and predict their physical and chemical properties. The goal of this thesis was to apply different computational chemistry tools to model the properties of two classes of closely related organic compounds: formazans and tetrazolium salts for ionizing radiation dosimetry in water-based gels, whereby the absorbed dose is registered by optical detection of formazan formation from tetrazolium salts. The structural parameters of phenyl and benzothiazolyl-substituted tetrazolium salts and formazans were computed using the APFD density functional theory (DFT) model and 6-311+G(2d,p) basis set. Conformational searching of stereoisomers (TSCA ...


A Ph-Sensitive Delivery System For The Prevention Of Dental Caries Using Salivary Proteins, Yi Zhu May 2019

A Ph-Sensitive Delivery System For The Prevention Of Dental Caries Using Salivary Proteins, Yi Zhu

Electronic Thesis and Dissertation Repository

Dental caries remains one of the most common chronic diseases worldwide. Salivary proteins such as histatins have demonstrated biological functions directly related to tooth homeostasis and prevention of dental caries. However, histatins are susceptible to the high proteolytic activities in the oral environment. Therefore, pH-sensitive chitosan nanoparticles (CNs) have been proposed as potential carriers to target major oral diseases that occur under acidic conditions (e.g. dental caries and dental erosion). Four different types of chitosan polymers were investigated and the optimized CNs successfully loaded histatin 3 and released it selectively under acidic conditions. Through loading the survival time of ...


Experimental Investigations On The Instantaneous Flow Structure In Circulating Fluidized Beds, Xiaoyang Wei Apr 2019

Experimental Investigations On The Instantaneous Flow Structure In Circulating Fluidized Beds, Xiaoyang Wei

Electronic Thesis and Dissertation Repository

Knowing the instantaneous flow structure is of great importance for the understanding of gas-particle interaction and for the prediction of reactor performances. In this thesis, a systematic and comprehensive study has been conducted on the instantaneous flow structure in a narrow rectangular riser (19 mm in thickness, 114 mm in width and 7.6 m in height), in a cylindrical riser (76 mm in diameter, 10.2 m in height) and in a cylindrical downer (50 mm in diameter, 4.9 m in height). A wider range of operating conditions has been achieved in risers and downer with superficial gas ...


Enhanced Oxidative Transformation Of Conventional And Emerging Organic Contaminants By Visible And Solar Light Driven Photocatalysis And Activated Ferrate(Vi), Malini Ghosh Apr 2019

Enhanced Oxidative Transformation Of Conventional And Emerging Organic Contaminants By Visible And Solar Light Driven Photocatalysis And Activated Ferrate(Vi), Malini Ghosh

Electronic Thesis and Dissertation Repository

Nowadays, the release of different new contaminants, also known as emerging contaminants, in water and wastewater bodies are increasing with each passing day. Emerging contaminants primarily include pharmaceutical and personal care products and endocrine disruptors. Advanced oxidation processes are receiving an immense importance in the last few decades due to their abilities to degrade a vast range of organic and inorganic pollutants. This thesis explores the efficiency of different advanced oxidation processes in degrading emerging pollutants as well as conventional organic pollutants. Heterogeneous photocatalysis is a well-studied advanced oxidation process, which involves the use of light energy to excite semiconducting ...


Effect Of Coagulant Recycling On Chemically Enhanced Primary Treatment Performance, Tulip Chakraborty Apr 2019

Effect Of Coagulant Recycling On Chemically Enhanced Primary Treatment Performance, Tulip Chakraborty

Electronic Thesis and Dissertation Repository

Chemically enhanced primary treatment (CEPT) process is a promising method for carbon redirection and improving the performance and efficiency of wastewater treatment processes. CEPT is employed to precipitate colloidal and suspended matter from wastewater; however, this requires a significant amount of coagulant and produces large volumes of sludge. Coagulant recovery (CR) from the precipitated sludge has the potential to reduce sludge quantities, associated costs for disposal of sludge, cost of dosing fresh coagulant by regenerating and purifying the coagulant before reuse. This research was conducted to understand the feasibility and implications of CR in municipal wastewater.

In order to evaluate ...


Synthesis Of Chemically Stable Vo2 Particles Using Green Solvents And Their Application As Smart Coatings, Dicho Zomaya Apr 2019

Synthesis Of Chemically Stable Vo2 Particles Using Green Solvents And Their Application As Smart Coatings, Dicho Zomaya

Electronic Thesis and Dissertation Repository

Heating and cooling buildings consumes a tremendous amount of energy worldwide, often >50% for Northern climates such as Canada. A major part of this energy is lost through windows. The use of thermochromic windows provides a new intriguing option, in which the window automatically regulates the amount of solar transmission in response to environmental temperature changes. Of the potential thermochromic materials, vanadium dioxide (VO2) is known to display a fully reversible semiconductor-metal transition (SMT). VO2 responds thermochromically to environmental temperature changes by changing its crystal structure as a function of temperature. VO2 is transparent to infrared radiation ...


Microwave And Ultrasonic Assisted Synthesis Of Zeolites From Coal Fly Ash In Batch And Circulating Batch Operation, Tahani Hassn Aldahri Apr 2019

Microwave And Ultrasonic Assisted Synthesis Of Zeolites From Coal Fly Ash In Batch And Circulating Batch Operation, Tahani Hassn Aldahri

Electronic Thesis and Dissertation Repository

This research was focused on the production of zeolites from CFA throughutilizing ultrasound and microwave power. The initial conventional heating process of 6 h prior to microwave irradiation for samples with high solid-to-liquid (S/L) ratio (CFA mass/ NaOH solution volume) led to a higher yield of zeolite and decreased the synthesis time and consumption of energy,while keeping the high quality of the synthesized zeolite intact. The crystal growth of the nuclei generated over 6 h of conventional hydrothermal treatment was enhanced by the post-microwave heating. Ultrasound-assisted zeolitizationCFA was also applied in this research.

When ultrasound energy was applied ...


Non-Classical Nucleation Phenomena Study And Following Process Monitoring And Optimization In Solution Crystallization Process, Zhenguo Gao Apr 2019

Non-Classical Nucleation Phenomena Study And Following Process Monitoring And Optimization In Solution Crystallization Process, Zhenguo Gao

Electronic Thesis and Dissertation Repository

Nucleation is a crucial step in the solution crystallization process. Despite their good development, classical nucleation theory and two-step nucleation theory cannot explain all the nucleation phenomena, especially for the non-classical nucleation phenomena which include oiling out, gelation and non-monotonic nucleation. Accordingly, for the non-classical nucleation systems, the crystallization processes are seldom designed based on the nucleation monitoring and supervision. In this thesis, crystallization process optimization was conducted to study the mechanism of non-classical nucleation phenomena and in-line process monitoring technology development.

Two kinds of non-classical nucleation phenomena with non-monotonic nucleation rate and gel formation were investigated, and accordingly, two ...


Investigation And Modeling Of The Dip Coating For Dispersions With Near Wall Effects, Mahdieh Moghadasi Mar 2019

Investigation And Modeling Of The Dip Coating For Dispersions With Near Wall Effects, Mahdieh Moghadasi

Electronic Thesis and Dissertation Repository

The key to controlling the quality of liquid dispersion coated films lies in the particle distribution in the flow field. The control of particle dispersion in the film can also empower the optimization of the process operation. Therefore, a numerical simulation of a solid-liquid suspension in the dip coating (free withdrawal) process using the finite element method for the fluid flow has been developed. The neutrally buoyant suspension is considered as a Newtonian fluid with a concentration-dependent viscosity. A continuum constitutive equation is employed based on the diffusive flux model in twodimensional flow. The main purpose of this study is ...


Analysis And Control Of Aluminum Concentration In Groundwater: Mathematical Modelling And Laboratory Study, Daria Popugaeva Feb 2019

Analysis And Control Of Aluminum Concentration In Groundwater: Mathematical Modelling And Laboratory Study, Daria Popugaeva

Electronic Thesis and Dissertation Repository

The remediation of metal-contaminated natural water bodies is prioritized due to metals toxicity, non-biodegradable properties, and accumulative behaviours leading to the increased incidence of adverse health effects. Current investigation is driven by the existing problem of elevated aluminum concentrations in the groundwater of Khibiny alkaline massif (Kola Peninsula). The prohibitive aluminum level exceeding the accepted standard of 0.20 mg L−1 is described as a serious health concern when the groundwater used for the local water supply. The results of comprehensive field data analysis based on chemometric methods applied to the available monitoring data including 12 groundwater quality parameters ...


Propane Oxidative Dehydrogenation Under Oxygen-Free Conditions Using Novel Fluidizable Catalysts: Reactivity, Kinetic Modeling And Simulation Study, Samira Rostom Nov 2018

Propane Oxidative Dehydrogenation Under Oxygen-Free Conditions Using Novel Fluidizable Catalysts: Reactivity, Kinetic Modeling And Simulation Study, Samira Rostom

Electronic Thesis and Dissertation Repository

Propane oxidative dehydrogenation (PODH) was studied using VOx/γAl2O3 and VOx/ZrO2-γAl2O3 (1:1 wt.%) catalysts, as well as consecutive propane injections under oxygen-free conditions. These catalysts were synthesized with 2.5, 5 and 7.5 wt.% vanadium loadings, and prepared using a wet saturation impregnation technique. Different characterization techniques were used to establish catalyst properties including NH3-TPD, pyridine FTIR and NH3-TPD kinetics. As well, PODH runs in the CREC Riser Simulator were developed under oxygen free atmospheres at 500-550°C, close to 1 atm., 10-20 ...


Piston Modelling And Gas-Solid Mixing Characterization In Jbr, Tian Dong Cai Nov 2018

Piston Modelling And Gas-Solid Mixing Characterization In Jbr, Tian Dong Cai

Electronic Thesis and Dissertation Repository

The Jiggle Bed Reactor (JBR), a batch fluidized bed microreactor, is inexpensive and easy to operate with a small amount of solids. The main goal of this thesis was to provide practical tools for the design and operation of JBR systems that will ensure good gas-solids mixing.

A model was developed to predict the piston motion. The model uses four empirical parameters that change depending on the equipment characteristics. Two parameters characterize the gas supply to the piston and two parameters are used to describe the frictional forces on the piston. The model was validated with high speed video.

Experiments ...


Extraction Of Astaxanthin From H. Pluvialis Using Deep Eutectic Solvents, Roya Barzegar Oct 2018

Extraction Of Astaxanthin From H. Pluvialis Using Deep Eutectic Solvents, Roya Barzegar

Electronic Thesis and Dissertation Repository

Haematococcus pluvialis (H. pluvialis) is one of the main sources of astaxanthin, a high value carotenoid and a strong antioxidant. Astaxanthin extraction is hindered by the thick cell wall of H. pluvialis which is composed of sporopollenin. Mechanical cell disruption methods, high cost and energy-consuming, are required to enhance astaxanthin extraction. This study employed a novel technology using deep eutectic solvents (DESs) to demonstrate the possibility of direct extraction of astaxanthin without a disruption step. It was established that 68% of astaxanthin can be extracted from intact H. pluvialis cells using choline chloride-glycerol (ChCl-G) mixture with 12.5% (v/v ...


Electrocatalysts With High Activity And Stability For Polymer Electrolyte Membrane Fuel Cells, Zhongxin Song Sep 2018

Electrocatalysts With High Activity And Stability For Polymer Electrolyte Membrane Fuel Cells, Zhongxin Song

Electronic Thesis and Dissertation Repository

In addressing the activity and durability challenges facing electrocatalysts in polymer electrolyte membrane fuel cells (PEMFCs), atomic layer deposition (ALD) is emerging as a powerful technique for deposition of noble metals and transition metal oxides due to its exclusive advantages over other methods. The primary advantages of ALD are derived from the sequential, self-saturating, gas-surface reactions, and angstrom level control that take place during the deposition process. Therefore, ALD possesses the advantage in precisely control the particle size and uniform distribution on the substrate. By forming chemical bonds between the initial layer of ALD precursor and support atoms during the ...


Hydrogen Production By Photocatalytic Water Splitting Under Near-Uv And Visible Light Using Doped Pt And Pd Tio2, Bianca Rusinque Sep 2018

Hydrogen Production By Photocatalytic Water Splitting Under Near-Uv And Visible Light Using Doped Pt And Pd Tio2, Bianca Rusinque

Electronic Thesis and Dissertation Repository

Photocatalysis is a promising methodology for hydrogen production. It involves the use of an unlimited source of energy, sunlight, and a semiconductor material to split water with zero carbon emissions.

This Master’s thesis reports high efficiencies in terms of hydrogen production via water splitting using 2.0v/v% ethanol as scavenger, platinum and palladium as noble metals on TiO2 photocatalysts at three metal loadings (1.0, 2.5 and 5.0wt%). Both near UV and visible light were used in the studies developed. These photocatalysts were synthetized using a sol-gel method whose morphological properties were enhanced due to ...


Chemical Modification Of Lignin Into Advanced Materials, Soheil Hajirahimkhan Aug 2018

Chemical Modification Of Lignin Into Advanced Materials, Soheil Hajirahimkhan

Electronic Thesis and Dissertation Repository

Fossil fuel resources are being used today for most of humankind’s energy and chemical/material needs. The inevitable demise of these resources has created significant interest in the field of biomass and particularly, lignin valorization. As the world’s second most abundant polymer, more than 98% of the annually produced lignin is under-utilized either as an on-site heat source, or as landfill. Thus, finding practical approaches to modifying this inexpensive sustainable resource into materials of high value can be the next leap in lessening the dependence on fossil fuel resources and thus, developing a sustainable future.

In this thesis ...


Biohydrogen Production From Synthetic Lignocellulosic Hydrolysates: Acclimatization And Inhibition, Basem Mikhaeil Fawzy Haroun Aug 2018

Biohydrogen Production From Synthetic Lignocellulosic Hydrolysates: Acclimatization And Inhibition, Basem Mikhaeil Fawzy Haroun

Electronic Thesis and Dissertation Repository

The growing concerns regarding climate change, population growth, depletion of fossil fuel, and pollution arising from the combustion of petroleum-based fuel can be identified as the most important factors driving the urgent need for environmentally friendly renewable energy. Among all the recognized alternatives to gasoline-based fuel, hydrogen is not only considered as a clean energy but also it has a high energy content of 142 kJ/g which is almost three times higher compared to other fossil fuels. Only water and heat are the by-products of hydrogen combustion. Dark fermentative hydrogen production is a feasible option in which inexpensive, low-grade ...


Plant Stimuli-Responsive Biodegradable Polymers For The Use In Timed Release Fertilizer Coatings, Spencer Heuchan Aug 2018

Plant Stimuli-Responsive Biodegradable Polymers For The Use In Timed Release Fertilizer Coatings, Spencer Heuchan

Electronic Thesis and Dissertation Repository

The use of nitrogen-based fertilizers continues to accelerate with human population growth and increases in global food requirements. Enhanced efficiency fertilizers (EEFs) have been developed to improve the synchronization between nutrient supply and crop nutrient demand. However, many of the current controlled release fertilizers are coated with non-degradable polymers that contribute to accumulation of microplastics within ecosystems. This thesis describes research towards the development of a new class of fertilizer coatings using a self-immolative polymer known as poly (ethyl glyoxylate) (PEtG). PEtG itself does not have suitable properties to produce a viable coating but once blended with another degradable polyester ...


Anaerobic Digestion Of Aqueous Pyrolysis Condensate, Connie Wen Aug 2018

Anaerobic Digestion Of Aqueous Pyrolysis Condensate, Connie Wen

Electronic Thesis and Dissertation Repository

Lignocellulosic material can be subjected to pyrolysis to yield pyrolysis liquid, biochar, and gas. The pyrolysis liquid resulting from the condensation of vapours can be separated into a rich organic condensate and an acidic “aqueous pyrolysis condensate” (APC) which may be considered a waste. The target of this research is subjecting APC to anaerobic digestion to produce biogas that can be energy purposed, and to reduce the organic load of APC to acceptable levels for possible disposal. From this study, it was found that without any treatment, the inoculum requires 50 to 60 days of adaptation period to reduce the ...