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C.V. - Wojciech Budzianowski, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Fabrication Of Micro-Meltblown Filtration Media Using Parallel Plate Die Design, Mohammad A. Hassan
Fabrication Of Micro-Meltblown Filtration Media Using Parallel Plate Die Design, Mohammad A. Hassan
Mohammad Abouelreesh Hassan
Meltblown fibers are typically produced using a die technology based on the slot concept, an extension of the sheet die technology with a series of holes substituting the center rectangular slot of the sheet die. While this prevalent technology has met with considerable success, an economical, facile design would be desirable. In this study a new parallel plate die concept to fabricate micro-meltblown fibers that offers simplicity, ease of use, and low cost was examined. The new die concept had parallel plates forming channels for polymer melt to flow through with a set of air holes surrounding them. This die …
Procesy Cieplne I Aparaty (Lab), Wojciech M. Budzianowski
Design Analysis Of Fixed-Bed Synergic Adsorption Of Heavy Metals And Acid Blue 25 On Activated Carbon, M.T. Hernandez-Eudave, Adrian Bonilla-Petriciolet, M.R. Moreno-Virgen, C.K. Rojas-Mayorga, R. Tovar-Gomez
Design Analysis Of Fixed-Bed Synergic Adsorption Of Heavy Metals And Acid Blue 25 On Activated Carbon, M.T. Hernandez-Eudave, Adrian Bonilla-Petriciolet, M.R. Moreno-Virgen, C.K. Rojas-Mayorga, R. Tovar-Gomez
Adrian Bonilla-Petriciolet
This study reports the multicomponent adsorption of dye AB25, nickel (Ni2+) and zinc (Zn2+) ions on an activated carbon using binary mixtures of metal and dye, and packed bed columns at different operating conditions. Design parameters of packed bed adsorption columns have been calculated using the breakthrough curves and Thomas model, and an analysis has been performed to determine the effect and magnitude of the synergistic adsorption on the design parameters and adsorbent performance. Results showed that there is a strong synergistic adsorption of heavy metals on activated carbon caused by the presence of dye AB25 in binary mixtures. The …
Critical Point Calculations Of Multi-Component Reservoir Fluids Using Nature-Inspired Metaheuristic Algorithms, Moataz N. Shehata, Seif-Eddeen K. Fateen, Adrian Bonilla-Petriciolet
Critical Point Calculations Of Multi-Component Reservoir Fluids Using Nature-Inspired Metaheuristic Algorithms, Moataz N. Shehata, Seif-Eddeen K. Fateen, Adrian Bonilla-Petriciolet
Adrian Bonilla-Petriciolet
This study introduces the application of nature-inspired metaheuristic algorithms for performing critical point calculations in multicomponent reservoir fluids. These algorithms are Monkey - Krill Herd Hybrid (MAKHA), Intelligent Firefly Algorithm (IFA), Covariance Matrix Adaptation Evolution Strategy (CMAES), Artificial Bee Colony (ABC), Cuckoo Search (CS), Bare Bones Particle Swarm Optimization (BBPSO) and Flower Pollination Algorithm (FPA). Capabilities and limitations of these optimizers have been analyzed using black oil, volatile and condensate reservoir fluids with fifty components. Results showed that BBPSO, IFA and FPA outperformed other nature-inspired methods for critical point calculations in tested fluids. In particular, BBPSO offered the best efficiency-reliability …
Inżynieria Chemiczna Lab., Wojciech M. Budzianowski
Evaluation Of Effective Operational Cycle Time And Bioprocess Parameters In A Sequential Batch Reactor For Efficient Organic And Nutrient Removal From Domestic Sewage, Sandip S. Magdum, Siva Kumar Varigala, Yogesh N. Patil, Gauri P. Minde, Janardhan B. Bornare, V. Kalyanraman
Evaluation Of Effective Operational Cycle Time And Bioprocess Parameters In A Sequential Batch Reactor For Efficient Organic And Nutrient Removal From Domestic Sewage, Sandip S. Magdum, Siva Kumar Varigala, Yogesh N. Patil, Gauri P. Minde, Janardhan B. Bornare, V. Kalyanraman
Sandip S. Magdum
Anaerobic, anoxic and aerobic environment can be simulated in the single stage sequential batch reactor (SBR) . Various design conditions viz., combinations of different phase time and different cycle time, hydraulic residence time (HRT), substrate loading rate, sludge age (SRT) and aeration time were analyzed for optimum biological treatment. The pilot runs were evaluated with the design conditions of food/microbe ratio (F/M) 0.2 per day and MLSS of 4950 mg/L. For the given design conditions 4, 5 and 6 hours cycle lengths were analyzed for their efficient performance with 30-33% of decant volume for sewage containing C:N:P of 100:8:2. Studies …
Hydrometallurgy In The Past Decades. A Personal View, Fathi Habashi
Hydrometallurgy In The Past Decades. A Personal View, Fathi Habashi
Fathi Habashi
In the 1940s hydromtallurgy benefitted a great deal from Manhattan Project in USA, then in the 1950s a new technology was introduced by Sherritt-Gordon Mines in association with the Mines Branch in Ottawa to treat ores with ammonia under pressure and to precipitate metals from solution by hydrogen under pressure. Since then hydrometallurgy has made great progress as evidenced by the number of conferences held to discuss this topic. A personal view of these developments with those involved is given.
Metallurgical Chemistry, Fathi Habashi
Metallurgical Chemistry, Fathi Habashi
Fathi Habashi
Metallurgical chemistry is the most ancient science of chemistry. It is related to the recovery of metals from ores and their refining. In its modern form, it involves separation of finely ground minerals by flotation, melting of ores, aqueous processing of ores, and the application of electric current to separate and purify metals from aqueous solution or from a fused salt. Metallurgical chemistry is closely related to the chemical industry.
Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi
Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi
Fathi Habashi
Phosphate rock of sedimentary origin contains on the average 0.01 % uranium. Since large tonnage of this rock is used annually to produce fertilizers, this represented an important potential source of uranium. Before the discovery of rich uranium deposits this source was developed on industrial scale. The production of phosphoric acid by sulfuric acid process is at present facing the problem of disposal of gypsum; about 1.5 tons of gypsum is produced per ton of rock processed. This material contains all the radium originally present in the rock which results from the radioactive decay of uranium. As a result, phospho-gypsum …
Competence Evaluation Of Mycodiesel Production By Oleaginous Fungal Strains: Mucor Circinelloides And Gliocladium Roseum, Sandip S. Magdum, Gauri P. Minde, Upendra S. Adhyapak, V. Kalyanraman
Competence Evaluation Of Mycodiesel Production By Oleaginous Fungal Strains: Mucor Circinelloides And Gliocladium Roseum, Sandip S. Magdum, Gauri P. Minde, Upendra S. Adhyapak, V. Kalyanraman
Sandip S. Magdum
Comparing with lesser algal growth rate for biofuel production along with many constraints, fungal route should be analyzed for its capability of biodiesel or mycodiesel production. The two fungal strains namely, Mucor circinelloides (MTCC1297) and Gliocladium roseum (MTCC6474) were analyzed for laboratory scale mycodiesel production. The M. circinelloides and G. roseum were able to produce biomass of 0.404 mg VSS/mg sucrose and 0.642 mg VSS/ mg sucrose with the mycodiesel content of 20.69% (w/w) and 11.37% (w/w) respectively. Furthermore, qualitative analysis of the oil contents by GC-MS were identified the presence of Tetradecanoic and Octadecanoic acids.
Design & Analysis Of Ø40” X 80” Conventional Sugar Mill Head Stock., Santosh Y. Salunkhe
Design & Analysis Of Ø40” X 80” Conventional Sugar Mill Head Stock., Santosh Y. Salunkhe
Innovative Research Publications IRP India
Sugar mill head stock play a significant role in the sugar plant as they have to sustain the forces experienced by the rollers while extracting juice from the cane. The present analysis related to modification in sugar mill head stock Ø40”X80”. This paper describes the advantages of using Ø40”X80” mill head stocks by designing & analysis by ANSYS software. In this study theoretical study has been done considering the Bending moment & force polygon diagrams. Bending moment factor which helps in finding actual results. By changing various parameters the performance of mill head stocks is studies using static structural analysis …
Sir Walter Raleigh And Tar Sands, Fathi Habashi
Sir Walter Raleigh And Tar Sands, Fathi Habashi
Fathi Habashi
Petroleum is sometimes ejected from underground to form lakes contaminated with rocks. The volatile components evaporate with time leaving behind a solid mixture known as asphalt or tar sands. Lake Asphalt in Trinidad contains about 40% bitumen. Sir Walter Raleigh (ca 1554 –1618) sailed to Trinidad in search of El Dorado but he discovered the lake instead.
Evaluation Of Sequential Batch Reactor (Sbr) Cycle Design To Observe The Advantages Of Selector Phase Biology To Achieve Maximum Nutrient Removal, Sandip S. Magdum, Siva Kumar Varigala, Gauri P. Minde, Janardhan B. Bornare, V. Kalyanraman
Evaluation Of Sequential Batch Reactor (Sbr) Cycle Design To Observe The Advantages Of Selector Phase Biology To Achieve Maximum Nutrient Removal, Sandip S. Magdum, Siva Kumar Varigala, Gauri P. Minde, Janardhan B. Bornare, V. Kalyanraman
Sandip S. Magdum
Pilot plant studies of sequential batch reactor (SBR) cycles revealed the role of selector phase biology (SPB) involved in COD removal, nitrification, denitrification and total phosphate removal. The phases namely anoxic, anaerobic and aerobic in single tank reactor design of SBR were showed effective biological nutrient removal (BNR) > 90% on average in 4 h designed cycle time with 12 h of hydraulic retention time (HRT). The phases were 2 h fill which includes 1 h simultaneous fill and aeration, 1 h settle and 1 h decant. This cycle design found effective to create selective environment for microbes to carry biological …
Generic Model Control Of Biomethanation Process, Innovative Research Publications Irp India, Ahmed S. Abd El-Hamid, Ahmed E. Hussian, Aly M. Radwan
Generic Model Control Of Biomethanation Process, Innovative Research Publications Irp India, Ahmed S. Abd El-Hamid, Ahmed E. Hussian, Aly M. Radwan
Innovative Research Publications IRP India
This paper focuses on the design of Generic Model Control (GMC) algorithm for the control of the acetate concentration in a biomethanation process with production of methane gas. A nonlinear dynamic model for the biomethanation process is used in the derivation of the control law of Generic Model Control scheme. The controller parameters are estimated using the Trial and Error method. The effectiveness and performance of the proposed control strategy is illustrated by a MATLAB program under various operation conditions and disturbances. The simulation results obtained confirmed the good quality of the control
Levenberg – Marquardt’S Algorithm Used For Pid Controller Parameters Optimization, Innovative Research Publications Irp India, Ahmed S. Abd El-Hamid, Ahmed H. Eissa, Aly M. Radwan
Levenberg – Marquardt’S Algorithm Used For Pid Controller Parameters Optimization, Innovative Research Publications Irp India, Ahmed S. Abd El-Hamid, Ahmed H. Eissa, Aly M. Radwan
Innovative Research Publications IRP India
The determination of parameters of controllers is an important problem in automatic control systems. In this paper, the Levenberg Marquardt (LM) Algorithm is used to effectively solve this problem with reasonable computational effort. The Levenberg Marquardt (LM) Algorithm for optimization of three term (PID) controller parameters with dynamic model of pH neutralization process is presented. The main goal is to show the merits of Levenberg Marquardt algorithm optimization and to determine its suitability in the area of control systems. Lastly, the application of this approach to the calculation of the parameters of PID controller shows that the Levenberg Marquardt (LM) …
Strategy For The Biotransformation Of Fermented Palm Oil Mill Effluent Into Biodegradable Polyhydroxyalkanoates By Activated Sludge
Faculty of Engineering University of Malaya
Management of wastewater by resource recovery approach allows the transformation of wastewater into valuable resources. This work examines the biotransformation of fermented palm oil mill effluent (POME) into biodegradable plastics - polyhydroxyalkanoates (PHA) - through cultivation and enrichment of PHA-accumulating organisms in activated sludge and the subsequent production of PHA by the cultivated sludge. Enrichment of PHA-accumulating organisms via aerobic dynamic feeding process was effective and had significantly enhanced the PHA storage capacity of the sludge (wt% PHA per sludge dry weight) from 4 wt% (seed sludge) to 40-64 wt% (sludge cultivated for 50 days and more). The cultivated sludge …
Significantly Improved Photocurrent Response Of Zns-Reduced Graphene Oxide Composites
Significantly Improved Photocurrent Response Of Zns-Reduced Graphene Oxide Composites
Faculty of Engineering University of Malaya
ZnS-nanoparticles (NPs) reduced graphene oxide (rGO) composites with a high degree of crystallinity and high dispersity were successfully synthesized via a facile solvothermal method in the gelatin medium, during which the formation of ZnS NPs, reduction of graphene oxide and loading of ZnS NPs into the rGO surface occur simultaneously. Gelatin, as a natural capping agent, plays a significant role in controlling the degree of dispersion and coverage of ZnS NPs. The effect of rGO on the crystalline structure and optical properties of ZnS NPs were determined via X-ray diffraction, UV-visible diffused reflectance spectroscopy and photoluminescence spectroscopy. The ZnS-rGO composites …
Experimental And Numerical Investigation Of Heat Transfer In Cnt Nanofluids
Experimental And Numerical Investigation Of Heat Transfer In Cnt Nanofluids
Faculty of Engineering University of Malaya
Nanofluids with their enhanced thermal conductivity are believed to be a promising coolant in heat transfer applications. In this study, carbon nanotube (CNT) nanofluids of 0.01wt%, stabilised by 1.0wt% gum arabic were used as a cooling liquid in a concentric tube laminar flow heat exchanger. The flow rate of cold fluid varied from 10 to 50g/s. Both experimental and numerical simulations were carried out to determine the heat transfer enhancement using CNT nanofluids. Computational fluid dynamics (CFD) simulations were carried out using Fluent v 6.3 by assuming single-phase approximation. Thermal conductivity, density and rheology of the nanofluid were also measured …
Catalyst Deactivation And Regeneration, Innovative Research Publications Irp India, Santosh Walke, Sagar Kambale
Catalyst Deactivation And Regeneration, Innovative Research Publications Irp India, Santosh Walke, Sagar Kambale
Innovative Research Publications IRP India
In this article a study about catalyst regeneration is been put forward. A study of how catalyst regeneration is done, why there is a need of regeneration and also about catalyst deactivation mainly in refinery processes. Catalyst Regeneration is widely used in many industries by in-situ or ex-situ methods as an economical beneficial technique for processes. In this article I have also shared some important test done on catalyst before they are used in a specific process. Catalyst Regeneration is mainly seen where the spent catalyst is costly
Nanonickel Catalyst Reinforced With Silicate For Methane Decomposition To Produce Hydrogen And Nanocarbon: Synthesis By Co-Precipitation Cum Modified Stöber Method, Upm Ashik, Wma Wan Daud
Nanonickel Catalyst Reinforced With Silicate For Methane Decomposition To Produce Hydrogen And Nanocarbon: Synthesis By Co-Precipitation Cum Modified Stöber Method, Upm Ashik, Wma Wan Daud
upm ashik
Co-precipitation cum modified Stöber method is a continuous process avoiding application of higher temperature treatment before supporting nanometal with SiO2, irrespective of pre-preparation methods. We have conducted the co-precipitation process without undertaking calcination under air in order to avoid even a partial particle agglomeration and hence maintained average particle size [similar]30 nm after enforcing with SiO2. This is the first report adopting such an unceasing preparation for preparing metal/silicate nanostructures. Furthermore, n-Ni/SiO2 nanostructured catalysts were used for thermocatalytic decomposition of methane to produce hydrogen and carbon nanotubes. The catalyst was found to be very stable and the methane transformation activity …
Dripping Dynamics Of Newtonian Liquids From A Tilted Nozzle
Dripping Dynamics Of Newtonian Liquids From A Tilted Nozzle
Faculty of Engineering University of Malaya
The dripping dynamics of Newtonian liquids emanating from an inclined nozzle is studied. The fluid viscosity mu flow rate Q, nozzle radius R, and inclination angle theta have been varied independently. The drop breakup times and the different modes of dripping have been identified using high speed imaging. A phase diagram showing the transition between the dripping modes for different theta is constructed in the (We, Ka) space, where We (Weber number) measures the relative importance of inertia to surface tension force and Ka (Kapitza number) measures the relative importance of viscous to surface tension forces. At low values of …
Influence Of Ultrasound Power On Acoustic Streaming And Micro-Bubbles Formations In A Low Frequency Sono-Reactor: Mathematical And 3d Computational Simulation
Faculty of Engineering University of Malaya
This paper aims at investigating the influence of ultrasound power amplitude on liquid behaviour in a low-frequency (24 kHz) sono-reactor. Three types of analysis were employed: (i) mechanical analysis of micro-bubbles formation and their activities/characteristics using mathematical modelling. (ii) Numerical analysis of acoustic streaming, fluid flow pattern, volume fraction of micro-bubbles and turbulence using 3D CFD simulation. (iii) Practical analysis of fluid flow pattern and acoustic streaming under ultrasound irradiation using Particle Image Velocimetry (Ply). In mathematical modelling, a lone micro bubble generated under power ultrasound irradiation was mechanistically analysed. Its characteristics were illustrated as a function of bubble radius, …
The Tribological And Electrochemical Behavior Of Hvof-Sprayed Cr3c2-Nicr Ceramic Coating On Carbon Steel
Faculty of Engineering University of Malaya
High Velocity Oxygen Fuel (HVOF) is an excellent approach to prepare a good, wear-resistant lamella of Chromium Carbide-Nickel Chrome (Cr3C2-NiCr) on carbon steel for high temperature application. This research investigates the effect of a thin, deposited layer of Cr3C2-NiCr on carbon steel in terms of wear and corrosion properties. The microstructure of the HVOF-sprayed Cr3C2-NiCr coating was characterized at each step by scanning electron microscopy. Wear testing was performed with a pin-on-disk tester. Wear weight loss was examined by applying different loads over a 9048.96 m sliding distance. Experimental results show that the wear resistance of the coated sample reduced …
Production Of Greenhouse Gas Free Hydrogen By Thermocatalytic Decomposition Of Methane – A Review, Upm Ashik, Wma Wan Daud, Hf Abbas
Production Of Greenhouse Gas Free Hydrogen By Thermocatalytic Decomposition Of Methane – A Review, Upm Ashik, Wma Wan Daud, Hf Abbas
upm ashik
Thermocatalytic decomposition of methane (TCD) is a fully green single step technology for producing hydrogen and nano-carbon. This review studying all development in laboratory-scale research on TCD, especially the recent advances like co-feeding effect and catalyst regeneration for augmenting the productivity of the whole process. Although a great success on the laboratory-scale has been fulfilled, TCD for greenhouse gas (GHG) free hydrogen production is still in its infancy. The need for commercialization of TCD is greater than ever in the present situation of huge GHG emission. TCD usually examined over various kind of catalysts, such as monometallic, bimetallic, trimetallic, combination …
Driving Force For Binary Alloy Solidification Under Far From Local Equilibrium Conditions, Sergey Sobolev
Driving Force For Binary Alloy Solidification Under Far From Local Equilibrium Conditions, Sergey Sobolev
Sergey Sobolev
No abstract provided.
Characterization Of Nickel-Doped Biphasic Calcium Phosphate/Graphene Nanoplatelet Composites For Biomedical Application
Faculty of Engineering University of Malaya
The effect of the addition of an ionic dopant to calcium phosphates for biomedical applications requires specific research due to the essential roles played in such processes. In the present study, the mechanical and biological properties of Ni-doped hydroxyapatite (HA) and Ni-doped HA mixed with graphene nanoplatelets (GNPs) were evaluated. Ni (3 wt.% and 6 wt.%)-doped HA was synthesized using a continuous precipitation method and calcined at 900 degrees C for 1 h. The GNP (0.5-2 wt.%)-reinforced 6% Ni-doped HA (Ni6) composite was prepared using rotary ball milling for 15 h. The sintering process was performed using hot isostatic pressing …
Kinetic And Stoichiometric Characterization For Efficient Enhanced Biological Phosphorus Removal (Ebpr) Process At High Temperatures
Faculty of Engineering University of Malaya
A recently reported stable and efficient EBPR system at high temperatures around 30 degrees C has led to characterization of kinetic and stoichiometric parameters of the Activated Sludge Model no. 2d (ASM2d). Firstly, suitable model parameters were selected by identifiability analysis. Next, the model was calibrated and validated. ASM2d was found to represent the processes well at 28 and 32 degrees C except in polyhyroxyalkanoate (PHA) accumulation of the latter. The values of the kinetic parameters for PHA storage (q(PHA)), polyphosphate storage (q(PP)) and growth (mu(PAO)) of polyphosphate-accumulating organisms (PAOs) at 28 and 32 degrees C were found to be …
Effect Of High-Energy Ball Milling On The Formation And Micro Structural Features Of Carbonated Chlorapatite Nanopowders
Faculty of Engineering University of Malaya
Carbonated chlorapatite nanopowders (n-CCAp) were synthesized by mechanochemical process from calcite (CaCO3), phosphorus pentoxide (P2O5), and calcium chloride (CaCl2) as raw materials. Results demonstrated that the formation of n-CCAp was influenced strongly by the milling time. At the beginning of milling (up to 15 min), CaCO3 and CaCl2 were the dominant phases, while P2O5 disappeared entirely due to its very high deliquescent nature. With increasing the milling time to 600 min, the progressive mechanochemical reaction was completed which resulted in the formation of nanostructured carbonated chlorapatite. According to the X-ray diffraction data, crystallite size of the product decreased from 24 …