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Disinfecting E.coli Bacteria In Drinking Water Using A Novel Fluidized Bed Reactor.
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Mohammad F Kabir
Veröffentlicht/Copyright:
25. September 2003
Abstract
Disinfecting microorganisms such as E.coli is a great concern in drinking water supply facilities around the world. Photocatalysis became an attractive technology to disinfect microorganisms due to its ability to degrade very low concentration of microorganisms without producing any harmful by-products. The use of optical fibre mesh reactors and slurry type photocatalytic reactors has been investigated by researchers around the world. It was shown that such reactors have low potential to be scaled up. An annular type fluidized bed reactor has been constructed and tested to disinfect E.coli bacteria. A specially prepared catalyst (TiO2 + Glass Bead + Zeolite) was used for this purpose. The proposed catalyst offered better degradation of E.coli compared to existing technology. Fluidization enhances the degradation of E-coli by moving the catalyst particles to the illuminated zone. E.coli degradation is tested in a similar arrangement in small scale with 100cm3 of contaminated water with the 106 E-coli/cm3. Repeated experiments were done with/without the presence of catalyst along with UV irradiation. With the presence of catalyst in the fluidized condition, the E-coli count is reduced to only 100/cm3 whereas the E-coli count after 30 minutes of UV irradiation only became 1800/cm3. The efficiency of E.coli removal is increased to 99.99% from 99.82% by using the proposed technology. Results of small scale prompted a construction of a pilot plant scale reactor and effectiveness of this reactor is being tested. Use of supported catalyst and the effective illumination of catalyst by fluidization help faster disinfection of microorganisms by this reactor. It has been found that the pilot scale is capable of degrading 84% of E.coli within 80minutes compared with 77.3% by using UV only which has capacity of handling 46 litre/min. E.coli degradation in larger scale is being tested for the first time and its result compared with only UV destruction is promising. The potential to use this method on a continuous reactor increases the potential for scale up.
Published Online: 2003-09-25
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Artikel in diesem Heft
- Review
- Applications of Liquid-Solid Fluidization
- Applications of the Non-Dominated Sorting Genetic Algorithm (NSGA) in Chemical Reaction Engineering
- Transport and Reaction Processes in Bioremediation of Organic Contaminants. 1. Review of Bacterial Degradation and Transport
- Catalysis Engineering on Three Levels
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- Recent Research in Catalytic Inorganic Membrane Reactors
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- Article
- Numerical Convection Algorithms and Their Role in Eulerian CFD Reactor Simulations
- Modeling of Autothermal Steam Methane Reforming in a Fluidized Bed Membrane Reactor
- Application of Computational Fluid Dynamics to Multiphase Flow in Bubble Columns
- Modeling of the Catalytic Distillation Process for the Synthesis of Ethyl Cellosolve Using A Three-Phase Nonequilibrium Model
- CFD Simulations of Gas Fluidized Beds Using Alternative Eulerian-Eulerian Modelling Approaches
- Diffusion Resistances and Contribution of Surface Diffusion in TAME and TAEE Production Using Amberlyst-15
- Kinetic Evaluation of Carbon Formation in Steam/CO2-Natural Gas Reformers. Influence of the Catalyst Activity and Alkalinity
- Valorization of Polyolefin/LCO Blend over HZSM-5 Zeolites
- Modeling of Membrane Reactor
- Chemical Kinetics in Dispersed-Phase Reactors
- Influence of the Sulfur Poisoning on the Performance of a Primary Steam Reformer
- Performance Enhancement of Photocatalytic Reactor Utilizing Flow Instability
- Optimization of Styrene Reactor Design for Two Objectives using a Genetic Algorithm
- Market Demand versus Technological Development: the Future of Chemical Engineering
- Influence of Particle Properties on the Yield and Selectivity of Fast Heterogeneously Catalyzed Gas-Liquid Reactions
- Estimation of Cumene Cracking Reaction-Diffusion Model Parameters: Uniqueness and Parametric Sensitivity Analysis
- A Real Time Toxicity Bioassay for Activated Sludge Reactor
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- Bubble Size Reduction in a Fluidized Bed by Electric Fields
- CFD Simulation of Reaction and Heat Transfer Near the Wall of a Fixed Bed
- Memory Based Local Learning: Application to Process Engineering Problems
- Phenomenology of NOx Adsorber Catalysts
- Optimization of Steam Reformers: Heat Flux Distribution and Carbon Formation
- Numerical Study of the Influence of Horizontal Tube Banks on the Hydrodynamics of a Dense Gas-Solid Bubbling Fluidized Bed
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- Eulerian/Eulerian CFD Simulation of a Cold Flowing FCC Riser
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- Combating Deactivation in Methane Non-Oxidative Dehydrocyclization via Hydrogen Feed Pulsing
- Photobioreactor Stability by Phase Plane Technique Applied to Spirulina Maxima Growth
- Measurement of Efficiency of Distribution of Liquid Feed in a Gas-Solid Fluidized Bed Reactor
- Adsorption Competition Effects in Hydroconversion of Alkane Mixtures on Zeolites
- Low-Carbon Monoxide Hydrogen by Sorption-Enhanced Reaction
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- Numerical Analysis of a Reacting Gas/Solid Flow in the Riser Section of an Industrial Fluid Catalytic Cracking Unit
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- Reactive Hydrogen Content: A Tool to Predict FCC Yields
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- Modeling Fluid Catalytic Cracking in a Novel CREC Riser Simulator: Adsorption Parameters under Reaction Conditions
- Hydrodynamic Modeling of CFB Risers and Downers
- The CREC Fluidized Riser Simulator. Characterization of Mixing Patterns
- Use of Different Numerical Solution Approaches for a Three-Phase Slurry Catalytic Reactor Model
- Modelling of a Reverse Flow Catalytic Membrane Reactor for the Partial Oxidation of Methane
- Analysis of the Microscopic Flow Structure of a CFB Downer Reactor Using Solids Concentration Signals
- Digital X-ray Imaging Technique to Study the Horizontal Injection of Gas-Liquid Jets into Fluidized Beds
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- Modelling of Fluidized Bed Reactors
- Short Communication or Note
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- Theoretical Analysis of Fluidized-Bed Reactor for Dimethyl Ether Synthesis from Syngas
- Gas Holdup Characteristics in a Tapered Bubble Column
- Catalytic Wet Oxidation of Acrylic Acid: Studies with Manganese-based Oxides
- Kinetics of Synthesis of Perfumery Grade p-tert-Butylcyclohexyl Acetate Over Ion Exchange Resin Catalyst
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