Numerical Modeling of Phenol Adsorption on Granular Activated Carbon Fixed Bed: Comparison of Two Numerical Methods to Solve the Advection-dispersion Equation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Mounira Kolli ◽  
Safia Semra ◽  
Fatiha Benmahdi ◽  
Mohamed Bouhelassa ◽  
Michel Sardin
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Numerical Methods ◽  
Dispersion Equation ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Picard Iteration ◽  
Advection Dispersion ◽  
Newton Raphson ◽  
Runge Kutta

AbstractThis paper presents a comparison between some numerical methods and techniques for solving the nonlinear advection-dispersion equation, which may be used to describe the adsorption of phenol into a granular activated carbon fixed bed under local equilibrium conditions. The adsorption is described by the Langmuir isotherm, which makes the advection-dispersion equation nonlinear. This equation is solved successively by using the approximation and linearization techniques. For each technique, two types of numerical algorithms are used. Concerning the first one, the Implicit and the Runge Kutta schemes are used. As for the second one, the Modified Picard iteration and the Newton Raphson scheme are applied. Simulation results have been compared to each other and to the experimental data as well. Both of the Implicit and the Runge Kutta algorithms have led to superimposed simulated breakthrough curves. Both of the modified Picard and Newton Raphson schemes have given identical results too. However, comparing to the experimental data, the obtained solution, using the approximation technique, has underestimated the retardation of solute and failed in fitting the experimental breakthrough. The Obtained solution, using the linearization technique, has correctly fitted the experimental results under all the conditions of: feed flow rate, activated carbon bed height and the inlet phenol concentration.

Granular activated carbon (GAC) adsorption in tertiary wastewater treatment: experiments and models

2003 ◽  
Vol 47 (1) ◽  
pp. 113-120 ◽  
Author(s):  
D.S. Chaudhary ◽  
S. Vigneswaran ◽  
V. Jegatheesan ◽  
H.H. Ngo ◽  
H. Moon ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Developed Countries ◽  
Synthetic Wastewater ◽  
Batch Adsorption ◽  
Model Parameters ◽  
Wide Range ◽  
Gac Adsorption

Wastewater treatment has always been a major concern in the developed countries. Over the last few decades, activated carbon adsorption has gained importance as an alternative tertiary wastewater treatment and purification process. In this study, granular activated carbon (GAC) adsorption was evaluated in terms of total organic carbon (TOC) removal from low strength synthetic wastewater. This paper provides details on adsorption experiments conducted on synthetic wastewater to develop suitable adsorption isotherms. Although the inorganics used in the synthetic wastewater solution had an overall unfavourable effect on adsorption of organics, the GAC adsorption system was found to be effective in removing TOC from the wastewater. This study showed that equation of state (EOS) theory was able to fit the adsorption isotherm results more precisely than the most commonly used Freundlich isotherm. Biodegradation of the organics with time was the most crucial and important aspect of the system and it was taken into account in determining the isotherm parameters. Initial organic concentration of the wastewater was the determining factor of the model parameters, and hence the isotherm parameters were determined covering a wide range of initial organic concentrations of the wastewater. As such, the isotherm parameters derived using the EOS theory could predict the batch adsorption and fixed bed adsorption results of the multi-component system successfully. The isotherm parameters showed a significant effect on the determination of the mass transfer coefficients in batch and fixed bed systems.

Changes in Particle Size Distributions on a Fixed Bed of Granular Activated Carbon

1986 ◽  
Vol 18 (1) ◽  
pp. 31-42 ◽  
Author(s):  
E. A. Shpirt ◽  
K. T. Alben
Keyword(s):  
New York ◽  
Particle Size ◽  
Activated Carbon ◽  
Average Particle Size ◽  
Fixed Bed ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Water Treatment Plant ◽  
Average Diameter ◽  
Average Particle

The particle size distribution at different bed depths of a fixed bed of granular activated carbon (GAC) has been monitored during 50 weeks of a pilot column run at the Waterford, New York potable water treatment plant. Initial backwashing resulted in significant stratification of GAC in the column: larger particles (average diameter 1.18 mm) settled in the bottom of the column (105 cm), and smaller particles (average diameter 0.97 mm) were concentrated near the top (24 cm), compared to samples of unstratified virgin Calgon F400 (average diameter 1.09 mm). During column loading and initial backwashing, more fines were created than were present in the virgin GAC (average 6.5% of GAC fines in the > 40 mesh fraction, compared to only 0.3% in the > 40 mesh fraction for virgin Calgon F400). After 50 weeks of service there was an overall trend toward a smaller average particle size (0.9 mm) with development of a more regular pattern of bed stratification (1.08 mm at the bottom and 0.75 mm at the top). These changes are attributed to breaking of large particles (12-20 mesh) and creation of intermediate size particles (20-30 and 30-40 mesh).

Arsenic adsorption on Fe–Mn modified granular activated carbon (GAC–FeMn): batch and fixed-bed column studies

2019 ◽  
Vol 54 (3) ◽  
pp. 168-178 ◽  
Author(s):  
Jasmina Nikić ◽  
Jasmina Agbaba ◽  
Malcolm A. Watson ◽  
Aleksandra Tubić ◽  
Marko Šolić ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Column Studies ◽  
Arsenic Adsorption ◽  
Fixed Bed Column

Fixed-bed column adsorption of the coffee aroma compound benzaldehyde from aqueous solution onto granular activated carbon from coconut husk

LWT ◽  
2014 ◽  
Vol 59 (2) ◽  
pp. 1025-1032 ◽  
Author(s):  
Anderson Marcos Dias Canteli ◽  
Danielle Carpiné ◽  
Agnes de Paula Scheer ◽  
Marcos R. Mafra ◽  
Luciana Igarashi-Mafra
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Aroma Compound ◽  
Fixed Bed Column ◽  
Coconut Husk ◽  
Column Adsorption

scholarly journals Safe drinking water: effect of granular activated carbon bed characteristics on iron removal from water

2016 ◽  
Vol 18 (1) ◽  
pp. 1
Author(s):  
Md Golam Rasul ◽  
Imtiaz Ahmed ◽  
Md Iqbal Hossain
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Chemical Engineering ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Water Effect ◽  
Engineering Research ◽  
Household Water ◽  
The Individual ◽  
Water Filters

<p>Tuning the characteristics of granular activated carbon bed (GAC-bed) in household water-filters would be a technique to maintain iron at the required-level in drinking water. In the present study the individual effects of the depth of GAC-bed and the size and porosity of GAC particles on the iron removing capacity are investigated experimentally. A spectrophotometer is used to measure iron-content in water. It is observed that iron removing capacity increases monotonically with the increase in bed-depth regardless of the size of GAC particles. It is also observed that the iron removing capacity decreases drastically with the increase in the size of GAC particles for any fixed bed-depth. Finally the porosity of GAC particles is found to affect the iron removing capacity. The higher the GAC porosity the higher is the iron removing capacity over the considered porosity-range. It is believed that the observations of present study would be useful in adjusting GAC-bed characteristics at the time of designing household water-filters to maintain iron at the required-level.</p><p>Chemical Engineering Research Bulletin 18(2015) 1-5</p>

scholarly journals Experimental data for aluminum removal from aqueous solution by raw and iron-modified granular activated carbon

Data in Brief ◽  
2018 ◽  
Vol 17 ◽  
pp. 731-738 ◽  
Author(s):  
Mokhtar Mahdavi ◽  
Afshin Ebrahimi ◽  
Amir Hossein Mahvi ◽  
Ali Fatehizadeh ◽  
Farham Karakani ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Activated Carbon ◽  
Granular Activated Carbon

Simulating the performance of fixed-bed granular activated carbon adsorbers: Removal of synthetic organic chemicals in the presence of background organic matter

2005 ◽  
Vol 39 (11) ◽  
pp. 2407-2421 ◽  
Author(s):  
Michelle Edith Jarvie ◽  
David W Hand ◽  
Shanmugalingam Bhuvendralingam ◽  
John C Crittenden ◽  
Dave R Hokanson
Keyword(s):  
Organic Matter ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Organic Chemicals ◽  
Synthetic Organic Chemicals
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