scholarly journals Microfiltration of wheat starch suspensions using multichannel ceramic membrane

2011 ◽  
Vol 65 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Bojana Ikonic ◽  
Zoltan Zavargo ◽  
Aleksandar Jokic ◽  
Zita Seres ◽  
Gyula Vatai ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Pore Size ◽  
Response Surface ◽  
Process Parameters ◽  
Flow Rate ◽  
Ceramic Membrane ◽  
Wheat Starch ◽  
Transmembrane Pressure ◽  
Permeate Flux ◽  
Flux Decline

This work investigates influence of different process parameters such as transmembrane pressure, flow rate and concentration of wheat starch suspension on the average permeate flux and permeate flux decline. Used membrane in all experiments was 19 channels ceramic membrane with 0.2 ?m pore size. Experimental results were analyzed using response surface methodology. It is observed that the significant average permeate flux enhancement of 200% was achieved by the increase of the transmembrane pressure, while the increase of flow rate and concentration affected the increase in average permeate flux in the range of 40-100%. Permeate flux decline was almost independent of the transmembrane pressure, but the increase of the flow rate, as well as the decrease of the concentration led to decrease of permeate flux decline in the range of 20-50%.

scholarly journals Flux intensification during microfiltration of distillery stillage using a kenics static mixer

2017 ◽  
pp. 285-293
Author(s):  
Vesna Vasic ◽  
Aleksandar Jokic ◽  
Marina Sciban ◽  
Jelena Prodanovic ◽  
Jelena Dodic ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Flow Rate ◽  
Specific Energy Consumption ◽  
Point Of View ◽  
Transmembrane Pressure ◽  
Feed Flow Rate ◽  
Static Mixer ◽  
Economic Point ◽  
Mathematical Presentation

The present work studies the effect of operating parameters (pH, feed flow rate, and transmembrane pressure) on microfiltration of distillery stillage. Experiments were conducted in the presence of a Kenics static mixer as a turbulence promoter, and its influence on the flux improvement and specific energy consumption was examined. Response surface methodology was used to investigate the effect of selected factors on microfiltration performances. The results showed that response surface methodology is an appropriate model for mathematical presentation of the process. It was found that the use of a static mixer is justified at the feed flow rates higher than 100 L/h. In contrast, the use of a static mixer at low values of feed flow rate and transmembrane pressure has no justification from an economic point of view.

scholarly journals Optimization of the flux values in multichannel ceramic membrane microfiltration of Baker`s yeast suspension

2016 ◽  
pp. 231-240
Author(s):  
Nemanja Milovic ◽  
Aleksandar Jokic ◽  
Natasa Lukic ◽  
Jovana Grahovac ◽  
Jelena Dodic ◽  
...  
Keyword(s):  
Ceramic Membrane ◽  
Transmembrane Pressure ◽  
Operating Parameters ◽  
Permeate Flux ◽  
Yeast Suspension ◽  
Initial Concentration ◽  
Suspension Concentration ◽  
Flux Decline ◽  
Initial Suspension ◽  
Average Flux

The objective of this work was to estimate the effects of the operating parameters on the baker's yeast microfiltration through multichannel ceramic membrane. The selected parameters were transmembrane pressure, suspension feed flow, and initial suspension concentration. In order to investigate the influence and interaction effects of these parameters on the microfiltration operation, two responses have been chosen: average permeate flux and flux decline. The Box-Behnken experimental design and response surface methodology was used for result processing and process optimization. According to the obtained results, the most important parameter influencing permeate flux during microfiltration is the initial suspension concentration. The maximum average flux value was achieved at an initial concentration of 0.1 g/L, pressure around 1.25 bars and a flow rate at 16 L/h.

scholarly journals Modeling and Optimization of Gas Sparging-Assisted Bacterial Cultivation Broth Microfiltration by Response Surface Methodology and Genetic Algorithm

Membranes ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 681
Author(s):  
Aleksandar Jokić ◽  
Ivana Pajčin ◽  
Nataša Lukić ◽  
Vanja Vlajkov ◽  
Arpad Kiralj ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Membrane Fouling ◽  
Specific Energy Consumption ◽  
Downstream Processing ◽  
Transmembrane Pressure ◽  
Air Sparging ◽  
Permeate Flux ◽  
Cultivation Broth

Production of highly efficient biomass-based microbial biopesticides significantly depends on downstream processing in terms of obtaining as high concentration of viable cells as possible. Microfiltration is one of the recommended operations for microbial biomass separation, but its main limitation is permeate flux decrease due to the membrane fouling. The effect of air sparging as a hydrodynamic technique for improvement of permeate flux during microfiltration of Bacillus velezensis cultivation broth was investigated. Modeling of the microfiltration was performed using the response surface methodology, while desirability function approach and genetic algorithm were applied for optimization, i.e., maximization of permeate flux and minimization of specific energy consumption. The results have revealed antagonistic relationship between the investigated dependent variables. The optimized values of superficial feed velocity and transmembrane pressure were close to the mean values of the investigated value ranges (0.68 bar and 0.96 m/s, respectively), while the optimized value of superficial air velocity had a more narrow distribution around 0.25 m/s. The results of this study have revealed a significant improvement of microfiltration performance by applying air sparging, thus this flux improvement method should be further investigated in downstream processing of different bacterial cultivation broths.

scholarly journals Prediction of maximum permeate flux (%) of disc membrane using response surface methodology (RSM)

2019 ◽  
Vol 46 (4) ◽  
pp. 299-307 ◽  
Author(s):  
Anirban Banik ◽  
Suman Dutta ◽  
Tarun Kanti Bandyopadhyay ◽  
Sushant Kumar Biswal
Keyword(s):  
Response Surface Methodology ◽  
Pore Size ◽  
Response Surface ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Operating Pressure ◽  
Permeate Flux ◽  
Feed Velocity ◽  
Disc Membrane ◽  
Influencing Parameters

The paper investigates increasing permeate flux (%) of the disc membrane which can improve the quality of rubber industrial effluent of Tripura. Response surface methodology was used to optimize the independent influencing parameters to improve the permeate flux. The effect of different influencing parameters like operating pressure, membrane pore size, and inlet feed velocity on membrane permeate flux were studied to determine the optimum operating conditions within the predefined boundary. The experiments were pre-planned and designed according to central composite rotatable design, and second-order polynomial regression model was developed for regression and analysis of variance study. Results show the membrane has maximum permeate flux (%) when the operating pressure is 14.50 Pa, pore size is 0.20 μm, and inlet feed velocity is 2.10 m/s. The Pareto analysis in the study established that the inlet velocity was the most influential parameter in the model equation.

scholarly journals Prediction of Optimum Weld Tensile Strength Using Response Surface Methodology

2021 ◽  
Vol 6 (3) ◽  
pp. 81-84
Author(s):  
C. E. Etin-Osa ◽  
L. M. Ebhota
Keyword(s):  
Tensile Strength ◽  
Response Surface Methodology ◽  
Mild Steel ◽  
Tensile Test ◽  
Response Surface ◽  
Process Parameters ◽  
Flow Rate ◽  
Gas Flow ◽  
Experimental Result ◽  
Gas Flow Rate

Metals are often subjected to various types of stresses, usually under tensile stress, quick failure of material can be encouraged especially when poor combinations of process parameters are employed in joining of the material. Tensile strength is regarded as the maximum stress that a material can sustain under tension. The aim of this study is to predict the weld tensile strength of tungsten inert gas (TIG) mild steel welds using Response Surface Methodology (RSM), with the purpose of achieving optimum results. The input parameters considered were current, voltage, and gas flow rate. The TIG welding process was used to join two pieces of mild steel plates, after which tensile test was conducted on the specimen. The experimental result was analyzed using the RSM. Weld Tensile test of 596.218MPa with a desirability value of 95.70% was observed to be the best, resulting from the optimized process parameters of current of 120.00 Amp, voltage of 20.00 volt and gas flow rate of 12.00 L/min.

Fabrication, performance evaluation, and optimisation of adsorptive ammonia removal using hollow fibre ceramic membrane: Response surface methodology approach

2021 ◽  
Vol 316 ◽  
pp. 110932
Author(s):  
Mohd Ridhwan Adam ◽  
Mohd Hafiz Dzarfan Othman ◽  
Siti Hamimah Sheikh Abdul Kadir ◽  
Mohd Hafiz Puteh ◽  
Mohd Riduan Jamalludin ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Performance Evaluation ◽  
Response Surface ◽  
Ceramic Membrane ◽  
Hollow Fibre ◽  
Ammonia Removal

Influence of Transmembrane Pressure on Microfiltration of Suspensions

2013 ◽  
Vol 788 ◽  
pp. 152-155
Author(s):  
Tomáš Bakalár ◽  
Milan Búgel ◽  
Henrieta Pavolová ◽  
Gabriel Müller
Keyword(s):  
Experimental Data ◽  
Ceramic Membrane ◽  
Single Channel ◽  
Transmembrane Pressure ◽  
Permeate Flux ◽  
Natural Sorbent ◽  
Styrene Divinylbenzene

The influence of transmembrane pressure on the permeate flux, and the critical and limiting fluxes in microfiltration of two sorbents Bentonite a natural sorbent, montmorillonite based clay and Lewatit S1468 a synthetic sorbent, styrene-divinylbenzene based copolymer were studied. An asymmetric single-channel inorganic ceramic membrane based on α-Al2O3 was used. The experimental data were obtained by continuous microfiltration equipment. According to the results the limiting flux ranged from 37 to 70 l.m-2.h-1 for Bentonite suspensions. It was not possible to estimate the limiting flux for Lewatit S1468 suspension.

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