Modeling and Optimization of Operating Parameters for Removal of Acid Red35 Dye from Reconstituted Waste Water by Electrocoagulation in an Internal Loop Airlift Reactor Using the Experimental Design

2019 ◽  
pp. 45-60
Author(s):  
N. Azeroual ◽  
A. Dani ◽  
B. Bejjany ◽  
H. Mellouk ◽  
K. Digua
Keyword(s):  
Waste Water ◽  
Experimental Design ◽  
Airlift Reactor ◽  
Operating Parameters ◽  
Modeling And Optimization ◽  
Internal Loop

Modeling and optimization of sand crushing plant using experimental design methodology

2019 ◽  
Vol 16 (4) ◽  
pp. 487-496
Author(s):  
Djamel Benyessad ◽  
Hamid Arkoub ◽  
Abdelghani Seghir
Keyword(s):  
Mathematical Model ◽  
Experimental Design ◽  
Design Methodology ◽  
Operating Conditions ◽  
Experimental Program ◽  
Operating Parameters ◽  
Content Type ◽  
Modeling And Optimization ◽  
Crushing Plant

Purpose The purpose of this paper is to present results of an experimental program conducted on manufacturing process of crushed sand. The aim of the research is to propose an optimized approach which allows to fix, directly at the process stage, the rate of fines in the produced crushed sand. Design/methodology/approach In the first step of the study, samples of crushed sand are collected in situ, at each adjustment of the identified operating parameters. They are then analyzed in laboratory to retrieve especially the fines contents for each adjustment. These adjustments are conducted for all possible combinations of the extremum operating conditions of the parameters. In the second step of the study, the experimental design technique is applied to study the influence of the different factors, and to model the interaction between them. An expression is obtained and subjected to statistical tests, and then it is confronted to other experimental measures. Findings Parameters influencing the fines rates are identified and their effects are analyzed. The domain of variation of three predominant parameters is defined allowing to conduct in situ experiments with minimal incidence on the manufacturing disturbance. A mathematical model is proposed to quantify the crushed sand fines by analytical expression that takes into account the interaction between influencing parameters. Practical implications The conducted experiments provided new data that will help to enhance and to better set up the settings of the parameters influencing the rate of filler. The proposed expression constitutes a practical tool for the manufacturer to fix the operating parameters values that results in a desired target fines contents. Originality/value Modeling and optimization of the sand crushing plant, considered here as a case study, has not been attempted previously. The conducted experiments and the proposed mathematical model constitute an original work of this study.

scholarly journals Modeling and optimization of experimental parameters in the treatment of effluents by coagulation-flocculation processes: Methodology of experimental design

2018 ◽  
Vol 7 (3) ◽  
pp. 183-197 ◽  
Author(s):  
Hanane hanane Arroub ◽  
Ahmed El Harfi
Keyword(s):  
Experimental Design ◽  
Operating Parameters ◽  
Optimal Conditions ◽  
Operational Parameters ◽  
Modeling And Optimization ◽  
Experimental Parameters

The objective of this study is to determine the optimal conditions of the operational parameters: type of flocculant (chitosan(s) and ferrocryl®8723), dose of flocculant (0.1g/L at 0.5g/L) and pH (6 to 9) in the treatment of hot dip galvanizing effluents using coagulation/flocculation processes. The optimization of these parameters is done by the methodology of experimental design which allowed us to predict the optimal conditions. The concerned results, especially the theoretical operating parameters, allowed us to give a better reduction of the TSS, BOD5 and COD in the optimal conditions namely: the pH of about 9, the type of flocculant is chitosan(s) with a dose of 0.2g/L.

Influence of biomass on hydrodynamics of an internal loop airlift reactor

2006 ◽  
Vol 60 (6) ◽  
Author(s):  
M. Juraščík ◽  
M. Hucík ◽  
I. Sikula ◽  
J. Annus ◽  
J. Markoš
Keyword(s):  
Aspergillus Niger ◽  
Gluconic Acid ◽  
Solid Phase ◽  
Biomass Concentration ◽  
Airlift Reactor ◽  
Phase System ◽  
Two Phase ◽  
Experimental Conditions ◽  
Internal Loop ◽  
Three Phase

AbstractThe effect of the biomass presence on the overall circulation velocity, the linear velocities both in the riser and the downcomer and the overall gas hold-up was studied in a three-phase internal loop airlift reactor (ILALR). The measured data were compared with those obtained using a two-phase system (air—water). All experiments were carried out in a 40 dm3 ILALR at six different biomass concentrations (ranging from 0 g dm−3 to 7.5 g dm−3), at a temperature of 30°C, under atmospheric pressure. Air and water were used as the gas and liquid model media, respectively. Pellets of Aspergillus niger produced during the fermentation of glucose to gluconic acid in the ILALR were considered solid phase. In addition, liquid velocities were measured during the fermentation of glucose to gluconic acid using Aspergillus niger. All measurements were performed in a bubble circulation regime. At given experimental conditions the effect of the biomass on the circulation velocities in the ILALR was negligible. However, increasing of the biomass concentration led to lower values of the total gas hold-up.

scholarly journals Continuous Neutralization of NaOH Solution with CO 2 in an Internal‐Loop Airlift Reactor

2020 ◽  
Vol 44 (1) ◽  
pp. 38-47
Author(s):  
Thomas Pichler ◽  
Bernd Stoppacher ◽  
Alexander Kaufmann ◽  
Matthäus Siebenhofer ◽  
Marlene Kienberger
Keyword(s):  
Airlift Reactor ◽  
Internal Loop ◽  
Naoh Solution

Bubble recirculation regimes in an internal-loop airlift reactor

1999 ◽  
Vol 54 (18) ◽  
pp. 3995-4006 ◽  
Author(s):  
W.A.J. van Benthum ◽  
R.G.J.M. van der Lans ◽  
M.C.M. van Loosdrecht ◽  
J.J. Heijnen
Keyword(s):  
Airlift Reactor ◽  
Internal Loop
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