Treatment of textile dyeing factory wastewater by electrocoagulation with low sludge settling time: Optimization of operating parameters by RSM

Khorram, A.; Fallah, Narges

doi:10.1016/j.jece.2017.12.054

Cited by 128 publications

(74 citation statements)

References 36 publications

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“…The quadratic polynomial equation was applied to obtain a mathematical relationship between Y (as a dependent variable) and three independent variables (A, B, C). 36,37…”

Section: Phenol Degradation Procedures and Hplc Analysismentioning

confidence: 99%

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Ehsani

Aroujalian

2019

Polymers for Advanced Techs

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The main objective of this research is to use the photocatalytic properties of PES/TiO2 nanofibers membranes to remove the phenol as a toxic pollutant in various effluents. The uniform fibers in terms of minimum bead formation and fibers diameter were fabricated. Therefore, more TiO2 catalysts are on the surface of the fibers which increase the active surface area of nanoparticles and consequently improve the phenol degradation efficiency. The effects of TiO2 concentration on hydrophilicity, mechanical properties, porosity, mean pore size, and water flux of membranes were studied. The PES/TiO2 nanofibers were evaluated for phenol degradation under UVA irradiation through a transparent membrane module. The amount of removable phenol was analyzed with high‐performance liquid chromatography. Central composite design was used as a statistical experimental design. Finally, the effect of TiO2 content in nanofibers and initial phenol concentrations were investigated as well as pH values in synthetic wastewater, on phenol degradation. The results from analysis of variance (ANOVA) analysis indicated that TiO2 content in nanofibers was the most important and effective parameter on phenol degradation. It was also presented that there is no significant interaction between parameters so that the effect of each parameter was investigated separately. Maximum phenol degradation was 43.0 ± 0.3% and found under conditions of TiO2 content, initial phenol concentration, and pH value of 8%, 120 ppm, and 7, respectively.

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“…The quadratic polynomial equation was applied to obtain a mathematical relationship between Y (as a dependent variable) and three independent variables (A, B, C). 36,37…”

Section: Phenol Degradation Procedures and Hplc Analysismentioning

confidence: 99%

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Ehsani

Aroujalian

2019

Polymers for Advanced Techs

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“…The previous study [12] revealed that a large amount of effluent to be treated exit directly to the outlet without reacting in the riser section. The goal of numerical simulation is to verify this result and find possible solutions.…”

Section: First Configuration (Oda) With Continuous Modementioning

confidence: 99%

“…The first position corresponds to the real position of the liquid outlet [12] of the reactor functioning with continuous mode. The second position corresponds to an upper position of the liquid outlet.…”

Section: First Configuration (Oda) With Continuous Modementioning

confidence: 99%

“…For this, the airlift reactors can offer this opportunity because the sludge recovery can be achieved by flotation in the disengagement section. Thus, settling time constitutes a drawback for the pollutants as mentioned by Khorram et al in their paper [12] in which even with a relatively high efficiency of color removal the settling required more time.…”

Section: Introductionmentioning

confidence: 99%

“…The liquid RTD is determined by means of the tracer response technique. The prior investigation [12] based on the residence time distribution measurements method had shown several troubles related to the liquid flow behavior. The inlet quantity is divided into two flows: one exit directly the rector by crossing the junction and the other cross the riser, the separator zone and the downcomer to exit.…”

Section: Introductionmentioning

confidence: 99%

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Computational fluid dynamic for improving design and performance of an external loop airlift reactor used in electrochemical wastewater treatment

et al. 2019

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An innovative semi pilot reactor was designed for waste water treatment. It consists of an external loop airlift reactor used as electrochemical reactor in which electrocoagulation/electroflottation was performed to treat waste water. The computational fluid dynamic consisting of multiphase Eulerian-Eulerian formulation and a structured mesh was used in order to investigate the flow in two configurations of external-loop airlift reactors: a semi pilot airlift reactor (first configuration) and an improved external loop airlift reactor (second configuration). The simulation produced the experimental results for the first configuration and highlighted the weak efficiency in the case of continuous mode of the first configuration. The improved design was proposed to realize a total flotation of sludge in both modes: batch and continuous. The goal of this study is to illustrate the influence of different parameters in the flow pattern and the average liquid velocity. Interesting results were obtained by simulation showing that the electrodes position, hydrogen production related to the current intensity and the bubble diameter are the predominant parameters influencing the flow pattern in this reactor. The simulation concerning the improved second configuration exhibits that: (1) Average liquid velocity increases when the electrodes are positioned in depth (lower position in the riser). (2) The total flotation is obtained independently of the position of the electrodes while erosion of the flocks takes place for lower position of electrodes in the case of the first configuration. This constitutes an improvement in reactor performance in the case of batch mode. (3) Average liquid velocity decreases when the bubble diameter increases. The numerical procedure and simulation can be used as tools for the design and scale-up of external loop airlift reactors. An application is then presented to show the efficiency of electrocoagulation/electroflotation in removing color for textile effluent.

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Utilization of Response Surface Methodology in Electrocoagulation for Process Optimization and Parametric Analysis

Akhtar,

Suleman,

Gillani

et al. 2023

ChemBioEng Reviews

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Electrocoagulation (EC) is a well‐recognized and feasible treatment technique for wastewater treatment. The process optimization and analysis of process parameters of EC not only aid to scale up the EC process at an industrial level but also help to explore the economic and environmental considerations to achieve higher efficiency. Response surface methodology (RSM) is a prominent chemometric approach for both process optimization and evaluation of different factors for the removal of target pollutants from wastewater. This review provides a thorough examination of notable scholarly works that focus on the use of the RSM in EC for the purpose of wastewater treatment. Furthermore, the current advancements in implementing the RSM approach not only for standalone EC processes but also for the case are described where it is being practiced as a part in the integrating system for wastewater treatment.

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Treatment of textile dyeing factory wastewater by electrocoagulation with low sludge settling time: Optimization of operating parameters by RSM

Cited by 128 publications

References 36 publications

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Computational fluid dynamic for improving design and performance of an external loop airlift reactor used in electrochemical wastewater treatment

Utilization of Response Surface Methodology in Electrocoagulation for Process Optimization and Parametric Analysis

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Treatment of textile dyeing factory wastewater by electrocoagulation with low sludge settling time: Optimization of operating parameters by RSM

Cited by 128 publications

References 36 publications

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO2) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO2) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Computational fluid dynamic for improving design and performance of an external loop airlift reactor used in electrochemical wastewater treatment

Utilization of Response Surface Methodology in Electrocoagulation for Process Optimization and Parametric Analysis

Contact Info

Product

Resources

About

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution