microfiltration membrane Articles
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Microfiltration Ceramic Membrane Element
Ceramic microfiltration membrane element is made from alumina and zirconia which is an asymmetric membrane structure with multi-channel tubular shape. The pore is on the channel. Driven by operation pressure, the liquid is running in the membrane. The part less than pore size is permeation, the part lager than pore size is concentrated liquid, so as to achieve the separation, concentration and ...
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Facile fouling resistant surface modification of microfiltration cellulose acetate membranes by using amino acid
l -DOPAA major obstacle in the widespread application of microfiltration membranes in the wet separation processes such as wastewater treatment is the decline of permeates flux as a result of fouling. This study reports on the surface modification of cellulose acetate (CA) microfiltration membrane with amino acid l-3,4-dihydroxy-phenylalanine (l-DOPA) to improve fouling resistance of the membrane. The ...
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Simulation of particle capture in a microfiltration membrane
The present study takes an interest in the description of the fouling mechanisms by a numerical approach at the microscopic scale. At first, an X-ray tomography has enabled the modelling of the membrane structure for the numerical simulations. Next, for different particle size, a same volume of particles has been sent in the modelled membrane and the final permeability has been computed. Thus, ...
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Influence of buoyant media on particle layer dynamics in microfiltration membranes
This study forms a part of the physical study of the membrane bioreactor in presence of buoyancy media. Kaolin clay suspension with buoyancy media (anthracite) was used as a suspension and the particle layer development on membrane surface with evolution of time was studied. Presence of buoyancy media reduced the pressure development by almost two folds compared to in absence of the media. The ...
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VSEP filters phosphate products, adding value while improving efficiency
A unique membrane filtration system can be used for processing of Phosphoric Fertilizer products. The system is manufactured by New Logic, of Emeryville California The V✧SEP (Vibratory Shear Enhanced Process) system uses a Microfiltration membrane module with special construction for service with high temperature. The use of high temperature vibrating polymeric membranes has significant ...
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Emerging technologies, integration with proven processes, and the challenges they represent
This paper will focus on integration of a new, emerging technology with the old, proven methods to affect a hybrid process. By doing so, the net effect is often a cost-effective compromise and a relatively painless solution to otherwise difficult problems. The concept is simple, but mixing the new with the old is not without risks. We shall also examine the pitfalls of bringing a metal recovery ...
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Comparative study on treatment of kitchen-sink wastewater using single and multichannel ceramic membrane
A comparative study was conducted to explore the potential of ceramic microfiltration membrane alone and in combination with different physicochemical treatments, viz. biotreatment and adsorption using kitchen-sink wastewater. Cross-flow microfiltration (CMF) studies were carried out with tubular ceramic membrane in single channel and multichannel configuration. Biotreatment was studied using ...
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A hybrid flotation: microfiltration cell for effluent treatment
The investigated hybrid cell combines the advantages of both flotation and membrane filtration, while overcoming their limitations and having as outcome clean water from wastewater. The specific objective of the current paper was to apply the process for the efficient separation of effluents containing toxic metals (zinc cations and chromate anions). The main examined parameters were the sorbent ...
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Treatment of landfill leachate by hybrid precipitation/microfiltration/nanofiltration process
This paper describes a promising method to treat stabilized landfill leachate. Such method consists of a combination of chemical precipitation processes, a cost-effective technique with high potential to remove contaminants with foulant nature, microfiltration aimed at removing the produced precipitate and nanofiltration (NF) for final polishing. This study was carried out on a bench unit ...
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Respirometric assays of two different MBR (microfiltration and ultrafiltration) to obtain kinetic and stoichiometric parameters
A comparison of two different medium scale MBRs (ultrafiltration and microfiltration) using respirometric methods has been achieved. The ultrafiltration membrane plant (0.034 µm pore size) maintained recirculation sludge flow at seven times the influent flow, and membranes were backwashed every 5 min and chemically cleaned weekly. The microfiltration membrane plant (0.4 µm pore size) maintained ...
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Biosorbent-assisted ceramic microfiltration process for treatment of herbal pharmaceutical wastewater with high organic loading
The feasibility of treating herbal pharmaceutical wastewater with high Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) values was studied using ceramic microfiltration membrane in combination with an adsorptive treatment. Batch kinetic and isotherm studies were carried out under varying dosages of a biosorbent prepared from the roots of Eichhornia crassipes (ECR). Adsorption ...
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Membrane foulants and fouling mechanisms in microfiltration and ultrafiltration of an activated sludge effluent
Membrane fouling in microfiltration (MF) and ultrafiltration (UF) of an activated sludge (AS) effluent was investigated. It was found that the major membrane foulants were polysaccharides, proteins, polysaccharide-like and protein-like materials and humic substances. MF fouling by the raw effluent was governed by pore adsorption of particles smaller than the pores during the first 30 minutes of ...
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Effect of sludge retention time on membrane bio-fouling using different type and pore size of membranes in a submerged membrane bioreactor
The objective of this study was to investigate the influence of sludge retention time (SRT) on membrane bio-fouling. An activated sludge reactor was operated at three different SRTs (10, 30, and 50 days). Submerged membrane experiments were performed when the mixed liquor suspended solids (MLSS) concentration reached the steady state conditions. MLSS concentrations reached the steady state at ...
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Mullite ceramic membranes for industrial oily wastewater treatment: experimental and neural network modeling
In this paper, results of an experimental and modeling of separation of oil from industrial oily wastewaters (desalter unit effluent of Seraje, Ghom gas wells, Iran) with mullite ceramic membranes are presented. Mullite microfiltration symmetric membranes were synthesized from kaolin clay and α-alumina powder. The results show that the mullite ceramic membrane has a high total organic carbon and ...
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Comparing environmental impacts of tertiary wastewater treatment technologies for advanced phosphorus removal and disinfection with life cycle assessment
Different technologies for tertiary wastewater treatment are compared in their environmental impacts with life cycle assessment (LCA). Targeting very low phosphorus concentration (50–120 μg/L) and seasonal disinfection of wastewater treatment plant (WWTP) secondary effluent, this LCA compares high-rate sedimentation, microsieve, dual media filtration (all with UV disinfection), ...
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Effect of organic fouling on micro-pollutant rejection in membrane bioreactor treating municipal solid waste landfill leachate
Effect of membrane fouling on the removal of micro-pollutants from municipal solid waste landfill leachate, i.e. 4-methyl-2,6-di-tert-butylphenol (BHT), bisphenol A (BPA), and bis(2-ethylhexyl)phthalate (DEHP), in membrane bioreactor (MBR) was investigated. Modifications of membrane surface properties were analyzed to determine their relationship with their removals. Membrane fouling was ...
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Fouling of a microfiltration membrane by humic-like substances: a mathematical approach to modelling permeate flux and membrane retention
Membrane retention of the humic-like substances present in a soluble microbial products (SMP) suspension was studied by using a dead-end filtration system. The SMP suspension was extracted from the sludge of an enhanced biological phosphorus removal-membrane bioreactor. Our results showed that both adsorption and steric retention of the humic-like substances governed their transport through ...
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Biological wastewater treatment followed by physicochemical treatment for the removal of fluorinated surfactants
Perfluorinated surfactants (PFS) have become compounds of high concern during the last decade. While “conventional surfactants” are degraded to a great extent in the biological wastewater treatment process, partly or perfluorinated surfactants are not only stable against biodegradation but also against oxidizing agents, they even resist OH-radical attacks. Our objectives were to eliminate the ...
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The recovery of copper from a copper mine effluent in a hybrid flotation/microfiltration cell
A new hybrid process for cleaning wastewater, combining flotation and membrane microfiltration, was investigated. The hybrid process combined the advantages of both flotation and membrane separation: the flotation cell removed a large proportion of suspended solid particles, while the membrane module produced clean water permeate effluent. The hybrid cell performance has been studied in depth and ...
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Analyzing the spatial and temporal characteristics of membrane fouling
Fouling characteristics of crossflow flat-sheet membranes for two Nanofiltration (NF), one Ultrafiltration (UF), and one Microfiltration (MF) membranes were analyzed using 12.5 parts per million (mg/L) FeCl3 solution and 350 mg/L copper nanofluid. FeCl3 solution represents dissolved contaminant whereas copper nanofluid simulates particulate contaminant. The spatial and temporal fouling ...
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