membrane performance Articles
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The effect of wastewater pretreatment on nanofiltration membrane performance
Membrane fouling is considered a serious obstacle for operation and cost efficiency in wastewater treatment using nanofiltration (NF). However, pretreatment is the most practical way to reduce this prior to NF. In this research, two types of wastewaters were pretreated with different methods prior to NF to examine the effect of pretreatment on membrane fouling in terms of turbidity, chemical ...
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Study of cyanide wastewater treatment by dispersion supported liquid membrane using trioctylamine and kerosene as liquid membrane
A certain amount of cyanide is present in wastewater of various industrial processes, such as wet extraction of gold, coal processing, electroplating and other industries. In this work, an experimental study regarding transport of cyanide through a dispersion supported liquid membrane was performed. A model was established to describe the reaction and transport of CN(I) in the supported liquid ...
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Continuous bioelectricity production and sustainable wastewater treatment in a microbial fuel cell constructed with non-catalyzed granular graphite electrodes and permeable membrane
Oxygen has been so far addressed as the most preferable terminal electron acceptor in the cathodes of microbial fuel cells (MFCs). However, to reduce the oxygen reduction overpotential at the cathode surface, eco-unfriendly and costly catalysts have been commonly employed. Here, we pursued the possibility of using a high surface area electrode to reduce the cathodic reaction overpotential rather ...
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Evaluation of the low pressure RO and NF membranes for an alternative tyreatment of Buyukcekmece Lake
The recent development of new generation LPRO and LPNF membranes has received attention for application in the field of wastewater and water treatment through an increasingly stringent regulation for drinking water purposes and water reclamation. This paper presents the pilot scale membrane separation studies on Buyukcekmece Lake in Istanbul with low pressure reverse osmosis (LPRO) and low ...
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STRO Leachate Treatment Membrane
ST membrane technology is a new structural membrane module specially developed for leachate and high salt wastewater treatment, which adopts spiral membrane structure, and the membrane adopts industrial anti-pollution RO membrane or NF membrane, and the grid channel adopts parallel grid structure which is different from the general spiral membrane, so that it can be used for long-term stable ...
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Synthetic organic polymer fouling in municipal wastewater reuse reverse osmosis
A full scale waste water reuse plant suffered from irreversible fouling of the reverse osmosis (RO) membranes. The major suspect of fouling is cationic organic polymers applied in the wastewater sludge treatment. Thus, the purpose of this research is to study the effect of six cationic polymers, applied in the plant, on RO membrane performance. The filtration and adsorption experiments with 4 ...
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Preparation and characterization of fouling-resistant photocatalytic metal membrane embedded with self-organized TiO2 nano tube
A self-organized nano-structured, photocatalytic TiO2 membrane with large surface area of anatase crystallites was successfully fabricated by anodization. The nano-structured anodized TiO2 membrane was characterized using SEM, XRD and TEM techniques and the operational parameters to fabricate such as anodization time and applied anodic potential were also investigated. The anodized TiO2 membrane ...
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Effect of membrane characteristics on the performance of membrane bioreactors for oily wastewater treatment
Influence of membrane material and pore size on the performance of a submerged membrane bioreactor (sMBR) for oily wastewater treatment was investigated. The sMBR had a working volume of about 19 L with flat sheet modules at the same hydrodynamic conditions. Five types of micro- and ultra-polymeric membranes containing cellulose acetate (CA), cellulose nitrate (CN), polyamide (PA), polyvinylidene ...
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Real-time monitoring of membrane bioreactors with 2D-fluorescence data and statistically based models
The application of membrane bioreactors (MBR) for wastewater treatment is growing worldwide due to their compactness and high effluent quality. However, membrane fouling, mostly associated to biological products, can reduce MBR performance. Therefore, it is important to monitor MBRs as close to real-time as possible to accelerate control actions for maximal biological and membrane performance. ...
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VSEP provides crystal clear permeate and recovers precious metals from the mining leachate at 97% recovery
A unique membrane filtration system, known as V✧SEP (Vibratory Shear Enhanced Process), was developed by New Logic of Emeryville, California. The technology employs vibrational oscillation of an advanced polymeric membrane to improve the throughput and to prevent colloidal fouling of the membrane surface. This new technology provides a innovative and cost effective method of recovering ...
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Optical Coherence Tomography
Looking inside membrane fouling with optical coherence tomography (OCT) Internal Imaging in Real-time Optical coherence tomography (OCT) is an imaging technique that uses light scattering to show cross-sections of a 3D object (1). OCT has a resolution between 1 - 15 µm, which is about two orders of magnitude finer than traditional ultrasound (2). While this technique was originally ...
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Difference between hollow fiber and flat sheet membrane
Hollow fiber and flat sheet membranes are two commonly used configurations in membrane filtration processes. They differ in their physical structure, mode of operation, and application. Here are the key differences between hollow fiber and flat sheet membranes: 1. Physical Structure: Hollow Fiber Membranes: As the name suggests, hollow fiber membranes consist of small, cylindrical fibers with ...
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Comparative study on membrane fouling between membrane-coupled moving bed biofilm reactor and conventional membrane bioreactor for municipal wastewater treatment
This study compared the performance between membrane-coupled moving bed biofilm reactor (M-MBBR) and a conventional membrane bioreactor (MBR) in parallel. Extensive tests were conducted in three pilot-scale experimental units over 6 months. Emphasis was placed on the factors that would affect the performance of membrane filtration. The results showed that the concentrations of soluble microbial ...
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Tabas coal preparation plant wastewater treatment with membrane technology
The goal of the present work is the Tabas coal preparation plant wastewater treatment using membrane technology. Polyacrylonitrile membrane was prepared through phase inversion method and then developed by annealing process. Also, high fouling resistance membranes were prepared by the embedding of TiO2 nanoparticles using self-assembling and blending methods. The effect of immersion time and ...
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Separating micro pollutants by an innovative membrane process.
Combined adsorption of micro pollutants on activated carbon and membrane filtration of MICRODYN-NADIR has proven an alternative to the established activated carbon/precipitation/sand filtration process. Contamination of the environment by micro pollutants has clearly been proved by now. Due to the high concentration of microorganisms and the contamination by antibiotics coming from animal ...
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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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Comparative study on performance of yeast and bacterial membrane bioreactors for high salinity wastewater treatment
Two laboratory-scale membrane bioreactor systems were investigated to treat high saline wastewater containing 1,000 mg/L COD and 32 g/L NaCl, namely: the yeast membrane bioreactor (YMBR) and the bacterial membrane bioreactor (BMBR). COD removal of both processes was above 90% at a hydraulic retention time (HRT) of 5 hours (volumetric loading of 5 kg COD/m³.d), sludge retention time (SRT) of 50 ...
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Membrane fouling reduction in a cost-effective integrated system of microbial fuel cell and membrane bioreactor
Microbial fuel cells (MFC) and membrane bioreactors (MBR) are promising technologies for wastewater treatment. However, both of them have some drawbacks and application limitations. A cost-effective hybrid system (EMBR) integrating MFC with MBR was evaluated in terms of treatment performance and membrane fouling. In this paper, two electric field directions with a membrane module in the ...
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Performance of membrane bioreactor to different hydraulic shock loadings
A Membrane Bioreactor (MBR) treating simulated sewage was operated and stabilised for a period of 60 days at an organic loading rate of 3.6 g/COD/day and Hydraulic Retention Time (HRT) of 8 h, during which the MBR showed 95% removal of Chemical Oxygen Demand (COD), 98% removal of Total Organic Carbon (TOC) and TSS, 91% removal of Total Kjeldahl Nitrogen (TKN) and 30% removal of phosphate. The ...
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Membane bioreactors: is submerged best?
Untitled Document The energy and space-saving characteristics of submerged membrane bioreactors have prompted many to view them as the most efficient and cost effective wastewater treatment technology. But there are equally viable alternatives, argues Ronald van ‘t Oever of Netherlands-based X-Flow. A membrane bioreactor (MBR) is a compact-built purification system combining ...
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