membrane filtration Articles
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Membrane filtration
Membrane is a thin layer of material that is capable of separating compounds as a function of physical and chemical properties when a driving force is applied across the membrane, which has been widely used in a wide range of applications in water industry [1]. Membrane can be classified by the range of compounds separated and the driving forces employed. For example, microfiltration (MF), ...
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Anaerobic membrane bioreactor for high-strength wastewater treatment: batch and continuous operation comparison
The anaerobic membrane bioreactor (AnMBR) is a recent development in high-rate anaerobic bioreactors. This study assessed the treatment of high-strength wastewater by an AnMBR using batch and continuous feeding operation. The results showed that the AnMBR could establish a biomass concentration of 6–8 g/L in approximately 20 days due to retention of micro-organisms by the membrane, ...
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Assessment of the best available wastewater management techniques for a textile mill: cost and benefit analysis
In the present study, several water recovery and end-of-pipe wastewater treatment alternatives were evaluated towards the evaluation of Best Available Techniques (BATs) for the management of wastewaters from a denim textile mill in accordance with the European Union's Integrated Pollution Prevention and Control (IPPC) Directive. For this purpose, an assessment that translates the key ...
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Fouling modeling of the mixed liquor in MBR by the individual and combined models
To predict the membrane fouling phenomena in the membrane filtration operation, the individual models derived from Darcy's law and the corresponding combined models were employed to investigate the kind of models that provided better fits. The filtration of the mixed liquid from membrane bioreactors with different sludge retention time (SRT) at a constant pressure was carried out. The ...
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Use of flocculants for increasing permeate flux in anaerobic membrane bioreactors
Biomass retention, required for high rate anaerobic wastewater treatment, can be accomplished coupling an anaerobic bioreactor with membrane filtration. However, low flux seems to be a common factor when operating anaerobic membrane bioreactors (AnMBRs). Modification of biomass properties may represent a strategy for improving membrane flux. The addition of flocculants was tested as a tool for ...
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Performance results of the treatment of stillage using two-stage anaerobic digestion coupled to membrane filtration at different operating conditions
The production of ethanol is results in generation of large amounts of liquid residue (stillage). Anaerobic membrane bioreactors (AnMBRs) are a promising technology primarily for the treatment of high strength wastewater, having lower energy requirements as compared to aerobic ones and higher effluent quality as compared to conventional anaerobic reactors. AnMBR applied to stillage treatment ...
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Effect of upflow velocity on the performance of an inclined plate membrane bioreactor treating municipal wastewater
An inclined plate membrane bioreactor (iPMBR) was introduced to meet the challenge of handling high mixed liquor suspended solids when operating at long sludge retention times. During the first 407 days of operation, the iPMBR was able to rezone more sludge (1.5–10.5 times greater) in its upstream, anoxic tank compared to its downstream, aerobic tank. This could extend membrane filtration by ...
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Removal and transformation of dissolved organic matter (DOM) during the treatment of partially stabilized leachate in membrane bioreactor
The removal of dissolved organic matter (DOM) during municipal solid waste leachate treatment in a membrane bioreactor (MBR) was investigated. The MBR was operated with fouled and cleaned membranes, at a time. DOM, mixed liquor, and effluent were characterized by fractionation and fluorescence excitation–emission matrix (EEM) spectroscopy. Results showed DOM removals of 82% during ...
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Membrane technology for the future treatment of paper mill effluents: chances and challenges of further system closure
The pressure on the European paper industry to further close its water circuits has increased significantly during the past decade. Since the technologies of the past can no longer meet the requirements of the future, new water treatment methods have become necessary. A constant rise in the interest in membrane technology expressed by the European paper industry confirms that in the future this ...
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Wastewater treatment facility upgrade uses combination of technologies to solve nutrient removal challenges
New regulations required the 7.5 ML/d North East River Advanced Wastewater Treatment Facility to upgrade to meet lower annual average effluent nitrogen and phosphorus limits. At the same time, facility planning was underway to expand the facility to 17.0 ML/d to accommodate planned growth in the service area. Following a pilot study to establish the performance capabilities of the existing ...
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Evaluation of the importance of various operating and sludge property parameters to the fouling of membrane bioreactors
A single-fibre microfiltration system was employed to investigate the importance of various operating and sludge property parameters to the membrane fouling during sludge filtration. The sludge was obtained from a submerged membrane bioreactor (SMBR). A series of comparative and correlative filtration and fouling tests were conducted on the influence of the operating variables, sludge properties ...
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Low energy consumption vortex wave flow membrane bioreactor
In order to reduce the energy consumption and membrane fouling of the conventional membrane bioreactor (MBR), a kind of low energy consumption vortex wave flow MBR was exploited based on the combination of biofilm process and membrane filtration process, as well as the vortex wave flow technique. The experimental results showed that the vortex wave flow state in the membrane module could be ...
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High strength distillery wastewater treatment by a PAC-MBR with low PAC dosage
Augmentation of membrane bioreactors (MBRs) with activated carbon is established to offer several operational advantages. This work investigates the influence of low dosing (2 g/L) of powdered activated carbons (PACs) with different characteristics on the performance of MBR treating high strength molasses distillery wastewater containing difficult-to-biodegrade recalcitrant components. Two ...
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Membrane technology for the future treatment of paper mill effluents: chances and challenges of further system closure
The pressure on the European paper industry to further close its water circuits has increased significantly during the past decade. Since the technologies of the past can no longer meet the requirements of the future, new water treatment methods have become necessary. A constant rise in the interest in membrane technology expressed by the European paper industry confirms that in the future this ...
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Filterability assessment in membrane bioreactors using an
in-situ filtration test cellA new method for the assessment of the filterability in membrane bioreactors was tested for five months in four MBR units in Berlin. The new method BFM (Berlin Filtration Method) for filterability assessment uses a small membrane filtration test cell which can be submerged directly in the biological tanks to determine the filterability of the activated sludge in-situ. The test cell contains an ...
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Characterisation of RO fouling in an integrated MBR/RO system for wastewater reuse
Membrane filtration has gradually gained acceptance as the preferred pre-treatment for reverse osmosis (RO). In this paper, an integrated membrane bioreactor (MBR)/RO system for wastewater reuse treating real sewage water has been evaluated and the RO fouling has been characterised. The MBR achieved low values of organic matter, total nitrogen, PO43−, total organic carbon, turbidity and ...
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Cost comparison of full-scale water reclamation technologies with an emphasis on membrane bioreactors
The paper assesses the costs of full-scale membrane bioreactors (MBRs). Capital expenditures (CAPEX) and operating expenses (OPEX) of Spanish MBR facilities have been verified and compared to activated sludge plants (CAS) using water reclamation treatment (both conventional and advanced). Spanish MBR facilities require a production of 0.6 to 1.2 kWh per m3, while extended aeration (EA) and ...
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Enhanced membrane bioreactor process without chemical cleaning
In membrane bioreactors (MBR) for wastewater treatment, the separation of activated sludge and treated water takes place by membrane filtration. Due to the small footprint and superior effluent quality, the number of membrane bioreactors used in wastewater treatment is rapidly increasing. A major challenge in this process is the fouling of the membranes which results in permeability decrease and ...
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Evaluation of different configurations of hybrid membrane bioreactors for treatment of domestic wastewater
Four membrane bioreactors (MBRs) with the same dimensions were studied for 180 days: three hybrid growth membrane bioreactors with biofilm attached in different packing media and a conventional MBR (C-MBR). The four MBRs had an identical membrane module of hollow fiber with a nominal porous diameter of 0.4 μm. The MBRs were: (1) a C-MBR; (2) a moving bed membrane bioreactor (MB-MBR), ...
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SANASA Capivari II – the first full-scale municipal membrane bioreactor in Latin America
The macro region of Campinas (Brazil) is rapidly evolving with new housing developments and industries, creating the challenge of finding new ways to treat wastewater to a quality that can be reused in order to overcome water scarcity problems. To address this challenge, SANASA (a publicly owned water and wastewater concessionaire from Campinas) has recently constructed the ‘EPAR (Water ...
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