membrane bioreactor Articles
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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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Advantages of MBRs Over Conventional Biological Treatment Method
1. What is MBR (Membrane Bioreactor)? The MBR (Membrane Bioreactor) which was first used in the late 1960s made a revolution in the wastewater industry in the early 1990s by combining membrane filtration with a biological treatment solution to treat wastewater. It's been commonly used since then and can be seen widely practiced in the design of both new and old wastewater treatment facilities. ...
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Sludge-bed anaerobic membrane bioreactor treating prehydrolysis liquor (PHL): correlation of cATP™ with performance parameters
Cellular adenosine triphosphate (cATP™) may be used to characterize the biological degradation activity within the anaerobic and aerobic wastewater treatment systems. The feasibility of using cATP™ as a process monitoring parameter for an anaerobic membrane bioreactor was evaluated. Results obtained from batch respirometric anaerobic treatability studies and a continuous sludge-bed anaerobic ...
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Electrically enhanced MBR system for total nutrient removal in remote northern applications
Thousands of sparsely populated communities scatter in the remote areas of northern Canada. It is economically preferable to adopt the decentralized systems to treat the domestic wastewater because of the vast human inhabitant distribution and cold climatic conditions. Electro-technologies such as electrofiltration, elctrofloatation, electrocoagulation and electrokinetic separation have been ...
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Membrane Bioreactor Pilot
The problem A company which produces a product that requires a constant supply of relatively clean water is planning to expand by adding new process units online. The plant currently uses well water as a supply to its production. The water production from the well is limited. They need to install a system to produce reuse water to reduce the amount of water required from the onsite well in ...
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Model-based methodology for the design of optimal control strategies in MBR plants
This paper proposes a model-based methodology that allows synthesising the most appropriate strategies for optimising the operation of wastewater treatment plants (WWTPs). The methodology is applied with the aim of maximising the nitrogen removal in membrane bioreactors (MBRs). The proposed procedure is based on a systematic approach composed of four steps. First, a sensitivity analysis of ...
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Application of nanofiltration for reuse of wastewater
The present research is a part of efforts to reuse wastewater by applying nanofiltration (NF) method for the secondary treatment of bio–treated wastewater and to check the quality of product water as irrigation water by using various analytical methods. For this, the performances of three different NF membranes (CK, GE–Osmonics; NF–270 and NF–90, Dow–FilmTech) were investigated using a cross–flow ...
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Removal of pharmaceuticals and personal care products in a membrane bioreactor wastewater treatment plant
Ninety-nine pharmaceuticals and personal care products (PPCPs) were analyzed in influent, final effluent, and biosolids samples from a wastewater treatment plant employing a membrane bioreactor (MBR). High concentrations in influent were found for acetaminophen, caffeine, metformin, 2-hydroxy-ibuprofen, paraxanthine, ibuprofen, and naproxen (104–105 ng/L). Final effluents contained ...
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Start-up of membrane bioreactor and hybrid moving bed biofilm reactor–membrane bioreactor: kinetic study
A hybrid moving bed biofilm reactor–membrane bioreactor (hybrid MBBR-MBR) system was studied as an alternative solution to conventional activated sludge processes and membrane bioreactors. This paper shows the results obtained from three laboratory-scale wastewater treatment plants working in parallel in the start-up and steady states. The first wastewater treatment plant was a MBR, the ...
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Treatment of domestic wastewater with an anaerobic ceramic membrane bioreactor (AnCMBR)
In this study, a ceramic membrane with a pore size of 80 nm was incorporated into an anaerobic membrane bioreactor for excellent stability and integrity. Chemical oxygen demand (COD) removal efficiencies by biodegradation reached 78.6 ± 6.0% with mixed liquor suspended solids (MLSS) of 12.8 ± 1.2 g/L. Even though the total methane generated was 0.3 ± 0.03 L/g CODutilized, around 67.4% of it ...
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A performance evaluation of three membrane bioreactor systems: aerobic, anaerobic, and attached-growth
Water sustainability is essential for meeting human needs for drinking water and sanitation in both developing and developed countries. Reuse, decentralization, and low energy consumption are key objectives to achieve sustainability in wastewater treatment. Consideration of these objectives has led to the development of new and tailored technologies in order to balance societal needs with the ...
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Membrane Bioreactor for National Park
The problem: Assateague Island is a barrier island that stretches from the Eastern shore of Maryland down Atlantic coast to Virginia. The island is a National Park, administered by the National Park Service, under the National Seashore division. Assateague Island is a vital resting and feeding area for birds and also is home to more than 300 wild ponies. The park receives about 1 million ...
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Comparison of two treatments for the removal of selected organic micropollutants and bulk organic matter: conventional activated sludge followed by ultrafiltration versus membrane bioreactor
The potential of membrane bioreactor (MBR) systems to remove organic micropollutants was investigated at different scales, operational conditions, and locations. The effluent quality of the MBR system was compared with that of a plant combining conventional activated sludge (CAS) followed by ultrafiltration (UF). The MBR and CAS-UF systems were operated and tested in parallel. An MBR pilot plant ...
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Trace organics removal using three membrane bioreactor configurations: MBR, IFAS-MBR and MBMBR
Seventeen pharmaceutically active compounds and 22 other trace organic pollutants were analysed regularly in the influent and permeate from a semi-real plant treating municipal wastewater. The plant was operated during 29 months with different configurations which basically differed in the type of biomass present in the system. These processes were the integrated fixed-film activated sludge ...
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Enrichment and application of nitrifying activated sludge in membrane bioreactors
In this study, nitrifying bacteria were enriched in a membrane bioreactor (MBR, R1) and their bioaugmentation effectiveness was evaluated in another two MBRs (R2 and R3). Nitrifying activated sludge (NAS) with high nitrification activity of up to 3,000 mg-N/(L·d)−1 was successfully enriched in R1. The results showed that chemical oxygen demand concentration of 100–200 mg/L had no negative ...
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TITAN MBR - Food Processing - Case Study
One of the world’s leading producers of macadamia nuts produces more than 15 million pounds each year from its Hawaii processing plant. Producing the nuts is a rather meticulous process that involves multiple steps, including collection, high-strength cracking, cleaning and dehydration. High-strength wastewater is primarily generated from the nut-cleaning stage, in this case more than ...
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Extension of two large wastewater treatment plants in Stockholm using membrane technology
Like many other large cities, Stockholm is facing increased urbanization with densification of infrastructure as a result. At the same time, implementation of the Baltic Sea Action Plan and the EU Water Framework Directive is expected to result in more stringent effluent quality demands. The current situation gives rise to new challenges for the municipal wastewater treatment plants (WWTPs). ...
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High strength domestic wastewater treatment with submerged forward osmosis membrane bioreactor
Forward osmosis membranes are less prone to fouling with high rejection of salts, and the osmotic membrane bioreactor (OMBR) can be considered as an innovative membrane technology for wastewater treatment. In this study, a submerged OMBR having a cellulose triacetate membrane, with the active layer facing the feed solution configuration, was operated at different organic loading rates (OLRs), ...
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Do nonwovens offer a cheaper option?
Untitled Document Could nonwoven filtration material be used as a viable, cheaper alternative to hollow fibre membranes in submerged membrane bioreactors, without a loss in performance? Filtration + Separation takes a look at one research report that thinks so. Nonwoven for the MBR – why bother? The Membrane Bioreactor (MBR) is an evolving process that combines ...
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Monitoring benzotriazoles: a 1 year study on concentrations and removal efficiencies in three different wastewater treatment plants
Benzotriazole (BTri), 4- and 5-tolyltriazole (4-TTri, 5-TTri) were monitored over 1 year in three wastewater treatment plants (WWTPs) with a membrane bioreactor (MBR-MH) and two conventional activated sludge systems (CAS-E, CAS-M). The influent/effluent concentrations and treatment stages removal efficiencies were monitored. 5-TTri was removed best (mean removal 80%) in the WWTP mainly ...
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