Membrane Bioreactor Membrane Articles on Environmental XPRT

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 ...

Oct. 6, 2011

By Dynatec Systems Inc.

Membrane Bioreactor for Sanitary Landfill

The Problem The county of Warren NJ owns and operates a sanitary landfill in Oxford Twp, NJ. The facility generates an average of 50,000 gallons per day of leachate, with peaks to 100,000 gallons per day. The facility was discharging to a local POTW from their lagoon, but they were facing requirements for nitrogen removal from the POTW and needed a new system to provide ...

Oct. 6, 2011

By Dynatec Systems Inc.

Energy efficiency in membrane bioreactors

Energy consumption remains the key factor for the optimisation of the performance of membrane bioreactors (MBRs). This paper presents the results of the detailed energy audits of six full-scale MBRs operated by Suez Environnement in France, Spain and the USA based on on-site energy measurement and analysis of plant operation parameters and treatment performance. Specific energy consumption is ...

Jun. 21, 2013

By IWA Publishing

Membrane Bioreactors for RO Pretreatment

ABSTRACTCurrently, treated municipal wastewater is typically discharged to the environment in most parts of the world. It is, however, a potential water resource from which high quality water for reuse can be produced. Reuse applications include both non-potable applications such as irrigation and production of industrial process water, and indirect potable reuse including aquifer recharge. For ...

Oct. 22, 2006

By Water Environment Federation (WEF)

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 ...

Oct. 6, 2011

By Dynatec Systems Inc.

Pretreatment Requirements for Membrane Bioreactors

Adequate pretreatment including fine screening is essential to the stable, long-term operation of membrane bioreactors (MBR) used to treat municipal wastewater. The amount of screenings generated by a screen with 1-2 mm size openings ranges between 10-25 dry mg/L. The cost of fine screening represents less than 3% of the total investment cost for a MBR-based wastewater treatment facility. Case ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Membrane Bioreactor for Retirement Community

The facility: Glen Meadows is a retirement community located next to Gunpowder Falls State Park in north-central Maryland’s open country. The community has Independent Living, Assisted Living, and Skilled Nursing and Rehabilitation facilities. The problem: The facility has grown significantly over the years. At first, a septic system ...

Oct. 6, 2011

By Dynatec Systems Inc.

Membrane Bioreactor for Automobile Manufacturer

Dynatec provided a system to treat wastewater from Ford's automotive assembly plant. The Problem The existing batch chemical treatment system for oil and metals removal was unable to meet the new standards for discharge to local POTW. The new requirements called for lower BOD and total Nitrogen and there was no way to make the existing system able to meet the standards. ...

Oct. 7, 2011

By Dynatec Systems Inc.

The cost of a small membrane bioreactor

The individual cost contributions to the mechanical components of a small membrane bioreactor (MBR) (100–2,500 m3/d flow capacity) are itemised and collated to generate overall capital and operating costs (CAPEX and OPEX) as a function of size. The outcomes are compared to those from previously published detailed cost studies provided for both very small containerised plants (<40 ...

Jul. 23, 2015

By IWA Publishing

Evaluation of membrane bioreactor technology and desalting membranes for reuse..

The City of Rio Rancho and MWH have recently completed a pilot-testing program to evaluate MBR technology followed by reverse osmosis (RO) membranes during operation on municipal wastewater. The pilot testing program is part of an overall water reuse plan being implemented by the City of Rio Rancho, NM to conserve water supplies through recycling of wastewater currently being discharged to the ...

Nov. 10, 2007

By Toray Chemical Korea

Proteins causing membrane fouling in membrane bioreactors

In this study, the details of proteins causing membrane fouling in membrane bioreactors (MBRs) treating real municipal wastewater were investigated. Two separate pilot-scale MBRs were continuously operated under significantly different operating conditions; one MBR was a submerged type whereas the other was a side-stream type. The submerged and side-stream MBRs were operated for 20 and 10 ...

Jun. 2, 2015

By IWA Publishing

Fouling with aerobic granule membrane bioreactor

Aerobic granulation (AG) and membrane bioreactor (MBR) are two promising, novel environmental biotechnological processes that draw interest of researchers working in the area of biological wastewater treatment. Membrane fouling in the combined aerobic granular membrane bioreactor (AGMBR) process and the conventional MBR process was investigated in this work. The irreversible fouling on ...

Jan. 1, 2011

By IWA Publishing

Modeling bioaugmentation with nitrifiers in membrane bioreactors

Bioaugmentation with nitrifiers was studied using two pilot-scale membrane bioreactors, with the purpose of assessing the suitability of state-of-the-art activated sludge models (ASMs) in predicting the efficiency of bioaugmentation as a function of operating conditions. It was demonstrated that the temperature difference between seeding and seeded reactors (ΔT) affects ...

Jan. 21, 2015

By IWA Publishing

Considerations for the design and operation of a membrane bioreactor

This paper reviews recent advances in research focusing on the design and operation of a membrane bioreactor and including methodologies for determining the timing for hydraulic and sludge retention, sludge concentration optimisation, the removal of nitrogen and phosphorus, membrane fouling control, and the analysis of processing economics.Keywords: membrane bioreactors, activated sludge, ...

Apr. 9, 2007

By Inderscience Publishers

Fouling membrane in an anaerobic membrane bioreactor treating municipal wastewater

An anaerobic membrane reactor (AnMBR) treating municipal wastewater was evaluated. The experiments were performed using a pilot-scale up-flow anaerobic sludge blanket reactor with a submerged tubular ultrafiltration membrane at a hydraulic retention time of 8 hours. The system worked at an intermittent filtration mode (4 min on/1 min off) with and without nitrogen gas bubbling during the ...

Jan. 1, 2017

By IWA Publishing

Influence of membrane properties on physically reversible and irreversible fouling in membrane bioreactors

This study aimed to examine the impact of membrane properties on membrane fouling in membrane bioreactor (MBR). Membrane fouling was divided into two categories: physically reversible and irreversible fouling. Membrane properties related to each type of membrane fouling were investigated separately. Five microfiltration (MF) and one ultrafiltration (UF) membranes with different properties (pore ...

May 1, 2010

By IWA Publishing

A venturi device reduces membrane fouling in a submerged membrane bioreactor

In this study, for the first time, a venturi device was integrated into a submerged membrane bioreactor (MBR) to improve membrane surface cleaning and bioreactor oxygenation. The performances of a blower and the venturi device were compared in terms of membrane fouling and bioreactor oxygenation. Upon comparing membrane fouling, the performances were similar for a low operation flux (18 ...

Apr. 20, 2016

By IWA Publishing

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 ...

Jan. 1, 2011

By IWA Publishing

Dynamic Mathematical Modeling of Membrane Fouling in Submerged Membrane Bioreactors

ABSTRACTA mathematical model is developed that accounts for internal fouling of membranes due to soluble microbial products during subcritical flux operation, and for supercritical flux fouling due to cake formation and compression.. The model takes into account the filtration effect generated by the cake. A set of differential equations is derived and solved numerically to obtain a description ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Alternative energy efficient membrane bioreactor using reciprocating submerged membrane

A novel membrane bioreactor (MBR) pilot system, using membrane reciprocation instead of air scouring, was operated at constant high flux and daily fluctuating flux to demonstrate its application under peak and diurnal flow conditions. Low and stable transmembrane pressure was achieved at 40 l/m2/h (LMH) by use of repetitive membrane reciprocation. The results reveal that the inertial forces ...

Dec. 19, 2014

By IWA Publishing

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