bioreactor operation Articles

  • 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, ...


    By Inderscience Publishers

  • Commissioning and operating submerged membrane bioreactors: a designer's perspective

    Submerged Membrane Bioreactor (MBR) applications for wastewater treatment have taken off in recent years in New Zealand. From designer perspectives, the membrane modules replace the conventional secondary clarifier, thus eliminating solids settling issues and reducing plant footprint. This paper discusses the recent experiences of Harrison Grierson Consultants Limited designing and commissioning ...


    By Inderscience Publishers

  • Evaluation of Novel Operational Strategies for Submerged Membrane Bioreactors

    MBR technology is still expensive to operate when compared to more traditional alternatives. The cost of the membrane and its operation is a significant variable in the overall capital and operational costs of an MBR. A novel dynamic scouring aeration control for membrane bioreactors is proposed in this contribution in order to minimize internal fouling of the membrane and increase the maximum ...

  • Modular operation of membrane bioreactors for higher hydraulic capacity utilisation

    Using data from 6 full-scale municipal membrane bioreactors (MBR) in Germany the hydraulic capacity utilisation and specific energy consumption were studied and their connexion shown. The average hydraulic capacity utilisation lies between 14% and 45%. These low values are justified by the necessity to deal with intense rain events and cater for future flow increases. However, this low hydraulic ...


    By IWA Publishing

  • 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 ...


    By Dynatec Systems Inc.

  • Investigation of long-term operation and biomass activity in a membrane bioreactor system

    The aim of this work was to evaluate the long-term performance of a Membrane Bioreactor (MBR) that operated continuously for 2.5 years and to assess membrane fouling and biomass activity under various operating conditions. Furthermore, a method for the characterisation of influent wastewater was developed based on its separation into various fractions. The MBR system operated at the solids ...


    By IWA Publishing

  • Influence of Operating Conditions on Fouling Behavior in Wastewater Membrane Bioreactor Process

    ABSTRACTMembrane fouling was studied using three pilot-scale submerged membrane bioreactors operated at a series of permeation and aeration conditions to treat municipal wastewater. The transmembrane pressure increases were used to calculate the fouling ratios to compare the relative fouling rates. The results showed that the trends of fouling resistances differed greatly, depending on the ...

  • Flux-step method for the assessment of operational conditions in a submerged membrane bioreactor

    A flux-step method was used for monitoring the pressure variation in a solids separation membrane at different operating conditions. A submerged membrane bioreactor pilot plant, used during the short-term tests, was used to purify actual restaurant wastewater. The influence of membrane backwash and relaxation on the variation of pressure variation was also evaluated. In order to reduce the ...


    By IWA Publishing

  • Design and operating experiences of full-scale municipal membrane bioreactors in Japan

    In Japan, membrane bioreactor (MBRs) have been installed in 17 small-scale municipal wastewater treatment plants (WWTPs) in the past 8 years, together with two recently installed MBRs for larger-scale WWTPs. In this study, design and operating data were collected from 17 of them as part of a follow-up survey, and aspects including system design, biological treatment, membrane operation, problems ...


    By IWA Publishing

  • MBR Operation

    Although membrane bioreactor (MBR) technology has grown up to become a state-of-the-art in municipal wastewater treatment during the last decade, design, construction and operation of  MBRs has not yet become a routine function. An insight into the practice of MBR technology will be available as a report at IWA Publishing by October 2010. ‘Operating Large-Scale Membrane ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • Performance Assessment of New Membrane Bioreactor Systems at Average and Peak Flow Operation

    To assess the operational performance and effluent water quality of five newly developed membrane bioreactor systems, MWH and City of San Diego conducted a 18-month pilot study at the Point Loma Wastewater Treatment (PLWWTP), San Diego, CA. Various configurations of MBR systems, i.e. hollow-fiber, flat-sheet and external tubular membranes, were tested during the study. Funded by the U.S. Bureau ...

  • 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 ...


    By IWA Publishing

  • 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 ...


    By Dynatec Systems Inc.

  • 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, ...


    By IWA Publishing

  • Effects of FeCl3 addition on the operation of a staged anaerobic fluidized membrane bioreactor (SAF-MBR)

    The effects on sulfur removal and membrane fouling resulting from FeCl3 addition to an anaerobic fluidized membrane bioreactor (AFMBR) in a staged AFMBR (SAF-MBR) was investigated. Total sulfur removal in the SAF-MBR was 42–59% without FeCl3 addition, but increased to 87–95% with FeCl3 addition. Sulfide removal in the AFMBR increased to 90% with addition of FeCl3 at ...


    By IWA Publishing

  • Alternate anoxic/aerobic operation for nitrogen removal in a membrane bioreactor for municipal wastewater treatment

    A large pilot-scale membrane bioreactor (MBR) with a conventional denitrification/nitrification scheme for municipal wastewater treatment has been run for one year under two different aeration strategies in the oxidation/nitrification compartment. During the first five months air supply was provided according to the dissolved-oxygen set-point and the system run as a conventional ...


    By IWA Publishing

  • 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 ...

  • Tomato Processor Pilot Bioreactor

    98% Average Reduction in BOD & TSS A tomato processing facility was required by the city to reduce BOD from 4,000 ppm to 200 ppm. Integrated Engineers proposed a small scale Bioreactor to prove the effectiveness of the activated sludge process on the customer’s wastewater as well as establishing the parameters for a full scale system design. The trailer mounted ...


    By Integrated Engineers Inc.

  • Future Perspectives in Bioreactor Development

    The paper discusses conversion capacities of both anaerobic and aerobic wastewater treatment systems in relation to growth kinetics, hydrodynamics and biomass concentration. In the current modern anaerobic high-rate reactors the conversion potentials are optimally exploited. This is not yet true for aerobic systems since operation of aerobic systems under conditions of low biomass growth reduces ...


    By Paques B.V.

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you