hollow fibre membrane Articles

  • Long Term Experience with Hollow Fibre Membrane Bioreactors

    Abstract The membrane bioreactor (MBR) technology has been proven as a single step process to treat wastewater and produce an outstanding effluent quality suitable for reuse, either directly or as a pretreatment to reverse osmosis. While it is relatively simple to combine activated sludge with a membrane separation step, a number of challenges must be met to provide a process suitable for ...

  • Evaluation of novel hollow fibre membranes for NOM removal by advanced membrane autopsy

    A full-scale inside out hollow fibre membrane module was operated in a pilot-scale water treatment plant in Sweden for a period of 12 months from August 2013 to July 2014. Liquid chromatography– organic carbon detection (LC-OCD) chromatogram indicated the membranes could effectively remove 86% of dissolved organic carbon and 92% of humic substances from the feedwater. Routine cleaning-in-place ...


    By IWA Publishing

  • Hydrogenotrophic denitrification of drinking water using a hollow fibre membrane bioreactor

    The objective of this research was to investigate the performance of a hollow fibre membrane bioreactor (HFMB) for hydrogenotrophic denitrification of contaminated drinking water. In the HFMB, H2 flows through the lumen of the hydrophobic hollow fibres and diffuses to an attached H2 oxidizing biofilm. Nitrate in the contaminated water serves as an electron acceptor. A hydrogenotrophic ...


    By IWA Publishing

  • Hydrogenotrophic denitrification of drinking water using a hollow fibre membrane bioreactor

    ABSTRACTThe objective of this research was to investigate the performance of a hollow fibre membrane bioreactor (HFMB) for hydrogenotrophic denitrification of contaminated drinking water. In the HFMB, H2 flows through the lumen of the hydrophobic hollow fibres and diffuses to an attached H2 oxidizing biofilm. Nitrate in the contaminated water serves as an electron acceptor. A hydrogenotrophic ...


    By IWA Publishing

  • Experimental evaluation of intermittent aeration of a hollow fibre membrane bioreactor

    Intermittent membrane aeration provides a substantially improved energy efficiency in hollow fibre-based immersed membrane bioreactors (HF iMBRs). The benefits of intermittent aeration have been assessed with respect to sustaining a target flux and/or limiting the fouling rate to a sustainable level based on a small plant using full-scale HF modules. Results show that for the same specific ...


    By IWA Publishing

  • Preparation and surface modification of hollow fibre membranes for drinking water disinfection and water reclamation

    Polysulphone hollow fibres were spun according to phase inversion process under different conditions by extrusion of dimethylformamide solution of the polymer through double orifice spinneret using water or water-DMF mixture as gelation medium. The membrane surface was modified by in situ interfacial polymerisation of m-phenylenediamine with trimesoyl chloride. The nominal molecular weight ...


    By Inderscience Publishers

  • An assessment of oxygen transfer efficiency in a gas permeable hollow fibre membrane biological reactor

    The clean water oxygen transfer efficiency (OTE) of a full scale non-porous hollow fibre gas permeable (GP) membrane (surface area of 500 m2) was evaluated at inlet air pressures of 1.2, 1.4, and 1.8 atm using two established testing methods. To form a basis of comparison with traditional aeration technologies, additional testing was done with conventional aerators (fine bubble and coarse bubble ...


    By IWA Publishing

  • Estimation of shear stress working on submerged vertically set hollow fibre membrane in MBRs

    This study is aimed at elucidating the mechanism by which rising air bubbles induce shear stress on the surface of hollow fibre membranes in submerged membrane bioreactors (MBRs). Shear stress working on vertically set hollow fibre membrane surfaces caused by aeration was measured directly using a two-direction load sensor connected to one hollow fibre at the centre of the ‘vegetation’ of the ...


    By IWA Publishing

  • Biomass properties and permeability in an immersed hollow fibre membrane bioreactor at high sludge concentrations

    This study aimed to investigate the influence of biomass properties and high mixed liquor suspended solids (MLSS) concentrations on membrane permeability in a pilot-scale hollow fibre membrane bioreactor treating domestic wastewater. Auxiliary molasses solution was added to maintain system operation at constant food-to-microorganisms ratio (F/M = 0.13). Various physicochemical and ...


    By IWA Publishing

  • Direct pre-treatment of surface water through submerged hollow fibre ultrafiltration membranes

    The most distinctive characteristic of the Mediterranean climate is its strong seasonality, dry summers and intense rainfall episodes concentrated in spring and autumn. This changeability is translated into a wide variability of the water resources in terms of quantity and quality. Barcelona, located in the northeast extreme of the Iberian Peninsula, shows all the characteristics of the ...


    By IWA Publishing

  • Characterization of the inline virus removal performances in hollow fibre modules by a new tracer electrochemically detected

    In a previous work, an innovative and patented method was presented, that is based on a new virus surrogate. This surrogate is an enzyme-labelled MS2 phage that is directly detectable and quantifiable by amperometry thanks to its induced enzymatic activity. In this work, this method was used to characterize the dynamics of virus removal in micromodules as a function of the membrane defect size ...


    By IWA Publishing

  • 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

  • Are membranes the answer to odor?

    ABSTRACT A microporous hollow fibre membrane operating in non-wetted mode has been applied to the removal of hydrogen sulphide from gas streams. The case studies under investigation were (i) H2S absorption within single passage through the membrane and (ii) H2S absorption with recycle. Counter-current flow configuration was considered with the test contaminant passing through the shell-side of ...

  • 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 ...


    By IWA Publishing

  • Treatment of municipal wastewater by membrane bioreactor: a pilot study

    The operational performance of a submerged hollow fibre Membrane Bio-Reactor (MBR) for treatment of municipal wastewater on pilot scale was investigated. The experimental results indicated that the removal efficiency for SS, COD, NH4-N, turbidity, bacterium, iron (Fe2+) and Manganese (Mn2+) was 100%, 94.5%, 98.3%, 99.7%, lg6, 99%, 92.3%, respectively. The water quality of the effluent was quite ...


    By Inderscience Publishers

  • Desalination of brackish groundwater by direct contact membrane distillation

    The direct contact membrane distillation (DCMD) applied for desalination of brackish groundwater with self-made polyvinylidene fluoride (PVDF) membranes was presented in the paper. The PVDF membrane exhibited high rejection of non-volatile inorganic salt solutes and a maximum permeate flux 24.5 kg m−2 h−1 was obtained with feed temperature at 70°C. The DCMD experimental results indicated that the ...


    By IWA Publishing

  • The hybrid process TiO2/PAC: performance of membrane filtration

    In investigations concerning the photocatalytic degradation by TiO2 usually filter discs with a pore size of 0.22 μm and 0.45 μm are used for the removal of photocatalyst particles in aqueous suspensions. In this study the effective rejection of suspended particles by microfiltration in different types of membrane modules and with different membrane materials was investigated. Furthermore, ...


    By IWA Publishing

  • The best alternative to the protection of the UF membranes - Case Study

    Advance solutions to the recirculation of water in swimming pools. Problem The public swimming pools are continuously used during all the week for many people for making sport, amusement or relax. In these installations, the visual aspect and the sanitary conditions must be guaranteed all the time. In indoor public pools, even with the mandatory previous shower and the use of ...


    By Sistema Azud, S.A.

  • The significance of interactions between organic compounds on low pressure membrane fouling

    Fouling of hollow fibre microfiltration and ultrafiltration membranes by solutions of pure organic compounds and mixtures of these compounds was studied with a backwashable membrane filtration apparatus. Small molecular weight compounds resulted in little fouling, while their polymeric analogues resulted in more severe fouling. Neutrally charged dextran resulted in minor, irreversible fouling, ...


    By IWA Publishing

  • Gravity driven membrane filtration system to improve the water quality in rainwater tanks

    The characterisation of rainwater in metropolitan Sydney and in rural New South Wales was undertaken. The results showed that factors such as the lack of vehicular traffic, air pollution and urban contamination meant that rural rainwater water quality was better. The rain water collected in both metropolitan and rural areas generally complied with the 2004 Australian Drinking Water Guidelines ...


    By IWA Publishing

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