UF filter membrane cleaning Articles

  • Critical flux investigation in treating o/w emulsion by TiO2/Al2O3-PVDF UF membrane

    A standard transmembrane pressure (TMP) step method has been used in membrane fouling assessment in tube ultrafiltration (UF) membrane system treating oil water (o/w) emulsion operated at constant TMP. Three flux reduction curve with different o/w concentration based on TMP variation were concluded by experiment, then, to describe fouling behavior and identify the occurrence of fouling in the ...


    By IWA Publishing

  • The impact of anionic polyacrylamide (APAM) on ultrafiltration efficiency in flocculation-ultrafiltration process

    With the purpose of improving the ultrafiltration (UF) efficiency, anionic polyacrylamide (APAM) has been used as a coagulant aid in the flocculation-UF process. In this study, the impact of APAM on UF efficiency has been investigated with regard to membrane fouling, membrane cleaning and effluent quality. The results indicated that the optimal dosage of APAM had positive impacts on membrane ...


    By IWA Publishing

  • Evaluation of the efficiency of polysulfone ultrafiltration membrane-based water purifiers for microbiological decontamination

    Indigenously developed polysulfone Ultrafiltration (UF) membrane-based domestic and industrial water purification units were evaluated for their ability to filter bacteria and viruses from water. Escherichia coli (105 cfu/ml) and P1 phage (106 pfu/ml) were filtered through a Domestic Water Purifier (DWP) (dead-end UF unit) and a large-scale spiral water purifier (cross-flow UF unit) and the ...


    By Inderscience Publishers

  • Nanofiltration for enhanced removal of disinfection by-product (DBP) precursors in swimming pool water–retention and water quality estimation

    Three nanofiltration (NF) membranes with a chlorine tolerance ≥ 1 mg L-1 were applied to reduce DBPs and their precursors in swimming pool water. A lab scale plant with crossflow modules was installed in by-pass at the sand filter outlet of a swimming pool for a period of several weeks. The chlorine tolerances of the membranes SB90 and NP030 were found to be adequate for filtration under swimming ...


    By IWA Publishing

  • Recycle of waste backwash water in ultrafiltration drinking water treatment processes

    In drinking water treatment, ultrafiltration (UF) membrane systems are generally operated at 90 to 95% recovery with production losses resulting from waste residual streams such as backwash water and clean-in-place (CIP) liquid residuals. In drought-prone regions, it may be desirable to apply alternative UF plant design configurations to increase recovery rates and minimize water loss. This ...


    By IWA Publishing

  • RO, UF, MF World Markets Report

    Provides continually updated analyses and forecasts of cross flow microfiltration, reverse osmosis, and ultrafiltration systems and membranes in 80 countries and regions with separate forecasts for each application from desalination to wine ...


    By The McIlvaine Company

  • Fouling of low-pressure membranes during drinking water treatment: effect of NOM components and biofiltration pretreatment

    Fouling is a major challenge for low-pressure membrane drinking water treatment systems. Previous research has demonstrated that under the right conditions, biofiltration is an effective method to reduce fouling of low-pressure polymeric membranes. This study provides additional insight into the effect of biofiltration as a pretreatment for fouling reduction by using river water with different ...


    By IWA Publishing

  • Membrane filtration and sonication for industrial wastewater reuse

    This paper presents an experimental study aimed at estimating the efficiency of the innovative process of ultrafiltration (UF) combined with sonication (Son.) for the refinement of treated effluent to be reused in wet textile processes. Such a novel approach, which has not yet been employed on a full industrial scale, has been experienced at pilot scale on the secondary effluent of the ...


    By IWA Publishing

  • The removal of disinfection by-product precursors from water with ceramic membranes

    The main objective of this work was to investigate the effectiveness of ceramic ultrafiltration (UF) membranes with different pore sizes in removing natural organic matter (NOM) from model solutions and drinking water sources. A lab-scale, cross-flow ceramic membrane test unit was used in all experiments. Two different single-channel tubular ceramic membrane modules were tested with average pore ...


    By IWA Publishing

  • UF Membrane Technology

    UF Membrane Technology Ultrafiltration (UF) is a variety of membrane filtration in which forces, such as pressure or concentration gradients, cause separation through the semi-permeable membrane. High molecular weight suspended solids and solutes remain in the so-called retentate while water and low molecular weight solutes pass through the membrane in the permeate (filtrate). The pore size of ...


    By Jiangsu Jiuwu Hi-tech Co

  • QUA Interviewed by Industrial Waterworld at AMTA Membrane Technology Conference 2016

    QUA’s Director of Sales and Marketing, Fred Wiesler, was recently interviewed by Industrial Waterworld at the American Membrane Technology Association (AMTA)’s Membrane Technology Conference 2016 in San Antonio. Qua's Fred Wiesler describes the company's many offerings, including UF, MBR, and ceramic membranes. Highlighted: fractional electrodeionization (FEDI) technology, which ...


    By QUA Group LLC

  • Intermittent operation of low pressure UF membranes for sewage reuse at household level

    A household-scale wastewater treatment system was operated with domestic sewage. The system could recover gardening/irrigation water from raw sewage or secondary effluent by low pressure ultrafiltration (UF). The UF membranes (surface area = 3.5 m2, pore size = 0.04 μm) were operated at constant transmembrane pressure (0.13 bar). The proposed technology was examined for ...


    By IWA Publishing

  • Continuous water recycling for reusable plastic containers

    Abstract The pilot study and full scale installation of UF-RO based System to recycle around 75% of wastewater from plastic pallet washing facility is described. The installed System had several issues that had to be resolved. Cooling tower was installed to cool water to below 85 o F. Ion exchange Systems were installed after the UF membranes to remove iron and silica. Multiple filtration ...


    By Clean Water Technology, Inc.

  • Using HPSEC to identify NOM fraction removal and the correlation with disinfection by-product precursors

    In this study high performance size exclusion chromatography (HPSEC) was used to compare an ultrafiltration (UF) membrane and alum coagulation for their capacity to remove different fractions of natural organic matter (NOM) from water. At the same time, the removal of disinfection by-product (DBP) precursors, as measured by trihalomethane formation potential (THMFP) and haloacetic acid ...


    By IWA Publishing

  • Hybrid TiO2 photocatalytic oxidation and ultrafiltration for humic acid removal and membrane fouling control

    Hybrid UV/TiO2 photocatalytic oxidation (PCO) and ultrafiltration (UF) process (PCO-UF) were used to remove humic acid (HA) and control membrane fouling. The PCO-UF process showed advantages in terms of higher removal rate of HA, higher permeate flux and less membrane fouling over UF alone and PCO alone on HA removal and membrane fouling control. Membrane material and pH of feed water were shown ...


    By IWA Publishing

  • MIEX® Pretreatment to Micro & UltraFiltration

    There are currently (in 2006) four full-scale membrane plants in operation where the MIEX® Process pre-treats water prior to the membrane process. Two plants use Microfiltration (MF) and two use Ultrafiltration (UF). This technical note highlights the benefits of MIEX® Treatment prior to MF and UF based on operating data and experience at these facilities. In particular, data is provided from the ...


    By Orica Australia Pty Ltd

  • A pilot-scale study of backwashing ultrafiltration membrane with demineralized water

    This study investigates the effectiveness of different backwash waters on ultrafiltration (UF) fouling control on a pilot-scale setup. Surface water and ion exchange (IEX) pretreated surface water were used as feed water. Three backwash waters were tested: demineralized water, UF permeate and nanofiltration (NF) permeate. Results show that backwashing with demineralized water substantially ...


    By IWA Publishing

  • ZENON packaged plants for remote water & wastewater applications

    Jack Noble, Managing Director of ZENON UK, describes their Z-MOD™ and Z-BOX™ modular membrane products, focussing on their application to the provision of potable water supplies and wastewater treatment systems for smaller communities in the more remote parts of the UK. In this article the main features and benefits of Z-MOD™ and Z-BOX™ packaged plant systems are described. These are complete ...


    By Clarity Authoring

  • Dependable Pretreatment for UF Membrane Water Treatment System

    Lake Forest is a small upper class community along the west shore of Lake Michigan about 35 miles north of downtown Chicago, IL. In 1890 a group of residents started the Lake Forest Water Company on the present site to provide water for the residents of the community. Prior to the spring of 2004, the Lake Forest Water Plant provided traditional water treatment. Coagulating chemicals were added to ...

  • Application of backwashing with demineralized water for UF fouling control in UF-RO desalination

    The effectiveness of demineralized water backwash on ultrafiltration (UF) fouling control of seawater is investigated in this study. Fouling experiments for two different backwashes (UF permeate and demineralized water) were conducted at three fluxes: 120, 180 and 240 L/(h m2) to compare their fouling control efficiency on UF membranes. Results show that backwashing with demineralized water ...


    By IWA Publishing

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