membrane cleaning Articles

  • The Chemistry of Membrane Cleaning

    International Products Corporation (IPC), incorporated in 1923, manufactures specialty chemicals. IPC has over 30 years experience making and selling membrane cleaners and formulated lubricants to industry. IPC is the proud recipient of the 2013 Environmental Innovation award by the Suppliers Partnership for the Environment. All products are manufactured in the New Jersey headquarters and are ...

  • White Paper - Four Membrane Cleaning Profile

    Four Membrane Cleaning Profiles With Micro-90® Alkaline Cleaning Solution, Micro® Green Clean Biodegradable Cleaner And Micro® A07 Citric Acid Cleaner SUMMARY Fouling and cleaning profiles of four types of filter membranes were obtained using MICRO-90®, MICRO® GREEN CLEAN and/or MICRO® A07. Simulated fouling processes were performed by using either a ...

  • Effects of tannic acid on membrane fouling and membrane cleaning in forward osmosis

    The fouling behavior during forward osmosis (FO) was investigated. Tannic acid was used as a model organic foulant for natural organic matter analysis since the main characteristics are similar, and calcium ions were added at different concentrations to explore the anti-pollution capability of FO membranes. The initial permeate flux and calcium ions strength were varied in different operating ...


    By IWA Publishing

  • Cleaning clay (aluminosilicates) from fouled membranes

    Abstract Within the lifetime of most reverse osmosis (RO) systems some fouling will adversely affect membrane performance. The major constituents of foulants found on the first position during six years of membrane autopsy at the Genesys Membrane laboratory are clay minerals chemically known as aluminosilicates. Clay is a naturally occurring material found in all RO feed waters ...

  • Mixed oxidants aid in membrane pretreatment, cleaning

    The prevalence of membrane filtration is rapidly growing in both the municipal and industrial water sectors. As membrane chemistries improve, so do operational capacities and process requirements. Two main activities that contribute to membrane efficiency and lifetime are membrane pretreatment and membrane maintenance. Maintenance may be further differentiated into periodic backwashing and ...

  • Genairclean RO membrane cleaning - Case Study

    Trial Period September 2013 to May 2014 Site Water Reuse system, UK Background A Brackish Water Reverse Osmosis (BWRO) system with a history of rapid and consistent membrane fouling was selected to trial the new ‘Genairclean’ micro-bubble multi-mechanism RO membrane cleaning method. The plant reclaims process ...

  • Membrane chemical cleaning: from art to science

    Membrane chemical cleaning is an integral part of operation for micro- and ultrafiltration systems in the water industry and has significant impact on process operations. However, this issue has not been adequately addressed primarily for two reasons: 1) cleaning protocols are typically recommended from membrane manufacturers and some cleaners are proprietary; 2) the issues of membrane fouling ...


    By Pall Corporation

  • Membrane pretreatment and cleaning – mixed oxidants in practice

    The prevalence of membrane filtration is rapidly growing in both the municipal and industrial water sectors. As membrane chemistries improve, so too do operational capacities and process requirements. Two main activities that contribute to membrane efficiency and lifetime are membrane pretreatment and membrane maintenance. Maintenance may be further differentiated into periodic backwashing and ...

  • Membrane cleaning skids prolong operating life of costly membrane filtration units

    Considered one of the most important and costly components of a reverse osmosis purification system, membrane filtration elements (a thin semi-permeable layer which desalinates seawater) collect mineral buildup, organic materials and bacterial agents. The Lifestream Membrane Cleaning Skid cleans, flushes out and preserves the membrane, reviving efficiency and prolonging membrane life.Designing a ...

  • Enhanced membrane bioreactor process without chemical cleaning

    In membrane bioreactors (MBR) for wastewater treatment, the separation of activated sludge and treated water takes place by membrane filtration. Due to the small footprint and superior effluent quality, the number of membrane bioreactors used in wastewater treatment is rapidly increasing. A major challenge in this process is the fouling of the membranes which results in permeability decrease and ...


    By IWA Publishing

  • Air bubbles enhance membrane cleaning: a future perspective

    Abstract Air bubbles generated using a novel micro-bubble generator have displayed a dramatic enhancement in cleaning efficiency when used in conjunction with specially formulated cleaning chemicals. In order to establish the effect of this application on membrane performance, a series of experiments were conducted using both a flat sheet test rig and a small scale pilot plant. ...

  • Self-Cleaning Pre-Filtration for RO Membrane Systems

    ABSTRACT A few years ago physical processes could only remove suspended solids from a water stream. Recent advances in technology now allow the removal of selected molecules and ions from a water stream by physical means using membranes. The membrane process has recently become very efficient and economically feasible for many industrial, commercial, municipal and even residential customers. ...

  • Membrane chemical cleaning: why is it required and how is it performed?

    Membrane fouling, defined as the accumulation of particles and organic matter at the surface or in the pores of membranes occurs during membrane filtration. Membrane fouling results in membrane performance loss, i.e. lower rejection values, lower permeate flux and higher pressure drop, which translates into higher operational cost. The extent of fouling depends on the feed quality, operating ...


    By Sterlitech Corporation

  • Forward osmosis membrane fouling and cleaning for wastewater reuse

    Membrane fouling properties and different physical cleaning methods for forward osmosis (FO) and reverse osmosis (RO) laboratory-scale filtration systems were investigated. The membrane fouling, with respect to flux reduction, was lower in FO than in RO when testing an activated sludge effluent. Cross-flow velocity, air-scouring, osmotic backwashing and effect of a spacer were compared to ...


    By IWA Publishing

  • Microbubble RO membrane cleaning reduces fouling on WWRO plant.

    Over the last ten years there have been significant developments in new devices for energy recovery, new membrane materials, and new sizes and orientations of reverse osmosis (RO) plants, all designed to reduce costs and improve efficiency. The fundamental issue of keeping membrane surfaces clean to ensure efficient RO plant operation has seen relatively few recent developments. This is ...

  • Self-Cleaning Pre-Filtration for RO and Other Membrane Systems

    Abstract A few years ago physical processes could only remove suspended solids from a water stream. Recent advances in technology now allow the removal of selected molecules and ions from a water stream by physical means using membranes. The membrane process has recently become very efficient and economically feasible for many industrial, commercial, municipal and even residential customers. ...

  • A clean sweep

    When properly selected and applied, oil skimmers are a highly economical solution for sepaeating oil from water to allow its reuse or safe disposal. How Oil SkimmersWorkOil skimmees are simple, dependable and effective tonis for removing oil, grease and otherhydroearbono from water and can pay for themselveo within a few months.  Ah oil skimmers rely on the fluid properties of specific ...


    By Abanaki Corporation

  • Atomic force microscopy (AFM) analysis of cleaned and fouled nanofiltration membranes

    In membrane process industries, membrane cleaning is one of the most important concerns from both economical and scientific points of view. Surfaces roughness and phase angle of virgin and fouled membranes were measured and compared before and after chemical cleaning by using atomic force microscopy (AFM). Correlations between the data obtained by this technique (AFM) with the flux and rejection ...


    By Inderscience Publishers

  • Self-Cleaning Filters for Pretreatment of Membrane and UV Water Treatment Systems

    The removal of suspended solids is necessary to protect membrane systems and prevent the “shadow effect” in ultraviolet (UV) treatment systems. Recent field data has shown the effectiveness of automatic self-cleaning filters in removing suspended solids down to less than 3 microns in size without flocculants, pre-coats or granulated media. Tests have demonstrated the complete removal of particles ...

  • A Membrane Pretreatment Technology

    Nearly all membrane systems, no matter what their raw water source, must utilize some form of pretreatment to remove unwanted organic and inorganic suspended solids. Bag and cartridge filters are efficient at removing suspended solids but must be replaced on a frequent and often costly basis. Some form of suspended solids removal system that cleans itself, maintains high flow rates and stays ...

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