inorganic filter membrane Articles

  • Efficient Removal of Organic and Inorganic Suspended Solids

    ABSTRACT The Romans used sand as a filter media to treat their drinking water 2000 years ago. Centuries ago water was poured through layers of cloth to remove visible impurities in drinking water with fabric bags and paper cartridges soon following. Darcy employed sand beds in Dijon, France over 200 years ago to conduct his experiments for developing his famous equation to describe fluid flow ...

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Experimental investigation of inorganic nanofiltration membranes prepared by atomic layer deposition and sol–gel methods for saltless water softening

    This study explored saltless water softening with inorganic Nanofiltration (NF) membranes prepared by Atomic Layer Deposition (ALD) and a Tetraorthosilicate (TEOS) sol–gel process applied by the slip cast method. The experimental investigations were performed on different material–based inorganic NF membranes, including titanium dioxide (TiO2), alumina (Al2O3), silver ...


    By Inderscience Publishers

  • 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 ...

  • Membranes, the Finest Filtration

    Introduction The notion that salt could be removed from seawater without a phase change took hold of Dr. Sourirajan's imagination in the late 1950's. The actual invention of the reverse osmosis (RO) membrane took place in his laboratory at UCLA around 1960. (Thus Sourirajan could be called not only the 'Father of Reverse Osmosis,' but the initiator of all crossflow membrane technology.) The full ...


  • Treating Industrial Water with Membrane Technology

    A variety of industries are finding that it makes sense to reevaluate the way they treat industrial process water, both to improve the quality of their products and increase the efficiency of their processes. Purification systems utilizing crossflow membrane filtration, such as reverse osmosis (RO), nanofiltration (NF) or ultrafiltration (UF) can be a good alternative to traditional filtration ...


  • 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 ...

  • Crossflow Membrane Filtration High-Purity Water Systems

    INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

  • Two-pass Combined Membrane Reverse Osmosis Water Treatment

    There are several options in designing two-pass reverse osmosis systems, using the predominant membranes currently on the market: PA (polyamide) or CA (cellulose triacetate) membranes. Combining cellulose triacetate and polyamide membranes in the first and second passes, respectively, is just one approach that offers some interesting advantages, but it may not necessarily be suitable for all ...

  • Membrane Bioreactors for Industrial Wastewater Treatment: Applicability and Selection of Optimal System Configuration

    ABSTRACTThe membrane biological reactor (MBR) configuration has proven to be optimal for treatment of many industrial wastewaters when treatment efficiency is an important consideration. Since installation of the first large, U.S., full scale MBR system for industrial wastewater treatment at the General Motors plant in Mansfield, Ohio in the early 1990s, use of membranes for biomasseffluent ...

  • Two Case Histories of Industrial Water Reuse Via Membrane Technology

    Abstract This paper describes two successful applications of ultrafiltration (UF) and reverse osmosis (RO) membrane technology used to reclaim water, reduce waste water discharge costs. The first case history covers oily waste water treatment at a major aluminum beverage can manufacturing plant. The second case describes treatment of waste water from a multi-plating bath section of a major ...


  • Particle removal efficiency of Nano alumina fiber filters

    A 2 nanometer alumina fiber is combined with a microglass fiber to produce a nonwoven filter. Its pore size is 2 microns, yet it is functionally rated at 0.03 microns. Data are presented showing dirt holding capacity and filtration efficiency for particles from 0.001 to 7 microns. The filters have high retention for micron size silica dust, bacteria, virus, DNA/RNA, tannin and latex spheres. ...


    By Argonide Corporation

  • Influence of water compositions on fouling of plane organic membrane in frontal filtration: application to water and wastewater clarification

    The aim of this study was to evaluate and quantify the filterability of suspended/soluble organic and suspended inorganic matter in a condition without and with chemical conditioning on membrane fouling using cake filtration model. The experiments were conducted with different feed water concentrations under a given TMP (0.2 to 0.5 bar). The fouling potential was examined and described in terms ...


    By IWA Publishing

  • Case study: TOC recovery studies comparing combustion/NDIR with UV-persulfate/membrane conductometric methods for municipal raw and finished drinking water monitoring

    Objective Numerous studies have been conducted to compare the performance of various TOC methodologies on a wide range of raw source water and finished drinking water samples. The methodologies studied are those that are approved for TOC monitoring under the USEPA’s Disinfectants and Disinfection Byproducts Rule (D/DBPR). The results of these studies demonstrate that ...


    By GE Analytical Instruments

  • VSEP recovers pigment and provides filtrate that exceeds discharge requirements

    New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) system in October, 1997 at Dominion Colour, a major international inorganic pigment manufacturing facility in Canada. VSEP is used for treatment of a chromate batch solution at this facility. The VSEP system uses an ultrafiltration membrane module to treat pressate from the filter press operation in order to recover ...


    By New Logic Research, Inc.

  • VSEP recycles used motor oil at 90°C providing a filtrate suitable for use as marine grade diesel fuel or lube oil feedstock

    A unique membrane filtration system was installed in July 2001 at a major waste oil re-refining operation in Portland, Oregan. The system manufactured by New Logic Research, Inc. of Emeryville, California near San Francisco, is being used to process used crankcase waste oil and produce filtrate that can be sold as a higher value bunker oil. The V��SEP, (Vibratory Shear Enhanced ...


    By New Logic Research, Inc.

  • Update on Mt Pleasant WTP Incorporating the MIEX ® DOC Process and How it Compares With a Plant Operating in Enhanced Coagulation Mode

    Natural organic matter (NOM) is a major factor impacting on water treatment processes. NOM is a precursor of disinfectant by-products (DBP), a food source for regrowth of micro-organisms and makes downstream processes such as membrane filtration and activated carbon less efficient. Reducing NOM in conventional treatment plants can be achieved by using enhanced coagulation, whereby additional ...


    By IXOM Watercare

  • RO Pretreatment Hydrocarbon Engineering - Optimisations of Osmosis

    Desalination by reverse osmosis (RO) is a fast growing technology, which is gaining more and more market share in the field of desalination applications. RO plants are able to produce extremely pure water with minimal impurities, even if they are charged with highly contaminated feed water. Based on the fact that the RO membranes themselves are able to separate the smallest ions out of the raw ...


    By Kurita

  • Yucaipa, CA - case study

    The Challenge - Upgrade In 2007 the Yucaipa Valley Water District in Yucaipa, CA upgraded their Activated Sludge treatment plant to a Kruger AnoxKaldnes Biofilm + Activated Sludge (HYBAS) process. The plant expansion was driven by an increase in hydraulic loading and a new Total Inorganic Nitrogen Limit that was lowered from 10 mg/L to 6 mg/L. Process Solution The process flow scheme includes ...

  • Methods of Water Purification

    This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface water or groundwater. The majority of public or ...

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