• The Leader in Membrane Separation processes

  • The Leader in Membrane Separation processes

    Pressure Driven Membrane Processes (MF/UF/NF/RO)

    LPE is a leading expert in pressure driven membrane processes (MF/UF/NF/RO) process in Thailand, with decades of hands-on experience in the design, fabrication, and implementation of water treatment systems utilizing pressure-driven membrane technologies. We are proud to be among the first Thai companies to independently design and install full-scale Reverse Osmosis (RO) systems within the country. This achievement laid an important foundation for the adoption and application of membrane filtration technologies across a wide range of industries, including Food & Beverage, Pharmaceuticals & personal care products, power plants & petrochemicals and microelectronics.

    Pressure Driven Membrane (MF/UF/NF/RO)

    what pressure driven membrane processes (MF/UF/NF/RO) is...

    Pressure driven membrane processes (MF/UF/NF/RO) filtration uses hydraulic pressure and a semi-permeable membrane to separate a feed stream into permeate and retentate. Separation occurs through size exclusion and solute–membrane interactions, enabling effective removal of suspended and dissolved components—especially.

    Dead-end filtration involves feed flowing perpendicular to the membrane surface, where solids accumulate as a cake layer, causing faster fouling. In contrast, cross-flow filtration has feed flowing tangentially along the membrane surface, generating both permeate and concentrate streams, while shear force helps sweep particles away, resulting in slower fouling.

    The Filtration Spectrum: Pressure vs. Selectivity

    Each type of membrane—Microfiltration (MF), Ultrafiltration (UF), Nanofiltration (NF), and Reverse Osmosis (RO)—targets different particle sizes and dissolved substances, making them suitable for a wide range of industrial water treatment and process separation applications.

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    Understanding the distinction between the four main types of membranes is essential for selecting the right solution for your application. As the pore size decreases, the required Operating Pressure increases to overcome resistance and osmotic pressure.

    Microfiltration (MF): The Clarity Expert

    Microfiltration acts as the primary physical barrier within the membrane filtration spectrum, designed to remove suspended solids, large biological contaminants, and particulate matter.

    Microfiltration Applications

    • Surface water clarification: efficiently removes silt, clay, and algae from river or lake water sources to produce high-clarity process water.
    • RO/NF Pre-treatment: essential for protecting sensitive Reverse Osmosis (RO) membranes by removing the particulate matter that causes physical fouling, thereby extending membrane life.
    • Food and beverage Industry: used for the clarification of fruit juices, wine, vinegar soy sauce and beer to remove turbidity and sediments while perfectly maintaining the original flavor profile.
    • Dairy Processing:
      • Facilitates the removal of bacteria and mold from milk
      • Separate casein micelles from whey proteins
      • Fat Removal in Whey, producing high-quality Whey Protein Isolates (WPI) and concentrates
      • Brine Treatment: Used in cheese production to remove impurities and bacteria from salt brine

    Ultrafiltration (UF): The Fractionation Specialist

    Ultrafiltration membranes bridge the gap between MF and NF, focusing on the separation of specific molecular weights (MWCO) and high-level disinfection.

    Ultrafiltration Applications

    • Industrial water treatment
      • RO / NF pretreatment
      • Portable water treatment
      • Tertiary wastewater treatment
      • Water reuse and recycling
    • Food & Dairy:
      • Concentration of whey protein, separate protein
      • Peptide fractionation by peptide size
    • Pharmaceutical and Biotechnology:
      • Critical for enzyme recovery, protein concentration, and pyrogen removal during downstream processing

    Nanofiltration (NF): The Selective Filter

    Often called “Loose RO,” NF is unique because it can selectively reject multivalent ions (like Calcium and Magnesium) while allowing some monovalent salts to pass.

    Nanofiltration Applications

    • Industrial water treatment
      • Water softening: removing “hardness” and sulfates from brackish water without the need for chemical salt regeneration
      • Color removal: eliminating organic tannins and color-causing molecules from surface water or wastewater
      • Organic contaminant removal: reduction of dissolved organic compounds, micropollutants, and other contaminants in water treatment processes
    • Food & beverage processing
      • Sugar processing: decolorization and purification of liquid sugar, syrups, and other sweetener streams
      • Peptide separation and concentration: fractionation and concentration of peptides and small proteins in food processing, fermentation, and bio-based product applications.
    • Chemical & industrial processing
      • Dye recovery and concentration: separation, recovery, and concentration of dyes from textile and chemical industry streams
    Pressure Driven Memnrane Processes-LPE-Nanofiltration (NF)

    Reverse Osmosis (RO): The Ultimate Purification

    RO provides the highest achievable rejection level, effectively removing nearly all dissolved solids, salts, and minerals.
    In process applications beyond water treatment, RO can be applied for partial concentration of liquids under ambient temperature conditions,

    • Industrial water treatment
      • Seawater & brackish desalination
      • Demineralized water (DM), deionized water (DI), boiler feed water (BFW)
      • Chlorate, nitrate, nitrite, and bromate removal
      • Wastewater concentration for MLD/ZLD
    • Food & Beverage Processing
      • Juice concentration: concentrating fruit juices at low temperatures
      • Dilute milk concentration
    • Pharmaceutical Industry
      • Purified water (PW) and water for injection (WFI) in the pharmaceutical industry
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