DRINKING WATER FILTRATION CASE STUDIES AND WHITE PAPERS

The 'First Line Of Defense' In Protecting Membrane Filters
The 'First Line Of Defense' In Protecting Membrane Filters

Multi-element, self-cleaning pretreatment filters optimize membrane filter life and production while minimizing maintenance and downtime.

  • California Dreamin’? Pilot Study Makes Treating Arsenic, Manganese And Iron A Reality
    California Dreamin’? Pilot Study Makes Treating Arsenic, Manganese And Iron A Reality

    The City of Paramount conducted a pilot study for arsenic, manganese and iron treatment system at their Well 15 site. The onsite pilot test was designed to demonstrate the performance of the Loprest Water Treatment Company treatment process proposed for the new treatment plant.

  • Pilot Test For Manganese Removal Using Manganese Greensand
    Pilot Test For Manganese Removal Using Manganese Greensand

    Loprest has been designing and fabricating manganese removal systems using manganese greensand for over forty years. Drawing on that experience; filtration rates, run times, backwash procedures, chemical dosage rates, etc. are all established by theoretical calculations and history. Therefore, Loprest’s goal in this pilot study was to conduct uninterrupted operation per bid testing procedures and document the results.

  • Is Coagulation Followed By Filtration Viable To Remove Arsenic When Raw Water Arsenic Levels Are High?
    Is Coagulation Followed By Filtration Viable To Remove Arsenic When Raw Water Arsenic Levels Are High?

    The objective of the pilot study was to demonstrate “proof of concept” if coagulation followed by filtration was a viable technology to remove arsenic in water from Well No. 6 when raw water arsenic levels are so high, >70 ppb. Preparations were made to reduce the pH of the raw water if it was required. Also, two unique arsenic adsorptive medias were evaluated as a final polishing step to the effluent of the coagulation/filtration process.

  • Removing Iron, Arsenic and Manganese To Meet California Regulations
    Removing Iron, Arsenic and Manganese To Meet California Regulations

    Water from Well 19 and 20 in Sacramento, California area was high in manganese and arsenic. Due to the high levels, the wells were not being used to supply municipal water to the District. Each facility is planned to initially produce and treat approximately 600 gpm with a future expansion capacity to 1200 gpm.

  • Philippines Potable Water System Improvement Project Uses Filter Underdrain Blocks To Improve Backwash Efficiency
    Philippines Potable Water System Improvement Project Uses Filter Underdrain Blocks To Improve Backwash Efficiency

    Founded in 1997, the Manila Water Company (MWC) serves the potable water needs of more than five million residents of the Philippines capital and cities to the east. The company serves as the private partner in a public-private partnership with the Philippines government in operating the Metropolitan Waterworks and Sewerage System for Metro Manila’s East Zone.

  • A Pilot Study Involving Three Different Treatment Media
    A Pilot Study Involving Three Different Treatment Media

    As part of a feasibility study for arsenic treatment at an elementary school in California, a pilot study was conducted to test the performance of three different treatment media: (1) greensand and anthracite, (2) standard sand and anthracite, and (3) manganese dioxide.

  • Dual Parallel Lateral Filter Underdrains Selected To Replace Underperforming Nozzle Design At Mexico's Largest Drinking Water Treatment Plant
    Dual Parallel Lateral Filter Underdrains Selected To Replace Underperforming Nozzle Design At Mexico's Largest Drinking Water Treatment Plant

    Located about 78 miles (125 kilometers) west of Mexico City lies the municipality of Villa de Allende, home of Mexico’s largest potable water treatment plant. The Los Berros water treatment plant was constructed in 1980 by the National Water Commission (Conagua), an agency of the Mexican government that manages the nation’s drinking water and wastewater treatment. The plant provides 396.3 million gal/day (1.5 billion L/day) of water to the country’s capital city, equivalent to approximately 25 percent of the total water supply of the western hemisphere’s most populace metropolitan area.

  • Arsenic Removal Pilot Study Meets California Standards
    Arsenic Removal Pilot Study Meets California Standards

    Well water from several locations in Ridgecrest, California area is high in arsenic, carbonates and pH. Due to the high levels of arsenic, some wells are not being used to supply municipal water to the city of Ridgecrest and were shutdown. Due to local demand, the feasibility of treating these wells to remove most of the arsenic before blending with water from other wells is being investigated.

  • Four Day Pilot Study For Iron And Manganese Does The Trick
    Four Day Pilot Study For Iron And Manganese Does The Trick

    The City of Southgate, California wanted to investigate the effect of replacing the existing media in their Well 27 treatment plant. The plant would not reduce the incoming manganese levels to below the 50 μg/l MCL. It has been theorized that the existing media has become fouled beyond cleaning during the one year plus of non-operation while contained in the filter tank full of water. That environment could produce a likely source of biological and other sources of fouling.

Pilot Test For Arsenic, Color And Iron Shows Great Results
Pilot Test For Arsenic, Color And Iron Shows Great Results

The City of Riverdale was running into issues with arsenic, color and iron treatment system at their Well 4 site, so they conducted a pilot test with the help of Loprest.

More Case Studies and White Papers

DRINKING WATER FILTRATION PRODUCTS

Leopold® FilterWorx® Performance Filters Leopold® FilterWorx® Performance Filters

FilterWorx performance filters from Leopold are designed to achieve filtration cycles that meet your permit requirements. They are suited for applications such as potable drinking water treatment, tertiary wastewater treatment, nutrient removal in water or wastewater, pretreatment prior to low-pressure membrane systems, and RO membrane desalination pretreatment. Download the brochure to learn how the components can help you integrate a cost-effective, energy-efficient, high-performance filtration system.

aquasource™ Z-XS: Ultrafiltration Membrane Systems aquasource™ Z-XS: Ultrafiltration Membrane Systems

aquasource Z-XS is a highly compact ultrafiltration unit able to adapt to your raw water source with its comprehensive yet easy-to-use automation. Featuring up to 4 membrane modules ZW700B, the aquasource Z-XS is a packaged unit that can produce up to 350 m3/day of clarified and sanitized water from surface, ground, city- or seawater.

SuperSettler™ Featuring The ZICKERT Shark™ SuperSettler™ Featuring The ZICKERT Shark™
The efficient design of the SuperSettler™ Lamella Plate Clarifier utilizes lamella plates and shallow depth sedimentation to minimize the clarifier footprint.
Tube Settlers Tube Settlers

Need to speed up your settling process? Brentwood tube settlers can help you do that while also improving overall plant efficiency for potable water and wastewater applications. By expanding settling capacity, Brentwood tube settlers increase flow rates and improve effluent water quality. They also save you money on operating costs by reducing the frequency of filter backwashing.

Don’t pay double for steel. Go blue!

Filtration: Heavy Suspended Solids Filtration - Electromedia® III Filtration: Heavy Suspended Solids Filtration - Electromedia® III
Electromedia III removes heavy suspended solids from water having up to 200 p.p.m. contaminants
Resinex Ion Exchange Resins Resinex Ion Exchange Resins

In many water treatment and food purification applications, activated carbon is used in conjunction with ion exchange resins to provide an end-product of the desired quality and purity.

Arsenic, Iron, And Manganese Removal By Filtration Arsenic, Iron, And Manganese Removal By Filtration

Removal of Arsenic, Manganese, Iron, Fluoride, Radium and other Heavy Metals is a constant challenge for water purification plants.

Process Automation Process Automation

Festo is a leading global manufacturer of automation technology including systems, components, and controls for process control and factory automation solutions.

More Products

DRINKING WATER FILTRATION PODCASTS

Ozonia M and FiltraFast Provide New Options For Treatment Facilities Ozonia M and FiltraFast Provide New Options For Treatment Facilities

If you don’t need the performance of an ultrafiltration membrane but also want to avoid the large footprint of a conventional media filter, you might want to consider FiltraFast extreme rate compressible media filters. As Ryan Hess, Director of Advanced Separation with SUEZ Water Technologies suggests in this Water Talk interview, “They provide roughly ten times the hydraulic loading rate of conventional media filters.”

Water Quality Comes Under The Consumer Microscope Water Quality Comes Under The Consumer Microscope

Water quality is getting a lot more scrutiny these days. And that’s a good thing says Russ Swerdfeger, Global Director of Memcor Product Management with Evoqua. Alongside his colleague Daryl Weatherup, Director of Marketing with Evoqua, Swerdfeger recently discussed the future of drinking water and the key issues and concerns facing the water industry right now with Water Talk.

Treatment Alternatives For PFCs Treatment Alternatives For PFCs

Over the past two years, no groundwater issue has perhaps received as much community focus and attention as polyfluoroalkyl and perfluoroalkyl substances like PFOA and PFOS, often referred to as perflourinated compounds (PFCs). The U.S. EPA issued a health advisory, limiting the amount of these compounds to 70 parts/trillion which kicked off a nationwide evaluation of local water sources.

De Nora Doubles Down On Innovation De Nora Doubles Down On Innovation

With 29 locations, 1,600 employees and research facilities in Japan, Italy and the United States, DeNora is one of the largest disinfection and filtration companies in the world. As Gary Lohse, Regional Sales Manager for De Nora, explains in this Water Online Radio interview, the acquisition of the former Severn Trent manufacturing division coupled with De Nora’s product innovation strength is driving enhancements to some of the most respected brands in the water industry.

Selecting The Right Membrane For The Job Selecting The Right Membrane For The Job

In this Water Online Radio exclusive interview, Fred Wiesler, Global Director of Sales for the QUA Group, discusses some of the company’s key products, including the EnviQ that uses a flat sheet PVDF membrane, and has a .04-micron pore size. It provides ultrafiltration quality water, with the strength of a PVDF flat sheet membrane.

High Flux Rates Reduce Energy Footprint Of Membrane Filtration High Flux Rates Reduce Energy Footprint Of Membrane Filtration

PPG Industries has spent the last four years developing and field testing a membrane-based filtration technology that has arrived in the market as both a flat sheet and a spiral on filter cartridge.

More Drinking Water Filtration Podcasts

DRINKING WATER FILTRATION VIDEOS

SiC Strength: Silicon Carbide Membranes SiC Strength: Silicon Carbide Membranes

Silicon carbide, or SiC, membranes are made from one of the earth's hardest natural materials, making them extremely strong and resilient. They are also hydrophilic, lending to a high flux rate (4 to 6 times that of other membranes) and making them particularly suitable for stormwater/CSO applications.

DE NORA TETRA: Trusted Filtration Technologies DE NORA TETRA: Trusted Filtration Technologies

De Nora brings a long history of innovation to familiar water treatment technologies like DE NORA TETRA filtration products. For more than 55 years, De Nora has been providing filtration process expertise and global innovation with DE NORA TETRATM Denite® denitrification systems, DeepBed™ tertiary AWT filters, underdrains for water and wastewater treatment, and submerged aerated biological filters.

MRI Inclined Plate Settler System Video - Treating More Water in Less Space MRI Inclined Plate Settler System Video - Treating More Water in Less Space

This video provides a detailed explanation of the process and benefits of the MRI Inclined Plate Settler System over conventional settling methods. MRI’s Inclined Plate Settlers and Hoseless Cable-Vac Sludge Collectors combine in this system to provide a reduced footprint, cost savings, zero energy usage, and superior efficiency and effluent quality.  

More Videos

DRINKING WATER FILTRATION SUPPLIERS

  • Filtronics, Inc.
    Filtronics, Inc.

    Filtronics has manufactured water and waste water treatment systems for industrial and municipal applications since 1974

  • 3M Separation and Purification Sciences Division
    3M Separation and Purification Sciences Division

    3M Liqui-Cel Membrane Contactors are used for degassing liquids. They are most commonly used for O2 removal from water and CO2 removal from water, but they are also capable of controlling a variety of other dissolved gasses as well, such as Nitrogen.

  • WRT - Water Remediation Technology, LLC
    WRT - Water Remediation Technology, LLC

    WRT provides effective processes for removing radium, uranium and other contaminants from water. Our complete package of services includes process equipment, proprietary treatment media, safe exchange of media, and proper handling and disposal of used media

  • Ovivo
    Ovivo

    Ovivo brings together more than 200 years of collected experience, process expertise and proven technologies; but that doesn’t mean that we’re complacent. Over past centuries of growth, development and refinement we have been guided by the principle of delivering value to our clients. Our equipment and technologies already have a reputation for long-term durability and reliability, offering decades of use and leading to lasting relationships with key customers.

  • AdEdge Water Technologies, LLC.
    AdEdge Water Technologies, LLC.

    AdEdge Technologies, Inc specializes in the development and supply of innovative technologies, adsorbent-based products, and systems that remove contaminants from process or aqueous steams. We are an organization based on solid deliverable, scalable, scientifically proven technology and experience for the removal of arsenic and other contaminants from water

  • Aqua-Aerobic Systems, Inc.
    Aqua-Aerobic Systems, Inc.

    Since 1969, Aqua-Aerobic Systems, Inc. has been a leader in the design and manufacture of wastewater treatment equipment and systems for both municipal and industrial markets, worldwide.

  • Aquatech International Corporation
    Aquatech International Corporation For over 2 decades, Aquatech has provided industry worldwide with proven water and wastewater treatment systems|We strive to enable our customers to maximize efficiency by concentrating on their core businesses while we provide the leadership and expertise necessary in water treatment|Our mission is to utilize innovation and performance excellence to drive toward the ultimate goal--a lower overall life cycle cost of treatment
  • De Nora
    De Nora

    De Nora Water Technologies is a leading supplier of water and wastewater treatment solutions. We provide our clients with some of the industry’s brightest minds, advanced technologies, and quality products to provide you with truly efficient, cost-effective solutions to your water and wastewater challenges

  • Leopold -- A Xylem Brand
    Leopold -- A Xylem Brand

    Leopold Universal Type S and SL Underdrain|Leopold IMS Cap|Leopold DAF - Dissolved Air Flotation|Leopold Clari-Trac (CT2) Submerged Sludge Collector|Leopold Clari-Vac Floating Sludge Collector|Leopold Engineered Filter Media Products|Leopold Instruments And Controls| Leopold Ultrafiltration Membrane Systems

  • QUA Group LLC
    QUA Group LLC

    QUA® is a leading-edge developer and manufacturer of advanced membrane products, which includes fractional electrodeionization (FEDI) and hollow fiber ultrafiltration module (Q-SEP). These are engineered with innovative technologies, which are used to treat challenging waters. QUA is leveraging its deep roots in R&D, the expertise of staff that is highly experienced in water treatment technologies, and its significant financial resources to become a global technology leader in the development of products for water and wastewater treatment applications.

  • Shelco Filters
    Shelco Filters

    Manufacture of filter housings and elements|Pleated membrane and high efficiency cartridges|Bag housings and bags

  • Amiad Water Systems
    Amiad Water Systems

    Amiad Water Systems is a world leader in water filtration equipment and treatment solutions.

    For over 50 years Amiad has been committed to developing a comprehensive line of robust water filtration equipment and integrated treatment packages for water applications in the industrial, municipal (potable and wastewater), oil and gas, commercial HVAC, ballast water, agriculture, irrigation, and aquaculture markets. Our filters are in use in over 70 countries around the world. Every Amiad system is built for efficiency, effectiveness and reliability and is backed by our commitment to excellence and dedication to customer service.

  • Evoqua Water Technologies
    Evoqua Water Technologies

    Evoqua Water Technologies, formerly Siemens Water Technologies, is a leader in water and wastewater treatment products, systems and services for industrial and municipal customers. We offer a wide range of proven product brands and advanced water and wastewater treatment technologies, mobile and emergency water supply solutions and service contract options.

  • SUEZ – Water Technologies & Solutions
    SUEZ – Water Technologies & Solutions

    SUEZ is a global integrated group focused on the management of water and waste resources. On five continents, SUEZ supports municipalities and industries in the circular economy to maintain, optimize and secure the resources essential for our future.

  • Veolia Water Technologies
    Veolia Water Technologies

    Veolia Water Technologies offers comprehensive water and wastewater solutions for industrial and municipal customers. With unique technologies and process expertise, Veolia specializes in engineering, design, and project management, construction and execution.

ABOUT DRINKING WATER FILTRATION

 

Water treatment filtration involves the removal of suspended particles from water by passing the water through a filtration medium. As the water passes through the filter, floc, minerals, microorganisms and other impurities get stuck in the filter and are removed from the filtered water. Passage can be blocked by physical obstruction, biological action, adsorption, absorption or a combination of ways. Filtration is usually the final step in the solids removal process during water treatment which typically begins with coagulation and advances through flocculation and sedimentation.  

Unfiltered or turbid water is difficult to disinfect because microorganisms growing on suspended particles are often harder to kill than when they are separated from the particles. Turbidity can also cause unwanted taste and odor issues in the potable water supply. Drinking water filtration is also used to remove microorganisms that are resistant to traditional methods of disinfection such as chlorination. By requiring a low turbidity in finished water, water treatment plants are ensuring that few or no microorganisms such as Giardia are present in finished drinking water.

There are three typical methods of clean water filtration used during the water treatment process. Conventional filtration follows coagulation, flocculation and sedimentation and precedes disinfection. Direct Filtration follows coagulation and flocculation when there is no sedimentation step. The final method called In-Line Filtration takes place without flocculation or sedimentation. A coagulant chemical is added to the water just before filtration and coagulation occurs in the filter. 

 There are many types of filter media being used in today’s water treatment industry.