CASE STUDIES AND WHITE PAPERS

City Of Springfield, MO, Upgrades Disinfection System From Gas Chlorine To On‐Site Sodium Hypochlorite Generation
City Of Springfield, MO, Upgrades Disinfection System From Gas Chlorine To On‐Site Sodium Hypochlorite Generation

In April 2013, City Utilities started up three Microclor Model MC‐1500 skid systems, each rated at 1,500 pounds per day of free available chlorine.

Removing Hexavalent Chromium From Groundwater Supplies
Removing Hexavalent Chromium From Groundwater Supplies

The chromium removal pilot study was conducted for the County of San Bernardino, CA at their CSA 70 Zone J - Well 5 treatment facility. Chromium in the CSA 70 Zone J – Well 5 raw water source exceeds the current Maximum Contaminant Levels (MCL).

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CONTAMINANT REMOVAL PRODUCTS

Filter Inspection And Media Replacement Filter Inspection And Media Replacement

Annual filter inspections are a key component to long term, trouble free filter operation. Loprest’s trained service engineers can inspect your treatment system and provide written recommendations for maintenance, improvements and upgrades to keep your filter system operating at its peak performance.

SYNCRO-CLEANSE® SYNCRO-CLEANSE®

Further reduction of the volume of backwash water requirements can be achieved with the application of the Loprest SYNCRO-CLEANSE® process. This patented design utilizes both air and water for a more efficient backwash operation.

Contaminant Removal Contaminant Removal

With 90 years of water treatment experience, Loprest has the expertise to design an effective treatment process for your water treatment challenges.  From basic filtration and ion exchange to multiple contaminant applications, challenge Loprest for an economic, effective solution of your water quality compliance issue.

Liquid Analytical Measurement Liquid Analytical Measurement

Environmental protection, consistent product quality, process optimization and safety –​ just a few reasons why liquid analysis is becoming increasingly essential. Liquids such as water, beverages, dairy products, chemicals and pharmaceuticals have to be analyzed day in and day out. We support you in fulfilling all these measuring tasks with application know-how and cutting-edge technologies. Discover our comprehensive portfolio and choose the product best suited to your process needs.

Pipeline Flash Reactor Plus (PFR+) Pipeline Flash Reactor Plus (PFR+)

Today’s high dosage ozone systems, such as those required by water reuse projects, place extraordinary energy and mixing demands on ozone mass transfer. Mazzei utilized multiphase computational fluid dynamics (CFD) analyses to develop the new PFR+ to address these challenges.

Pressure Filters Pressure Filters

Loprest pressure filters can be provided in horizontal or vertical vessel configurations for flow rates from 50 to 5,000 GPM. The Loprest multi-cell pressure filter design produces its own backwash water, so there is no need for a separate treated water source and pumping system. The Loprest filter design has been optimized over many years for reliable, efficient, economical operation. All Loprest treatment systems are operated by a fully automated control package.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

Coconut Shell Activated Carbon For Removing PFOA And PFOS Coconut Shell Activated Carbon For Removing PFOA And PFOS

Coconut shell activated carbon is typically used for filtration in cleaner waters. Its alternatives are coal-based or wood-based carbon. With the recently published EPA guidelines on perfluorinated compounds, Water Online Radio sat down with Neal Megonnell, Senior Vice President for Haycarb USA, to understand coconut shell activated carbon’s application in fighting PFOA and PFOS.

Getting Chlorine Disinfection Right Getting Chlorine Disinfection Right

Of all the process considerations facing wastewater treatment operators, disinfection is one of the most important. In this exclusive Water Talk interview, Gary Lohse, Technical Sales Manager, Disinfection with De Nora Water Technologies, discusses how disinfection has become increasingly complex over time. Lohse reviews a host of selection criteria including target microorganisms, control strategies, disinfection by-products, capex and safety.

UV-LED Technology: The Latest In Disinfection UV-LED Technology: The Latest In Disinfection

Dan Shaver, Business Development Manager at Aquionics, talks about the advantages of UV-LED technology for disinfection: low energy requirements, chemical-free and customizable design, and proficiency in solar or battery-powered applications.

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.

The Pros And Cons Of Ion Exchange Versus Membrane Technology The Pros And Cons Of Ion Exchange Versus Membrane Technology

Frank Caligiuri, Sales Manager for Hungerford & Terry, discusses the merits of ion exchange versus membrane technology with a focus on the constituents being removed

PAA And UV Pair Up To Improve Disinfection Performance PAA And UV Pair Up To Improve Disinfection Performance

Peracetic acid (PAA)-based disinfection is growing in the US, both as a standalone disinfection method and in conjunction with other applications such as UV. Water Online Radio sat down with John Maziuk, Technical Development Manager with Solvay Chemicals to understand why.

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CONTAMINANT REMOVAL VIDEOS

Fluoride Saturator and Feed System Video Fluoride Saturator and Feed System Video

The IMS Fluoride Feed System is designed with separate saturator and solution tanks to ensure complete saturation, high reliability, low maintenance, and ease of use. Systems are sized to meet customer requirements.

The ozonia Innovation Labs Have Set The New Standard For Ozone Technology The ozonia Innovation Labs Have Set The New Standard For Ozone Technology

The newest family in the SUEZ ozone range, the ozonia® M includes all the latest developments from the ozonia® innovation labs. Ozonia® IGS+ dielectric technology provides even lower energy consumption and increased ozone production capacity up to 25 kg/h resulting in a lower cost per kg of ozone. The new ozonia® smartO3™ automation platform adds a suite of advanced features designed to optimize system performance and reduce operation costs. Finally, an innovative design provides improved resistance to environmental conditions in a more compact footprint.

Salsnes Delivers Fully Automated, Compact Filter Technology

Jorn Eliassen of Salsnes Filter, now part of TrojanUV, provides a detailed description of the company’s flagship product, which is presented as a low-cost option to a conventional primary clarifier. The system offers separation, thickening, and dewatering in one unit, features a small footprint, and is suitable for a variety of applications.

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ABOUT

The removal of contaminants from public drinking water systems in the US is mandated by the Environmental Protection Agency’s (EPA) National Primary Drinking Water Regulations. These are legally enforceable standards that protect public health by limiting the levels of contaminants in drinking water. Similar regulations are managed by agencies worldwide to protect their citizens from drinking water contamination.

There are a plethora of drinking water contaminant removal technologies that public and private water systems use to comply with the EPA’s drinking water regulations. These include reverse osmosis, membrane, nanofiltration, ultrafiltration, chlorine disinfection, UV disinfection and Ozone-based disinfection practices.

The EPA’s list of drinking water contaminants is organized into six types of contaminants and lists each contaminant along with its Maximum Contaminant Level (MCL), some of the potential health effects from long-term exposure above the MCL and the probable source of the drinking water contaminant.

The six types of contaminants are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.

Examples of microbiological, organic contaminants are Cryptosporidium and Giardia lamblia. Both of these microorganic pathogens are found in human or animal fecal waste and cause gastrointestinal illness, such as diarrhea and vomiting.

A common disinfectant used in municipal drinking water treatment to disinfect microorganisms is chlorine. The EPA’s primary drinking water regulations require drinking water treatment plants to maintain a maximum disinfectant residual level (MDRL) for chlorine of 4.0 milligrams per liter (mg/L). Some of the detrimental health effects of chlorine above the MCL are eye irritation and stomach discomfort.

Similarly, byproducts from the chlorine-based disinfection methods used by public water systems to remove contaminants can be contaminants in their own right if not removed from the drinking water prior to it being released into the distribution system. Examples of disinfection byproducts include bromate, chlorite and total trihalomethanes (TTHMs). Not removed from drinking water, these disinfection byproducts can increase risk of cancer and cause central nervous system issues.

Chemical contamination of drinking water can be caused by inorganic chemicals such as arsenic, barium lead, mercury and cadmium or organic chemicals such as benzene, dichloroethane and other carbon-derived compounds. These chemicals get into source water through a variety of natural and industrial processes. Arsenic for example is present in source water through the erosion of natural deposits.  Many of the chemical contaminants are derived from industrial wastewater such as discharges from petroleum refineries, steel or pulp mills or the corrosion of asbestos cement water mains or galvanized pipes.

Radium and uranium are examples of radionuclides. Radium 226 and Radium 228 must be removed to a level of 5 picocuries/liter (PCI/L) and Uranium to a level of 30 micrograms/liter (30 ug/L).