CASE STUDIES AND WHITE PAPERS

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.

Overcoming Operations Challenges For Direct Potable Reuse
Overcoming Operations Challenges For Direct Potable Reuse

The Water Environment & Reuse Foundation introduces a “bundle of research” to help direct potable reuse and its practitioners reach full potential.

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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.

Chemical Feed Systems Chemical Feed Systems

IMS Chemical Feed Systems are pre-assembled, fully-functional chemical delivery systems for water treatment applications. These compact, user-friendly chemical skids include local storage tanks, full secondary containment, dosing pumps, instrumentation and controls. Systems are piped and wired at the factory for easy and quick hook-up.

Carbon Systems Carbon Systems

Loprest designs and manufactures granular activated carbon (GAC) treatment systems for taste and odor applications, chlorine removal, PFC’s, 1 2 3 TCP, PCE/TCE, 1 4 dioxane, and many other contaminants. Loprest has a long, successful history in the selection and application of the proper carbon media for the application.

Injection Skids Injection Skids

Mazzei injection systems are designed using Mazzei’s patented technologies to obtain the most efficient mixing and contacting of air, oxygen, ozone or chemicals into a water stream.

Aqueous Ammonia Feed Systems Aqueous Ammonia Feed Systems

The IMS packaged Aqueous Ammonia Feed Systems include a heavy duty pressure rated aqueous ammonia storage tank, integral ammonia fume scrubber, peristaltic dosing pump, instrumentation and controls in a fully contained, pre-assembled skid.

GDT Mixing & Contacting Systems GDT Mixing & Contacting Systems

The GDT™ Process starts with the creation of ozone from an Ozone Generator. The ozone is then drawn into a Mazzei®Venturi Injector which provides dynamic mixing (a Back Pressure Control Valve adjusts injector outlet pressure optimizing ozone mass transfer in the system). Then mixing and contacting is enhanced in a Flash Reactor™. From there the two-phase flow travels to the Degas Separator (DS) & Relief Valve for additional mixing and entrained gas removal. And finally, the MTM Mixing Nozzles force dissolved ozone flow into the untreated water in the pipeline or basin for thorough mixing.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

How Do You Build A Heavier Floc And Let It Sink And Settle Faster? How Do You Build A Heavier Floc And Let It Sink And Settle Faster?

That’s a question that Jim Georger, regional sales manager with Kruger, a division of Veolia, discussed with Water Online Radio recently.

Polymer Activation And Onsite Hypochlorite Generation Polymer Activation And Onsite Hypochlorite Generation

Polymer activation through proper hydration of the polymer particle is critical in water clarification or sludge dewatering applications. According to Jeff Rhodes, Vice President of Commercial Development for UGSI Solutions, “the key is to have a high energy zone at the moment of initial welding, when the polymer and the water come together.”

Challenges For Water Utilities Spur Technology Upgrades Challenges For Water Utilities Spur Technology Upgrades

Lee Odell, Water Treatment Global Technology Lead at CH2M HILL, discusses some of the current challenges that water utilities are facing and how CH2M HILL is well-poised to address them.

Lighting The Way: Next Steps For UV Disinfection (Audio) Lighting The Way: Next Steps For UV Disinfection (Audio)

With more than 8,500 municipal installations over 40 years, TrojanUV is well-versed in UV disinfection. What’s next for the technology? Adam Festger, TrojanUV’s market manager for drinking water and environmental contaminant treatment, reveals new trends and products to Water Online Radio’s Todd and Kelly.

Will Peracetic Acid Replace Chlorine? Will Peracetic Acid Replace Chlorine?

Chlorine has long been a water treatment staple, but it’s not without its complications. As an alternative, some treatment facilities have been turning to peracetic acid (PAA) and enjoying several key advantages.

The Growth Of A Carbon Company The Growth Of A Carbon Company

Jacobi Carbons Inc., the largest worldwide manufacturer of coconut shell activated carbon, will be celebrating it’s 100th birthday in 2016.

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CONTAMINANT REMOVAL VIDEOS

An Introduction To NeoTech Aqua Solutions An Introduction To NeoTech Aqua Solutions

Whether you’re managing municipal waters, working with cooling towers, or producing clean water, NeoTech Aqua Solutions offers disinfection, TOC reduction, and ozone destruction products that can be easily sized for your requirements.  Real-time dosimetry units provide exact dosage measurements, and a minimum number of lamps allow for halting of water flow without powering the unit down.

5500sc Ammonia Monochloramine Analyzer 5500sc Ammonia Monochloramine Analyzer

The Hach 5500sc Ammonia Monochloramine Analyzer provides all the information you need to eliminate nitrification events and taste and odor issues, giving you total confidence in your process. The analyzer offers an easy to operate, low-maintenance solution with a pressurized reagent delivery system.

WEDECO Duron UV Disinfection System Overview Video WEDECO Duron UV Disinfection System Overview Video

WEDECO Duron is a new, open channel UV disinfection system for clean, safe treated wastewater that minimizes energy and footprint. Designed for mid-size to large open channel systems, the Duron eliminates the need for chemical based disinfection while simultaneously reducing electricity costs and the amount of space required. This video explains the overall function of the product.

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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).