DRINKING WATER TREATMENT
For the unfamiliar, the term “disruptive technology” initially sounds quite bad, as though it describes something that gets in the way. Far from impeding progress, however, disruptive technologies actually accelerate progress exponentially by disrupting the status quo. Think personal computers vs. mainframes, or cell phones vs. land lines.
DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS
Optimized Quality Control In Mineral Water Plants Due to microbiological activity in the process, or to a lesser extent due to the reduction in nitrate levels in the raw water, nitrogen compounds may give rise to increased nitrite concentrations. By Endress + Hauser, Inc.
A New Way To Desalinate — Government Tested, Real-World Approved
Developed by the Department of Defense, capacitive deionization (CDI) removes salt from water, while conventional methods remove water from salt. By Patrick Curran, CEO and founder, Atlantis Technologies
Project Profile: Lakeview Estates Community Durand, MI AD26 Arsenic, Iron & Manganese System In August, 2007 AdEdge Technologies, Inc. was selected among other vendors by Tri-County Drilling to supply an arsenic, iron, and manganese treatment system for the Lakeview Estates MHP in Durand, Michigan. By Adedge Technologies Inc.
Packaged Membrane System Helps Town Of Oak Creek, CO Meet Drinking Water Needs Located in Northwest Colorado, the Town of Oak Creek is a modest-sized community with a diverse landscape of mountainous peaks and rolling ranch land. Anticipating the spring run-off season and the need to treat a wide range of raw water quality, the Town of Oak Creek developed a fast track, design-build schedule to find a solution to its water treatment needs. By Siemens Industry, Inc. - Water Technologies
Biothane Delivers Anaerobic Wastewater Treatment To Veryfine Products Biothane’s turnkey project was designed to treat wastewater by providing a series of treatment processes. Pre-treatment consists of a bar screen, influent sump, grit removal and rotary screen to remove debris from the influent stream. By Veolia Water Solutions & Technologies
Micro-Media Filtration: Superior Pre-Filtration For Desalination Systems To ensure trouble free-operation of seawater desalination systems, membrane manufacturers recommend removal of suspended solids to negligible levels...
Case Study: California's Magnolia Power Project Utilizes HERO/Crystallizer Process For ZLD System
The Magnolia Power Project is utilizing state-of-the-art combined-cycle electric generation technology and being built on four acres of Burbank Water and Power’s (BWP) generation station complex adjacent to Magnolia Boulevard in Burbank. The 310-megawatt (MW) power plant will serve as locally operated generation for the cities of Burbank, Anaheim, Glendale, Pasadena, Cerritos and Colton.
Town Of Hillsborough Relies On Hach For Free-Ammonia Testing And Nitrification Control When Bay-area water wholesaler San Francisco Regional Water System (SFRWS) changed its residual drinking water disinfection process from chlorine to chloramine, the town of Hillsborough’s Water Quality staff faced the challenge of updating its water testing procedures to prevent nitrification and continue to meet state-mandated drinking water quality standards.
How Meter Nozzles Can Deliver Accuracy In Municipal Treatment Facilities
The United States Environmental Protection Agency claims there are approximately 155,000 public water systems in the nation and the public drinking water systems regulated by EPA provide drinking water to 90 percent of Americans. To put this in perspective, a family of four statistically uses 400 gallons of water daily. By Jeff Smith, Primary Flow Signal
Rocky Mountain Highlights: 9 Noteworthy Membrane Applications
The AnoxKaldnes™ MBBR (Moving Bed Biofilm Reactor) process is a biological wastewater treatment process that utilizes specialized plastic carriers to create a surface on which a biofilm can attach.
DRINKING WATER TREATMENT APPLICATION NOTES
Monitoring Chloramination Using The APA6000™ Ammonia/Monochloramine Analyzer
Chloramination, a process often used for disinfection of drinking water and wastewater, involves mixing chlorine and ammonia to form chloramines. The relative concentrations of both chlorine and ammonia are essential for optimum disinfection.
Hach LDO® Technology Improves The Efficiency Of Pharmaceutical Plant’s Wastewater Treatment Process
Bristol-Myers Squibb (BMS) is a global pharmaceutical and related health care company with the mission to extend and enhance human life. One of the company’s oldest and largest facilities was built in 1943 in East Syracuse, New York, when BMS was one of 12 companies chosen by the federal government to mass produce penicillin.
Application Note: Water Flows From The Golden Hills Of California Each morning John Johnson drives the few miles from his smalltown home in northern California to the Center at Pardee Reservoir. Nestled among the foothills of the Sierra Nevada mountain range, the reservoir is a long 100 miles away from San Francisco Bay. By YSI
Hach FilterTrak 660™ Sc Laser Nephelometer Even More Practical For Ultra-Low Turbidity Monitoring
Now compatible with the Hach sc100 Controller, the FilterTrak 660 sc Nephelometer connects as a ‘plug and play’ sensor with the universal, dualchannel controller that features an inherent power supply.
Application Note: Measurement Of TOC In Bottled Mineral Water And Raw Water By TOC-VCSH Water is used in large quantities to manufacture soft drinks, bottled mineral water, beer and other drinks. The quality of the raw water has a major influence on the quality of the manufactured products
Importance Of Measuring UV Transmittance (UVT) For UV Disinfection
UV disinfection systems disinfect water using UV light at the 254 nm wavelength. UV light at this wavelength actually destroys the DNA of microbiological material in the water which prevents dangerous viruses such as cryptosporidium and e-coli from reproducing and causing harm.
Phosphate Corrosion Control In Drinking Water
Corrosion occurs because metals tend to oxidize when they come in contact with oxygenated water, resulting in the formation of stable metal oxides.
Immediate pH Correction For Fluctuating Flow
In a number of water, wastewater and industrial process applications, pH is one of the most critical and highly sensitive analytical measurements. Examples of critical pH applications include: Reverse Osmosis (RO) systems in which a controlled feed of caustic solution is typically added to the feed stream in order to convert a portion of dissolved carbon dioxide into bicarbonate precipitate allowing for removal by the RO membrane. By Rafik H. Bishara, Steve Jacobs, and Dan Bell
On-Line Phosphorous Measurement Takes The Guesswork Out Of Alum Treatment
Phosphorous promotes eutrophication in surface waters and helps create conditions for algal blooming and oxygen depletion. Some phosphorous removal can occur naturally in a conventional biological wastewater treatment facility, but the result is not reliably compliant with increasingly strict limits on permissible phosphate levels in effluent discharged to receiving streams, ponds and lakes. By Bob Dabkowski, Hach Company
Organics Monitoring (TOC)
Total organic carbon (TOC) testing is the traditional method for determining organic matter in water. However there is a far more practical, affordable and often more useful way to measure organic matter. UV absorbance testing (UVA) is rapidly becoming the preferred method of measuring organics even when the levels of organics being measured are very small.
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LATEST INSIGHTS ON DRINKING WATER TREATMENT
Treatment Plant Discovers Fountain Of Youth, Long-Range Regulatory Compliance
An old (but important) drinking water facility finds new life through treatment upgrades, enabling compliance with strict water-quality regulations well into the future.
The “One Water” Approach
So far, water utilities have been successful in keeping up with regulations and maintenance, despite stagnant funding and uncertainty about when infrastructure could fail altogether. But the staggering cost to contend with these issues forces a new paradigm — how to best manage the ever-increasing demands on our water, wastewater and stormwater infrastructure with fewer dollars. By Dr. Mark LeChevallier, Director of Innovation & Environmental Stewardship at American Water
The Little-Known Cure For Disinfection Byproducts
A timeless drinking water facility needed a timely solution to disinfection byproducts (DBPs). The treatment process selected was (and is) unique to the region, but the results suggest that it deserves more consideration.
Treating Organic Micropollutants: Which Method Is Best?
A comparison of several OMP removal processes: adsorption, ozonation and advanced oxidation processes, membrane-based processes reverse osmosis (RO) and nanofiltration, and natural processes river bank filtration and constructed wetland systems.
Desalination And Power Plants—An Ideal Partnership?
A partnership between power and desalination plants may be the solution to drinking water scarcity. Researchers are working on a new system that can create potable water using a low-temperature desalination process powered by waste heat from a waterless power plant cooling system.
Level Measurement Showdown: Ultrasonic Vs. Radar
In the level measurement world, there is a rivalry between the two most commonly used measurement instruments: ultrasonic, which uses sound-based measurement, and radar, which uses high-frequency electromagnetic waves to determine distance.
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ABOUT DRINKING WATER TREATMENT
Drinking Water Treatment involves the removal of pathogens and other contaminants from source water in order to make it safe for humans to consume. Treatment of public drinking water is mandated by the Environmental Protection Agency (EPA) in the U.S. Common examples of contaminants that need to be treated and removed from water before it is considered potable are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.
There are a variety of technologies and processes that can be used to decontaminate or treat water in a drinking water treatment plant before the clean water is pumped into the water distribution system for consumption.
The first stage in treating drinking water is often called pretreatment and involves screens to remove large debris and objects from the water supply. Aeration can also be used in the pretreatment phase. By mixing air and water, unwanted gases and minerals are removed and the water improves in color, taste and odor.
The second stage in the drinking water treatment process involves coagulation and flocculation. A coagulating agent is added to the water which causes suspended particles to stick together into clumps of material called floc. In sedimentation basins, the heavier floc separates from the water supply and sinks to form sludge, allowing the less turbid water to continue through the process.
During the filtration stage, smaller particles not removed by flocculation are removed from the treated water by running the water through a series of filters. Filter media can include sand, granulated carbon or manufactured membranes. Filtration using reverse osmosis membranes is a critical component of removing salt particles where desalination is being used to treat brackish water or seawater into drinking water.
Following filtration, the water is disinfected to kill or disable any microbes or viruses that could make the consumer sick. The most traditional disinfection method for treating drinking water uses chlorine or chloramines. However, new drinking water disinfection methods are constantly coming to market. Two disinfection methods that have been gaining traction use ozone and ultra-violet (UV) light to disinfect the water supply.