DRINKING WATER TREATMENT
Desalination Technology Transforms 650 m3/day of Abused Industrial Wastewater
DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS
White Paper: The Leopold Clari-DAF System for Potable Water Clarification Potable water treatment plants process raw water from ground and surface sources to produce a product that meets all of the regulatory requirements for consumption. Surface water treatment plants are required to have at least filtration, and usually will first remove solids in order to optimize filter performance. This paper presents the Leopold® Clari-DAF™ (Dissolved Air Flotation) system as an excellent choice for potable water clarification. In the Clari-DAF system process, raw water particles are flocculated and separated out of the water by floating them to the surface, rather than settling them to the bottom of a basin
South Australia’s $403 Million North South Interconnection System Project (NSISP) Uses A “Super” Valve To Perform In A Variety Of Extreme Conditions
NSISP is one of South Australian Water Corporation’s (SA Water) biggest infrastructure projects undertaken in Adelaide metropolitan to connect the north and south drinking water distribution systems and to increase access to their desalination plant. The project included the construction of 32 km of pipeline through metropolitan main roads and suburban inner streets. This is no small feat and getting it done right meant fitting together a lot of different moving pieces.
UV Eliminates Cryptosporidium Issues In The Heartland
The City of Moline is now adding validated UV systems to provide an additional barrier for the filtered water, which will improve water quality and ensure that none of the chlorine tolerant organisms such as Cryptosporidium is present. The City of Moline is located in the heart of the Midwest, tucked between the banks of the Mississippi and Rock River in Rock Island. Moline is one of four cities that make up the Quad Cities that include Rock Island, Illinois and Bettendorf and Davenport Iowa.
Finding The Right Pretreatment Mix For RO/Ion Exchange Systems
Smart defense benefits the entire team. Having an ffective, durable water pretreatment system in advance of reverse osmosis (RO) or ion exchange systems is the first, most critical line of defense ensuring smooth, more trouble-free performance downstream. Contributed By Eco-Tec
White Paper: A Practical Guide to Sampling and Testing Filter Media This paper presents a practical guide to obtaining a representative sample of filter media at the point of manufacture and on the job site as well as providing insight into selecting a media testing laboratory and the pitfalls of the various tests performed on those samples...
Pulse Burst Radar ‘Levels’ Competition For Chemical Waste Tank Process Control
Our customer case studies illustrate how our proven level and flow controls are helping industry leaders improve the safety of their mission-critical applications. This recent case study demonstrates that pulse burst radar technology can provide a highly reliable level control solution for challenging process applications.
Low Pressure, High Output 800‐Watt Amalgam System Performing Efficiently
The Trail Lakes Hatchery is owned by the State of Alaska and is managed under contract by the Cook Inlet Aquaculture Association (CIAA) on behalf of the Alaska Department of Fish and Game. CIAA was established in 1976 to provide the Cook Inlet drainage with an organized and reliable salmon stock. The Trail Lakes facility is permitted to introduce sockeye and coho salmon at several sites throughout the Cook Inlet watershed.
High Recovery Reverse Osmosis Water Treatment For Industrial, Agricultural, And Municipal Applications
Industry accounts for nearly 60 percent of fresh water withdrawals in the developed world and agriculture consumes 70 percent of fresh water supplies globally, according to UNESCO.
New Technologies Set To 'Disrupt' The Industry
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.
Case Study: Customized Hydraulic And Water Quality Model Interface In March 2003, Black & Veatch started a project to streamline the hydraulic and water quality modeling processes for one of the largest wholesale water suppliers in Florida. The water supplier delivers water from fourteen different sources to more than two million people in six different communities. The client needed a way for its staff of water quality, planning, and engineering professionals to perform hydraulic simulations on a regular basis
DRINKING WATER TREATMENT APPLICATION NOTES
Application Note: YSI 600 Optical Monitoring System Used To Protect Lake Oconee, Georgia Water Quality Northern Georgia is experiencing unprecedented development; consequently, water quality in many of its watersheds is in jeopardy of severe degradation. The State of Georgia, Environmental Protection Division (EPD) has implemented an NPDES monitoring and enforcement program designed to prevent construction activities from impacting water quality
Bottled Water Industry: Liquid Analytical Solutions
Americans consume more than 9.1 billion gallons of bottled water annually - an average of twenty nine gallons per person every year.
A Comparative Study Of On-Line And Laboratory TOC Analyzers For Analysis Of Raw And Finished Drinking Water
Total organic carbon (TOC) analysis is an important indicator of water quality throughout the drinking water treatment process. Raw source water is progressively treated in chemical coagulation, flocculation, sedimentation, and filtration steps to remove particulate matter and natural organic matter (NOM).
Removal of Chloramines with Activated Carbon
In order to reduce the formation of harmful disinfection byproducts in drinking water, alternative disinfectant use has become increasingly widespread. Monochloramine is a leading alternative disinfectant that offers advantages for municipal water. This tech brief details the removal of monochloramine using activated carbon.
Technical Note: Using Liqui-Cel® Membrane Contactors To Solve Resistivity Problems In A High Purity Water Loop Pureflow, Inc. is a Southeastern-based expert in designing complete water treatment systems as well as providing value-added solutions for fixing operational issues in existing systems. Pureflow teamed up with Membrana to help solve an operational issue at one of their customer’s facilities. By Membrana
Application Note: Desalination Plants: YSI Instruments Monitor Flow & Water Quality At Multiple Stages Desalination is the process of removing salt from sea water or brackish river or groundwater to make potable water. By YSI
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
Determination Of EN15662:2008 - Determination Of Pesticide Residue In Food Of Plant Origin, By An Automated QuEChERS Solution
Pesticide residue laboratories are required to undertake analyses of an ever increasing number of samples. The analyses typically involve use of multi-residue methods (both GC-MS and LC-MS) to test for over 500 pesticide residues.
Advanced On-Line Instrumentation Helps DAF Systems Lower Costs
Many food processors use dissolved air flotation (DAF) to remove fats, oils and grease (FOG) and suspended solids from their wastewater streams.
Determination Of Polycyclic Aromatic Hydrocarbons In Seafood
Polycyclic Aromatic Hydrocarbons (PAHs) are a large group of organic compounds found naturally in the environment. PAHs are monitored by the US Environmental Protection Agency due to their carcinogenic characteristics.
DRINKING WATER TREATMENT PRODUCTSMore Drinking Water Treatment Products
LATEST INSIGHTS ON DRINKING WATER TREATMENT
Arsenic Update: Top Technologies Revealed
The federal regulation for arsenic has been in place since 2002, and yet many utilities remain noncompliant. The culprit isn’t treatment capability, but cost. It happens that the most popular treatment technique is also quite expensive — but it doesn’t have to be.
A Preview Of IDA World Congress 2015
From August 30 to September 4, the International Desalination Association (IDA) will be hosting its biennial world congress in San Diego.
ED vs. RO: The Benefits Of Electrodialysis For Desalination
There is no doubt that reverse osmosis (RO) currently reigns among desalination techniques, if your metric is total number of installations. But a new competitor has arisen, at least for particular applications. If you have brackish water in the 2,000 to 15,000 ppm range of total dissolved solids (TDS), you may want to consider electrodialysis (ED) over RO.
UVC LEDs For Biofilm Prevention
Biofilm has adverse effects on all types of instruments, sensors, and equipment used in power plants, food and beverage production plants, desalination facilities, paper mills, and marine environments. This includes growth on pipelines, tanks, heat exchangers, reverse osmosis (RO) membranes, and other equipment. Biofilms can cause reduction of heat transfer, increased pressure drop and corrosion of metallic surfaces, and many forms of contamination.
Coming Of Age: UV-C LED Technology Update
Sometimes technology innovations come along which cause a paradigm shift in how products are designed.
The Zen Of Smart Pressure Management: Calming Water Distribution Networks
Over recent years, water companies around the world have enhanced their ability to control the pressure of water in their distribution networks to improve customer service and achieve environmental savings.
DRINKING WATER TREATMENT NEWS
DRINKING WATER TREATMENT VIDEOSMore From Drinking Water Treatment Videos
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.