DRINKING WATER TREATMENT
Confusion often arises over the difference between mass and volume flow measurement and when a particular measurement should be applied.
DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS
Performance Of A Conventional Surface Water Plant Using Mixed-Oxidants For Microflocculation And Final Disinfection
The surface water source is from snow-melt and summer thunderstorm run-off from the mountains. This water is detained in McClure Reservoir (7876 ft elevation) and Nichols Reservoir (7483 ft elevation) upstream from the CRWTP, a conventional plant built in 1974 with a design capacity of 8 MGD. Because the City has limited surface water rights, and due to decreased demand, the treatment plant usually shuts down for 60 to 90 days during winter. The reservoirs thaw in spring and turn over in autumn, and during the summer rainy season, raw water turbidities may exceed 5 NTU. By MIOX Corporation
Antiscalant Impacts Water Reclamation Efforts
Water reuse efforts in the West Coast are a priority and have the Ground Water Replenishing System (GWRS) of the Orange County Water District (OCWD) utilizing new technologies for water conservation.
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
Case Study: Saudi Arabian Airport Successfully Uses Aquatech’s Seawater Reverse Osmosis System India’s first Ultra Mega Power Project (UMPP) at Mundra in Coastal Gujarat, a 4,000 MW coal fired plant, is owned by Coastal Gujarat Power Limited (CGPL), a Tata Power group company.
Hydro-Guard Advanced Flushing System Simplifies Operations, Increases Water Quality And Saves Treatment Expenses
Birmingham Water Works Board (BWWB), Birmingham, Alabama has consistently achieved the rating of the number five water system in the United States for water quality. BWWB’s potable water distribution system (WDS) serves 600,000 people with a daily average use of 100 million gallons (378 million liters) of water, received from nearby lakes and rivers. The system includes 51 water storage tanks, nearly 4,000 miles (6,437 km) of pipe, over 13,000 fire hydrants and over 200,000 service connections.
Activated Carbon Applications for Drinking Water Production
Water is an essential element of life: it accounts for 70% to 80% of the weight of a human being. The quality of water is an important parameter that affects all aspects of the well-being of ecosystems and mankind, from human health, to food production, economic activities and biodiversity.
Using Pump Variable Speed Drive Solutions In Membrane Filtration
Variable frequency drives (VFDs) are nothing new to membrane filtration units. The most typical use of an external VFD on pressure pumps for reverse osmosis (RO) or ultra-filtration (UF) systems is to account for variability in flow.
A Field Testing Must Have Device To take control of our water quality, we first need to know what's in our water. Having portable testing devices to measure important water quality parameters in the field empowers water treatment professionals with improved water quality understanding, enabling them to take more immediate and effective action. By Real Tech Inc.
Sodium Hypochlorite: The Unsung Hero In Disinfection
For the fortunate few in this world, many of us enjoy fresh cold water from our taps, crisp white linens in hotel rooms, and refreshing and safe water in swimming pools. It all seems very easy and straight forward with all the new technologies available in the industry to ensure safe and clean drinking water. A reliable and effective technology is always needed to ensure peace-of-mind for all water treatment processes. In many cases, it is the centuries old Sodium Hypochlorite (NaClO) chemical, or as known by every household – Bleach. By Angela Yeung, District Sales Manager, Grundfos
Reactivated Carbon Reduces Municipality’s Water Treatment Costs By 23%
With the cost of virgin granular activated carbon (GAC) on the rise, Guilderland Water District sought an alternative source of filtration media. In this case study, you’ll learn why Guilderland converted its plant to reactivated carbon, and as a result, realized 23% cost savings while maintaining water quality requirements set forth by the EPA.
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
Lab Gas Sub-Metering Accuracy Improves With Thermal Flow Meters To Save Money
Facility administrators will find the advanced ST100 Series Thermal Mass Air/Gas Flow Meter from Fluid Components International (FCI) helps them improve the accuracy of specialty gas point of use and sub-metering operations to achieve accurate billing in their labs for better cost tracking and control.
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
Application Note: Real-Time Monitoring-Through Swell And High Water Application article about water quality monitoring pontoon providing continuous data in the Burry Inlet, an estuary in Wales. By YSI
Bottled Water Industry: Liquid Analytical Solutions
Americans consume more than 9.1 billion gallons of bottled water annually - an average of twentynine gallons per person every year.
Analysis Of Pesticide Residue In Spinach Using The AutoMate-Q40 An Automated QuEChERS Solution
QuEChERS is a Quick-Easy-Cheap-Effective-Rugged-Safe extraction method that has been developed for the determination of pesticide residues in agricultural commodities.
Monitoring Aromatic Organics For Optimizing Coagulation
With the increasing awareness about the negative effects of organics within the water and wastewater treatment process along with increasingly strict water quality regulations, the need for more effective organics removal is becoming more important.
Disinfection By-Products (DBP) Precursor Monitoring
Chlorine has long been used as a primary disinfection method for many water and wastewater treatment applications. However, there is growing concern about the harmful DBP’s produced by the use of chlorine.
Water Distribution System Wireless Monitoring Application Note
Providing water distribution monitoring solutions since 1987, Telog continues to offer the industry’s leading remote data acquisition system including the most comprehensive family of battery powered, environmentally rugged wireless monitors available from any single supplier.
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
DRINKING WATER TREATMENT PRODUCTSMore Drinking Water Treatment Products
LATEST INSIGHTS ON DRINKING WATER TREATMENT
Biological Drinking Water Treatment: Microbiological Considerations For The Operation And Control Of Biofilters
It’s well known the beneficial role that particular groups of microorganisms have in the food and beverage industry. Similarly are the beneficial aspects that either engineered or non-engineered biological treatment systems have in the drinking water production process.
New Challenge: Put Technology To Work To Protect Drinking Water
You likely remember when, this past summer, half a million people who live in the Toledo, Ohio, area were told not to drink the water coming out of their taps for several days. A state of emergency was declared because of a harmful algal bloom, which released toxins into the water that could have made many people ill.
EPA’s Upcoming Regulation On Strontium — What You Need To Know
In October, the U.S. Environmental Protection Agency (EPA) made a preliminary determination to regulate strontium in the nation's drinking water.
Drinking Water Protection — Are We Doing It Right?
“We have analytical instruments that can see things in astronomically small numbers, but are we looking for the right things?”
The Nationwide Impact Of California’s Hexavalent Chromium Regulations
California recently became the first U.S. state to regulate hexavalent chromium in drinking water. Will others follow suit?
Biological Drinking Water Treatment: Challenges And Potential
The continuous struggle to remediate contaminated natural waters, and to reduce the impact of emerging challenges on the supply of safe potable water are key drivers for research and development in the global water industry today.
DRINKING WATER TREATMENT NEWS
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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.