Westwood, California was billing its water using a flat rate system. According to Community Services District General Manager Randy Buchanan, most customers in his service area had no idea how much water they were using, as no services were metered.
DRINKING WATER CASE STUDIES AND WHITE PAPERS
Arsenic Removed From Drinking Water With Iron Oxide Adsorption Treatment
When high levels of arsenic were found in the drinking water in the community of Alto Lampa outside of Santiago de Chile, municipal water provider Aguas Adinas faced a predicament. AdEdge Water Technologies was contacted to design a treatment approach. This case study describes how iron oxide adsorption helped Alto Lampa reduce arsenic levels in treated water to non-detectable concentrations.
Membrane Filtration Water Treatment Plant Meets Hotel Complex's Needs
The Little America West Hotel complex located near the town of Granger, Wyoming, used an outdated surface water treatment plant that provided poor quality water during storm events.
Three Categories Of Sustainability
Nearly 4.7 billion gallons of water were saved in 2013 alone through installation of Badger Meter water utility solutions.
White Paper: High-Efficiency Reverse Osmosis Treats Gray Water For Power Generation
Recycling of gray wastewater as boiler make- up water was the challenge where silica value was typically 85 ppm in this secondary treated wastewater. This paper describes a new design called the High-Efficiency Reverse Osmosis selected for that task, discusses the project technical considerations and highlights the actual performance of the system.
Project Profile: Meadow Lake MHC White Lake, MI 750 GPM Iron & Manganese System In February 2008 AdEdge Technologies, Inc. was selected as the sole vendor by Sun Communities, a nation wide owner and operator of Mobile Home Communities, to supply an iron and manganese treatment system, for the Meadow Lake MHC in White Lake, Michigan. By Adedge Technologies Inc.
Endocrine Disrupting Compounds And Their Treatment
Endocrine disrupting compounds (EDC) are a subset of chemicals identified as contaminants of emerging concern, or “CECs.” EDCs are chemicals that can affect the endocrine (hormonal) systems of humans and animals. Hormones regulate reproduction, growth, and behavior. Anything that can potentially disrupt those functions must be studied carefully.
Water Supplier Ensures DBP Compliance With UV254 Organic Monitoring Mohawk Valley Water Authority (MVWA) is a progressive supplier of potable water. With source water from the Adirondack Mountains, MVWA works to improve on nature and provide superior water quality, always striving to meet or exceed drinking water standards. Like many other surface water sources, MVWA’s water supply is rich with natural organic matter (NOM). Unfortunately, growing research has demonstrated that NOM in water when combined with chlorine leads to the formation of potentially harmful disinfection by-products. By Jodi Glover, Real Tech Inc.
A Practical Solution For Real-Time Organic Monitoring Monitoring organics continuously provides instantaneous water quality data that is vital for several of the most common water and wastewater treatment applications.
A New Generation Of Filling Control Systems
The filling control technology employed in bottling machinery has evolved over the past decade, offering higher levels of accuracy and reproducibility, while achieving extremely high reliability
Next Generation FPI Mag Flow Meter Helps Provide Clean Water For Seattle
The Cedar Water Treatment Facility (CWTF) serves the residents of the City of Seattle. This state-of-the-art plant was designed and built, and is now operated by CH2M Hill. Working together, CH2M Hill and McCrometer improved flow measurement at the facility with the FPI Mag® Flow Meter.
DRINKING WATER APPLICATION NOTES
Alcoholic Beverage Fusel Alcohol Testing With Static Headspace
A static headspace method was developed using Teledyne Tekmar automated headspace vial samplers to meet the method requirements of the Alcohol and Tobacco Tax and Trade Bureau of the US Department of the Treasury (TTB) method SSD: TM:2001 for testing fusel alcohols in alcoholic beverages.
Leak Detection Using Conductivity
Virtually all industries from food and beverage to chemical processing use heat exchangers, condensers,or jacketed vessels. Leakage of the process into the cooling water represents a loss of product and can be a source of fouling or corrosion in the cooling water system.
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.
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.
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.
Application Note: Miami Conservancy District Uses Nitrate Screening As Conjunctive Management Tool Tasked with monitoring a watershed covering nearly 4,000 square miles, almost 2,300 miles of rivers and streams, and a huge aquifer that provides drinking water for more than 1.2 million people, water quality monitoring specialists at the Miami Conservancy District (MCD) in Dayton, Ohio, have their hands full. By YSI
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 Pesticide Residues In Honey, By An Automated QuEChERS Solution
The QuEChERS (Quick-Easy-Cheap-Effective-Rugged-Safe) sample extraction method was developed for the determination of pesticide residues in agricultural commodities.
Water Distribution System Security Monitoring
Ensuring safe drinking water doesn’t end when the water leaves the water treatment plant. Protecting the safety and security of drinking water from accidental or intentional contamination within the distribution system is becoming increasingly important.
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.
DRINKING WATER PRODUCTSMore Products
LATEST INSIGHTS ON DRINKING WATER
The Long Journey Of An Energy-Water Bill In Texas
Being an environmental advocate in Texas may seem like an uphill battle, and I make no bones about the fact it most certainly is.
Coming Of Age: UV-C LED Technology Update
Sometimes technology innovations come along which cause a paradigm shift in how products are designed.
Prepare To Pump Up Efficiency
The U.S. Department of Energy (DOE) has proposed its first-ever energy standards for commercial and industrial pumps, aimed at saving energy in the agricultural and municipal clean water sectors.
10 Tech Discoveries From ACE15
Although drought was a particularly dominant theme this year, ACE15 offered its usual plethora of solutions for all water practitioners. The event drew in excess of 10,000 attendees from around the world with problems as varied as the systems they represent. Lucky for them, there were more than 500 exhibitors on hand at the Anaheim Convention Center with potential answers. Among the many, here are 10 products that have particular potential.
Straight Talk On Radiation
From time-to-time I write on topics that are related to water and wastewater as a "backgrounder" so that those involved in the field can gain a wider perspective and have available to them a cogent explanation minus jargon on various topics. By Dr. J.H. Wakefield
EPA Fails 6 Subjects
Like so many schoolchildren sweating out final grades, the U.S. EPA gets its own report card each year, served by the EPA Office of Inspector General (OIG). Unfortunately, it’s full of bad marks.
DRINKING WATER NEWS
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ABOUT DRINKING WATER
In most developed countries, drinking water is regulated to ensure that it meets drinking water quality standards. In the U.S., the Environmental Protection Agency (EPA) administers these standards under the Safe Drinking Water Act (SDWA).
Drinking water considerations can be divided into three core areas of concern:
- Source water for a community’s drinking water supply
- Drinking water treatment of source water
- Distribution of treated drinking water to consumers
Drinking Water Sources
Source water access is imperative to human survival. Sources may include groundwater from aquifers, surface water from rivers and streams and seawater through a desalination process. Direct or indirect water reuse is also growing in popularity in communities with limited access to sources of traditional surface or groundwater.
Source water scarcity is a growing concern as populations grow and move to warmer, less aqueous climates; climatic changes take place and industrial and agricultural processes compete with the public’s need for water. The scarcity of water supply and water conservation are major focuses of the American Water Works Association.
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 for contaminant removal and the removal of pathogens 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.
Drinking Water Distribution
Drinking water distribution involves the management of flow of the treated water to the consumer. By some estimates, up to 30% of treated water fails to reach the consumer. This water, often called non-revenue water, escapes from the distribution system through leaks in pipelines and joints, and in extreme cases through water main breaks.
A public water authority manages drinking water distribution through a network of pipes, pumps and valves and monitors that flow using flow, level and pressure measurement sensors and equipment.
Water meters and metering systems such as automatic meter reading (AMR) and advanced metering infrastructure (AMI) allows a water utility to assess a consumer’s water use and charge them for the correct amount of water they have consumed.