Ashley Valley Water & Sewer Improvement District (AVWSID) serves rural county residents who live outside the city of Vernal, Utah.
DRINKING WATER CASE STUDIES AND WHITE PAPERS
Assessing Key Unconventional Shale Wastewater Trends And Opportunities
The shale-gas boom could make water the most important commodity product of the 21st century.
Three Steps For Reducing Total Cost Of Ownership (TCO) In Pumping Systems
Energy costs have become an increasing contributor to pumping systems Total Cost of Ownership (TCO). In fact, energy cost represents 40% of the TCO of a typical pump. It is possible to reduce the electrical consumption by at least 30% utilizing Variable Speed Drives while decreasing maintenance costs associated with the mechanical driven system. This paper explains how to reduce TCO with a limited investment focused on three key areas: energy efficiency management, asset management, and energy cost management.
Full Scale Installation: Village Of Bartlett, Illinois
Located 35 miles northwest of Chicago, current population approximately 36,000. Average radium levels approximately 9 pCi/L. No other treatment, only the addition of chlorine and polyphosphate.
Protecting Our Water – Keep Chemicals In The Tank
Leaking or overfilled tanks can cause environmental problems, contaminate drinking water, and cost a company millions of dollars. Proper instrumentation, monitoring and control can prevent these problems. By Bill Sholette, Level Products Business Manager, and Ricardo Chavez, Solutions Business Manager, Endress+Hauser
ORP Based Measurement Of Oxidizing Disinfectants In Aqueous Solutions
Oxidizing antimicrobials, such as chlorine, are common disinfectants used to treat water. Test strips, DPD kits, and colorimeters are currently the most popular methods for determining the relative disinfecting power of oxidizing antimicrobial agents in these applications. By Myron L Company
Drinking Water Disinfection - Coquitlam Water Treatment Plant, British Columbia (Case Study)
In 2005, in response to changes to the Canadian Drinking Water Quality guidelines, the Greater Vancouver Water District Board approved a proposal to upgrade the Coquitlam WTP with UV disinfection technology to act as the primary means of disinfection.
White Paper: The Leopold® Clari-DAF™ System For Membrane Pretreatment The idea that membranes could be used for solids removal and concentration in potable water treatment schemes has been known for hundreds of years. It has only been in the past 50 years or so that reverse osmosis membranes for treating brackish waters or sea water have been considered a cost-effective viable alternative. More recently, the membrane suppliers have produced low-pressure membranes that are applied in current treatment process schemes to enhance the water quality effluent required to meet additional regulatory guidelines
Eliminate CIP And Cut Wastewater Disposal In Half With CCD
A high water recovery rate is essential for this well-known soy protein manufacturer.
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
Using Granular Activated Carbon To Meet DBP Regulations
The Roche Harbor Water Treatment Plant is located on the northwest side of San Juan Island in San Juan County, Washington state. Although a significant part of the land in the county is privately owned, the watersheds there provide a public benefit for both residents and visitors. San Juan Island’s economy is tourist-driven; the island was voted #2 on the New York Times list of “41 Places to go in 2011.” Its marina has been a top boating destination for more than fifty years. Incorporated in 1886, the community has seen slow but steady population growth in recent decades. Roche Harbor Water System Inc. has been in operation since 1968 when PVC piping replaced the island’s existing wooden pipe system.
DRINKING WATER APPLICATION NOTES
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.
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
Membrane Degassing And Debubbling Of High Viscous Fluids With Liqui-Cel® And SuperPhobic® Membrane Contactors Increased gas content often leads to problems with bubble formation in highly viscous fluids. Membrane Contactors can provide an in-line and simple solution for improving processes by removing the bubbles from viscous liquids before they create a problem in a process operation. Membrane Contactors provide a very compact and efficient solution to the problems caused by bubbles. By Membrana
Measuring The Chlorine Content In The Emergency Chlorination Of Waterworks Many municipal waterworks perform no permanent disinfection of drinking water. However, in many cases a process known as emergency chlorination takes place. The process is switched on in case of need, adding chlorine to the drinking water as a disinfectant.
Bringing Efficiency And New Confidence To BOD₅ Analysis
Biochemical Oxygen Demand (BOD) analysis is the test everyone loves to hate—and for compelling reasons.
Ion Exchange Resins And Activated Carbons For Better-Tasting Water
For many, access to good-tasting tap water is limited, and buying bottled water can be expensive. Simple pour-through jug filters offer a low-cost and effective alternative. Activated carbons, in conjunction with ion exchange products, produce drinking water that is absent of all industrial pesticides and contaminants.
Application Note: YSI Water Quality Monitoring Buoys Help Connecticut DOT Protect The Housatonic River When replacement of the Sikorski Bridge spanning the Housatonic River was authorized, Paul Corrente and the Connecticut Department of Transportation (CT-DOT) set about the design and development of a water quality monitoring program to monitor the contractor’s in-water activities to insure full protection of the river from perturbation
Hydrogen Sulfide Removal From Water Using AquaSorb® CX-MCA
The “rotten egg” odor in some water supplies is caused by sulfide in water. Sulfide can be treated using oxidation techniques, the goal being to convert the sulfide to high oxidation state species such as sulfate to eliminate the taste and odor concerns. Traditional oxidation techniques such as ozone and chlorine can be used, but can be expensive due to the equipment required to add and monitor the oxidant, and can lead to by-products such as trihalomethanes (THMs), which are regulated in drinking water supplies.
Chemical Cost Comparison Of A Conventional Deaerator Vs A Liqui-Cel® Membrane Contactor System Mixed bed ion exchange is often used to polish Reverse Osmosis (RO) permeate in many industrial water systems.This process has been utilized for several years and it is well known that the management of the dissolved Carbon Dioxide (CO2) in the water is critical for an efficient operation. By Membrana
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.
DRINKING WATER PRODUCTSMore Products
LATEST INSIGHTS ON DRINKING WATER
Small UV Plant Is Designed To Address Cultural And Safe Drinking Water Needs Cost-Effectively
BI Pure Water worked with University of British Columbia researchers and Lytton First Nation to develop a water disinfection system that addresses the needs of native communities, both cultural values as well as the basic necessity of clean drinking water.
Sun-Activated LilyPads Remove Contaminants Without Chemicals
Puralytics LilyPads are hardly noticeable in the ponds, lakes, and catchment areas where they are deployed. Made of mesh and plastic, the flat, 1-meter diameter disks could even be confused for their plant namesake if not for their white color.
Does Your Meter Reading System Pass The Disaster Preparedness Test?
One of the most difficult challenges a water utility may ever face is having to re-build or re-establish its operations in the wake of a natural disaster.
Top 10 Technologies From WEFTEC
They did it again. Seemingly every year WEFTEC breaks records for size and attendance, and 2014 in New Orleans was no exception. There was a lot to choose from, but I picked my favorite innovations to highlight in what has become another annual tradition — Water Online’s “Top 10” from WEFTEC.
Is Your Utility Taking Advantage Of Data Analytics?
Utilities worldwide are addressing limited resources and operational challenges by deploying and connecting smart technologies through a single communication network.
Benefits Of Clean Power Plan Are Measureable – Drop For Drop
Since EPA released its proposed Clean Power Plan (CPP) in June of this year, the plan has been a hot topic in every state.
DRINKING WATER NEWS
DRINKING WATER VIDEOSMore Drinking Water Videos
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.