DRINKING WATER

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. 

DRINKING WATER CASE STUDIES AND WHITE PAPERS

  • The Basics Of Disinfection
    The Basics Of Disinfection

    From utility water to wastewater, whether used in industrial processes or for drinking, disinfection plays a prominent role in providing safe and useable water. Water free from pathogens and other microorganisms ensures processes run efficiently and people are kept safe from disease. By Harland R Pond, Business Development Manager – Water Treatment

  • Project Profile: Highland Hills MHC Highland, MI 450 GPM AD26 Arsenic, Iron System In January 2008 AdEdge Technologies, Inc. was selected among other vendors by Nationwide MHP to supply a turnkey arsenic, iron, and manganese treatment system for the Highland Hills MHP in Highland, Michigan. The system consists of multiple wells that combine together to serve potable water to 306 connections and a population of 765 in the community. By Adedge Technologies Inc.
  • Why Pilot Test Prior To Purchasing A Water Treatment System?
    Why Pilot Test Prior To Purchasing A Water Treatment System?

    There are a number of advanced water treatment tools available today that were not available 10 years ago, which broaden the approach to finding the most effective and least expensive treatment alternatives. Pilot testing of various technologies is the most beneficial method to determine the efficiency of treatments.

  • Top 10 Considerations When Converting To On-Site Hypochlorite
    Top 10 Considerations When Converting To On-Site Hypochlorite

    Transporting pure salt - the raw material needed to generate sodium hypochlorite onsite – is more cost effective, stable, and safer, than transporting and storing bulk sodium hypochlorite, or gaseous/liquid chlorine cylinders from local chemical suppliers. The conversion to on-site hypochlorite generation can be achieved by adhering to these design guidelines.

  • 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
  • Water Supply Needs At Odds With Regional Demands To Lower Power Use
    Water Supply Needs At Odds With Regional Demands To Lower Power Use

    The shoreline of the Red Sea is a dazzling destination for tourists and locals to experience the beach and enjoy marine activities. In Egypt, the shoreline sprawls from the Suez Canal in the north, down to the southern part of the country bordering Sudan.

  • Overcoming Difficult Conditions, Salty Groundwater And Changes In Feedwater Quality
    Overcoming Difficult Conditions, Salty Groundwater And Changes In Feedwater Quality

    Kibbutz Reim had to convert salty groundwater into a high quality irriga­tion resource in this desert-like region. High recovery was essential to this customer, both because of the limited amount of groundwater available and the challenge of brine disposal from their inland location.

  • An Alternative Mathematical Model For Oxygen Transfer Evaluation In Clean Water
    An Alternative Mathematical Model For Oxygen Transfer Evaluation In Clean Water

    Energy consumption from aeration system is a biggest part of the total energy cost in wastewater treatment plant and account for as much as 60% of the energy consumption for the activated sludge process. Therefore, it is very important to know how effective the aeration system and significant attention has been paid to development and upgrade of standard method for quantifying oxygen transfer efficiency of the aeration system. By Yanjun (John) He, PE, BCEE, Kruger Inc.

  • High Recovery Reverse Osmosis Water Treatment For Industrial, Agricultural, And Municipal Applications
    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.

  • 4 Tips For Building Meter-Related Revenue
    4 Tips For Building Meter-Related Revenue The water meter industry operates on revenue and the modern utility is both a business and a public service. This article deals with the business and revenue side of the water industry. I don’t question the ability of the modern water utility to produce safe, high-quality water. However, I am concerned about the service side, since fairness to the end users of our product and fairness to the utilities who produce this very high-quality product is important and closely related to the revenue issues. It is our job to collect the revenue to which we are entitled by the application of fair business practices and the use of accurate and cost-saving measurement devices. I will talk about building revenue by avoiding revenue loss. By Floyd S. Salser, Jr., CEO, MARS Company
More Drinking Water Case Studies and White Papers

DRINKING WATER APPLICATION NOTES

More Drinking Water Application Notes

DRINKING WATER PRODUCTS

Microfiltration Performance That Maintains Wine Quality

Microfiltration Performance That Maintains Wine Quality

Liqui-Flux - Modules are available in a wide variety of sizes and materials to meet various needs in beverage clarification.

Atomx Automated VOC Sample Prep System

Atomx Automated VOC Sample Prep System

The Atomx Automated Sample Prep System combines an Autosampler and Purge and Trap into a single instrument for the analysis of VOCs in soils and waters. This is the first of its kind and only system that employs a unique methanol extraction automation feature for high level soils in accordance with USEPA Method 5035.

Brands You Know. Performance You Trust

Brands You Know. Performance You Trust

While the Evoqua name is new, the brands you know and the performance you trust are not. Evoqua continues a 100-year tradition of helping consulting engineers and municipalities respond to market needs and evolving water standards for new plants, upgrades and retrofits.

Filtration: Pleated Paper Filter Series

Filtration: Pleated Paper Filter Series

Shelco's Pleated Paper Series housings are the most versitile filtration units produced in the industry.
Disinfection: FCL<I>i</I> Free Chlorine Measuring System

Disinfection: FCLi Free Chlorine Measuring System

Measuring free chlorine for on-line continuous applications can be accomplished in fresh water applications using the free chlorine system FCL without the use of chemical reagents or pre-treatment. The complete system includes a sensor, cable, analyzer, and flow controller. Continuous pH correction eliminates expensive and messy reagents and troublesome sample conditioning systems in samples having pH as high as 9.5. The full feature-packed analyzer includes dual outputs, three programmable alarm relays and a two-line display with a choice of six languages.

ULTRAPEN&trade; PT3 ORP/REDOX & Temperature Pen

ULTRAPEN™ PT3 ORP/REDOX & Temperature Pen

This instrument is designed to be extremely accurate, fast, and simple to use in diverse water quality applications.

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LATEST INSIGHTS ON DRINKING WATER

  • Protecting Your Drinking Water For 40 Years
    Protecting Your Drinking Water For 40 Years

    As I traveled across the country this year, there’s one thing I could count on everywhere I went: tap water that’s safe to drink.

  • New Challenge: Put Technology To Work To Protect Drinking Water
    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
    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.

  • 21 Questions For The EPA
    21 Questions For The EPA

    To celebrate the 40th anniversary of the Safe Drinking Water Act (SDWA), the U.S. EPA organized a Twitter chat (#safetodrink) as an open forum for questions and answers on SDWA issues, or whatever else popped up. Here's how it unfolded.

  • Drinking Water Protection — Are We Doing It Right?
    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?”

  • Emergency Tank Repair Prevention And Preparation — Avoid Winter Woes
    Emergency Tank Repair Prevention And Preparation — Avoid Winter Woes

    Drinking water tanks are surrounded by threats daily, but most problems associated with emergency tank repairs can be prevented. Extra time and maintenance may be needed to ensure the tank is protected, and water operators should have an effective plan to restore water services if a tank emergency does occur.

More Drinking Water Features

DRINKING WATER VIDEOS

Subcommittee Hearing: Cyanotoxins In Drinking Water

On Wednesday, November 19, 2014, at 10:15 a.m. in 2322 Rayburn House Office Building, the Subcommittee on Environment and the Economy will hold a hearing entitled “Cyanotoxins in Drinking Water."

Video: Mayor Bloomberg Announces Installation Of Automated Water Meter Readers

Video: Mayor Bloomberg Announces Installation Of Automated Water Meter Readers

Mayor Bloomberg, Department of Environmental Protection Acting Commissioner Lawitts and Department of Information Technology and Telecommunication Commissioner Cosgrave announced today that citywide installation of automated water meter reading technology has begun.

From Toilet To Tap Water

Alex and the crew travel to Saudi Arabia and talk to Noura Shehab, a Ph.D. student at King Abdullah University of Science and Technology (KAUST), about her research to use microbes to power sea water desalination.

The YSI Pro2030 Handheld Conductivity And DO Meter Video

The YSI Pro2030 Handheld Conductivity And DO Meter Video

The YSI Pro2030 DO/conductivity water quality meter is ideal for any field application. The instrument is rugged and extremely simple to use.

Video: UAT™ Membrane Filtration Systems

Video: UAT™ Membrane Filtration Systems

Using high quality components, the skid-mounted UAT systems are engineered to effectively produce treated water, free of particulate matter or contaminants
More 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:

  1. Source water for a community’s drinking water supply
  2. Drinking water treatment of source water
  3. 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.