DRINKING WATER TREATMENT

Reconditioned And Rehabbed Filters Succeed At Large Treatment Plant
Reconditioned And Rehabbed Filters Succeed At Large Treatment Plant

A large treatment plant includes several treatment processes that contribute to providing quality recycled water pursuant to the state of California Title 22 regulations. Major treatment processes include raw wastewater pumping, preliminary treatment, primary treatment, secondary treatment, tertiary treatment with Parkson DynaSand® filters, and disinfection.

DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS

  • Dissolved Air Flotation Technology Nearly Doubles Treatment Capacity
    Dissolved Air Flotation Technology Nearly Doubles Treatment Capacity

    Faced with a tight capital budget, a city in British Columbia required a new design for a water treatment plant capable of a maximum daily water production of 21 MPG during peak demand periods, with an ultimate demand of 29 MGD.

  • Using Advanced Control Valves To Prevent Broken Mains And Reduce Water Loss
    Using Advanced Control Valves To Prevent Broken Mains And Reduce Water Loss

    The same scenario plays out daily at water utilities across the country. Water pressure begins to drop during morning hours as customers wake to prepare for their day. As demand decreases throughout the evening hours, system pressures creep up, hitting their highest levels in the early morning hours. This often leads to main breaks. Advanced control valves can be engineered to address this as well as many other problems faced by distribution system managers.

  • Flow Data Red Flags: When To Act

    Accurate flow measurement is critical to most water and wastewater processes. Red flags may pop up to indicate meter problems, but which ones should lead you to act — and when? The answer depends on the type of meter, what it is used for, and whether the readings are local or remote.

  • Case Study: Improving RO Performance
    Case Study: Improving RO Performance

    The client's reverse osmosis system utilized coagulants, antiscalants and cleaners to produce high quality water. With the current chemicals, the reverse osmosis system was cleaned every 90 days due to scaling or deposits.

  • UV Disinfection Eliminates Groundwater-Borne Pathogens At Water Utility
    UV Disinfection Eliminates Groundwater-Borne Pathogens At Water Utility

    A study led by the Marshfield Clinic Research Foundation set out to prove the growing evidence 'that our groundwater is fairly heavily contaminated with human pathogenic viruses.'

  • Aquatech Supplies Zero Liquid Discharge System In Puerto Rico Due To Environmental Regulations

    AES Puerto Rico Cogeneration Plant (AESPR) is a cogeneration power plant that produces 454 MW of net electricity in its fluidized bed boiler plant in Guayama, which is sold to the Puerto Rico Electric Power Authority (PREPA).

  • Decoding Ozone Disinfection
    Decoding Ozone Disinfection

    Disinfection is by far the most common use for ozone in water and wastewater treatment applications. The basics of ozone dosing / sizing have been discussed at length in any number of our previous articles. In this article, we are trying to provide better insight into decoding the why’s and how’s of your next ozone disinfection application. By Louis LeBrun, PE Thoram Charanda

  • Largest Ozone Facility In North America Meets Regulatory Requirements And Remediates Taste & Odor Problems
    Largest Ozone Facility In North America Meets Regulatory Requirements And Remediates Taste & Odor Problems

    The North Texas Metropolitan Water District began working to add ozone to its four interconnected water treatment facilities which operate as the Wylie Water Treatment Plant (WTP).

  • Integrated Automation Solution Eases Water And Wastewater Operations
    Integrated Automation Solution Eases Water And Wastewater Operations

    The water and wastewater industries face challenges at every turn — from population growth to strict environmental and financial regulations to downsizing. The complex nature of both industries puts a great deal of pressure on plant operators, who typically tackle tasks manually. Download this datasheet to learn how integrated automation software delivers improved reliability and flexibility throughout the entire operation. 

  • Water Metering Supports Sustainable Water Management Solutions
    Water Metering Supports Sustainable Water Management Solutions

    The term “carbon footprint” has been on everyone’s lips since the start of the climate change discussion. Very few industries can claim that they play no part in impacting the carbon footprint — either for good or bad. This is also true for the water and wastewater industry that will have to take a closer look at increasing the efficiency of their facilities to reduce their carbon footprint.

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DRINKING WATER TREATMENT APPLICATION NOTES

  • Application Note: Low-Flow Sampling Of Water Quality Parameters Used In Determining Groundwater Stability
    Application Note: Low-Flow Sampling Of Water Quality Parameters Used In Determining Groundwater Stability In April 1996, the U.S. EPA developed and published a document entitled Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures. The document states that “the most common ground water purging and sampling methodology is to purge wells using bailers or high speed pumps to remove 3 to 5 casing volumes followed by sample collection.” Adverse impacts can occur through this method affecting sample quality by increasing levels of turbidity. These problems can often be mitigated by using low-flow purging and sampling to reduce sampling-induced turbidity. By YSI
  • Ultrasonic Level Measurement In Water And Wastewater Plants
    Ultrasonic Level Measurement In Water And Wastewater Plants

    Radar technology is often viewed as the “best” method of level measurement, but this isn’t necessarily true in the water industry.

  • Flow Meter Enhances Chlorination System Performance For Municipal Water Department
    Flow Meter Enhances Chlorination System Performance For Municipal Water Department

    The water municipality at a mid-size city in the Western region of the U.S. serving a population of about 180,000 people needed to address a chlorine disinfection system problem at one of its water treatment plants.

  • Application Note: Simultaneous Determination Of Total Bound Nitrogen (TNb) And Total Organic Carbon (TOC) In Aqueous Samples Total bound nitrogen (TNb) consists of dissolved ammonia, nitrates, nitrites, amines, and other organic nitrogen-containing compounds. TNb measurements represent an alternative to Total Kjeldahl Nitrogen (TKN) analysis for rapid screening of industrial wastewater, drinking water,agricultural run-off, and surface waters. By OI Analytical
  • Free Chlorine Measurement In Drinking Water Treatment

    Before water can be used as a safe and reliable source for drinking water, it must be properly treated. Since water is a universal solvent, it comes in contact with several different pathogens, some of which are potentially lethal, and inactivation is accomplished through chemical disinfection and mechanical filtration treatment. This treatment consists of coarse filtration to remove large objects and pre-treatment which includes disinfection using chlorine or ozone

  • Hach FilterTrak 660™ Sc Laser Nephelometer Even More Practical For Ultra-Low Turbidity Monitoring
    Hach FilterTrak 660™ Sc Laser Nephelometer Even More Practical For Ultra-Low Turbidity Monitoring

    Now compatible with the Hach sc100 Controller, the FilterTrak 660 sc Nephelometer connects as a ‘plug and play’ sensor with the universal, dualchannel controller that features an inherent power supply.

  • 3M™ Liqui-Cel™ Membrane Contactor Technology Being Evaluated For Dissolved Gas Removal From Water In Many Hydrocarbon Processes
    3M™ Liqui-Cel™ Membrane Contactor Technology Being Evaluated For Dissolved Gas Removal From Water In Many Hydrocarbon Processes

    The oil and gas industry has utilized various deaeration technologies for many years to remove dissolved gases, particularly oxygen, from injection water. In many hydrocarbon recovery and water processes, degassing is necessary in order to minimize environmental impact, improve operating efficiency, avoid process issues and help protect system components.

  • Chlorine Method For UKAS Accreditation And DWI Compliance At Welsh Water
    Chlorine Method For UKAS Accreditation And DWI Compliance At Welsh Water

    In 2013 the Drinking Water Inspectorate for England & Wales announced that water samples collected in England and Wales must be tested in a laboratory that meets specific standards for drinking water sampling and analysis. At the time of the new instruction, the chlorine method employed at the Welsh Water Bretton laboratory was unable to meet these requirements, notably for the prescribed limit of detection. This prompted the laboratory to investigate new analytical options for monitoring residual chlorine.

  • 3M™ Liqui-Cel™ Membrane Contactors Improve Water Quality and EDI Performance
    3M™ Liqui-Cel™ Membrane Contactors Improve Water Quality and EDI Performance

    Electrodeionization (EDI) is a widely used water treatment process. EDI technology is an electrochemical process that uses ion selective membranes and an electrical current to continuously remove ions from water. The process uses ion exchange resin to remove the ions from the feed stream, producing pure water.

  • Improved Determination Of Volatile Organic Compounds In Water By SPME And GC/MS
    Improved Determination Of Volatile Organic Compounds In Water By SPME And GC/MS

    The analysis of water for volatile organic compounds is important due to their toxicity. The current methods for this determination lack of sensitivity, selectivity or capability for automation. This paper presents the new ISO 17943 Standard using Solid Phase Microextraction (SPME) and GC/MS. The sample preparation by SPME enables limits of detection and easy automation of the whole method. GC/MS provides the required sensitivity and selectivity. This ISO Standard was validated by an interlaboratory trial, which results confirm the outstanding performance for this method.

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DRINKING WATER TREATMENT PRODUCTS

Capital Controls® Series 71P11A Gas Pressure Reducing Valve Capital Controls® Series 71P11A Gas Pressure Reducing Valve

The Series 71P11A Gas Pressure Reducing and Shutoff Valve is a diaphragm-type gas pressure regulating valve designed for use on chlorine, sulfur dioxide and ammonia gas service. The valve is used in a gas dispensing system to prevent liquefaction of the gas by providing a controlled pressure drop in the piping system. Downstream pressure is regulated to a reduced value by adjustment of the control setting. If the downstream pressure exceeds the pressure at which the valve is set, gas flow will be shut off.

Leopold Engineered Filter Media Leopold Engineered Filter Media

Located in Watsontown, Pennsylvania, the Leopold facility carries more than 5,000 tons of premium NSF 61 approved anthracite in more than 25 different ES and UC combinations - ready for quick delivery worldwide. All anthracite purchases can be independently sampled and tested prior to shipment. Tamper proof seals can also be installed by the purchaser on all anthracite immediately after sampling.

Carbon Systems Carbon Systems

Loprest designs and manufactures granular activated carbon (GAC) treatment systems for taste and odor applications, chlorine removal, PFC’s, 1 2 3 TCP, PCE/TCE, 1 4 dioxane, and many other contaminants. Loprest has a long, successful history in the selection and application of the proper carbon media for the application.

Hydrex Water Treatment Chemicals Hydrex Water Treatment Chemicals

The HYDREX™ range includes both organic and inorganic chemicals formulated to meet the specifications of customers in the industrial and municipal sectors including effluent and sludge treatment.

Singer™ Model 106 / 206 PGM-2PR-630-SM Pressure Management Valve With Integral Backup Singer™ Model 106 / 206 PGM-2PR-630-SM Pressure Management Valve With Integral Backup

A simple valve package that saves both water and money, the Model 106 / 206 PGM-2PR-630-SM is an extension of the 2PR-630 pressure management valve with safety back-up.

MARINER OMNIPURE® Marine Sanitation Devices MARINER OMNIPURE® Marine Sanitation Devices

The MARINER OMNIPURE® series of Marine Sanitation Devices offer a fresh approach to sewage treatment in the workboat vessel market. With treatment capacities of up to 60 persons (black water) and up to 25 persons (black and gray), the largest unit treats 1,796 gallons (6,800 Liters) of human wastewater per day. The USCG Certified Type II MARINER OMNIPURE units incorporate the same electrolytic treatment benefits of any other OMNIPURE unit, but with the added advantages of less maintenance and a small, compact size to fit vessels in the workboat vessel market.

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LATEST INSIGHTS ON DRINKING WATER TREATMENT

More Drinking Water Treatment Insights

DRINKING WATER TREATMENT VIDEOS

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.

Kupferle Foundry - #9800i-GENESIS Turbine Powered Automatic Flushing Device With Chlorine Analyzer

The Eclipse i-Series model #9800i-GENESIS is the newest Intelligent Flushing & Monitoring Station Kupferle offers to maintain safe residual levels and remove DBPs from consumers' water. This permanently installed station incorporates a built-in chlorine analyzer to measure and record disinfectant residual levels based on a programmed sampling schedule.

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.

Drought Forum Webinar: The Growing Demand For Re-Used And Brackish Water Drought Forum Webinar: The Growing Demand For Re-Used And Brackish Water

The Western Governors' Drought Forum webinar “Once Marginal, Now Crucial: The Growing Demand for Re-used, Produced, and Brackish Water” explores the technological and regulatory obstacles to utilizing re-used, produced, and brackish water.

People Drink Sewage Water For The First Time

Rather drink sewage water than LA tap water any day.

More 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.