Drinking Water Disinfection [Case Studies White Paper]

  1. Utah Water District Saves Time And Resources, Improves Accuracy By Upgrading Sensors And Analyzers
    7/20/2015

    Monitoring chlorine and fluoride levels in the drinking water of Utah’s Taylorsville-Bennion Improvement District used to be expensive, labor intensive, and often sensitive to interference from the vari­able frequency drives used to operate the chlorine injection pumps. That is, until the district upgraded to Rosemount free chlorine and fluoride sen­sors and analyzers from Emerson.

  2. Multi-Barrier Disinfection Strategy - New York City (Case Study)
    1/15/2014

    New York City is home to more than 8 million people, making it the most populous city in the United States. The majority of New York's drinking water is supplied by the Catskill/Delaware watershed, located approximately 100 miles outside the city. Historically, NYC has not filtered the water from this system, nor did they require any additional barriers to microbial contaminants due to the pristine nature of the watershed.

  3. THM Removal System Successfully Removes Over 65% Of THM Species In Water Storage Tank At The End Of 60 Mile Transmission Line
    7/16/2018

    In Canada and the western United States, long treated water transmission lines are frequently utilized to convey potable water to rural communities. These long transmission lines combined with chlorine for water disinfection can often create the requisite conditions for the formation of undesirable disinfection-byproducts (DBPs). One of the most common DBPs is a family of volatile compounds called Trihalomethanes (THMs) which are regulated in Canada to a level of 100 ppb (part-per-billion) annual average and in the US to a level of 80 ppb.

  4. Hydro-Guard Advanced Flushing System Simplifies Operations, Increases Water Quality And Saves Treatment Expenses
    4/24/2014

    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.

  5. Taste and Odor Treatment with UV-Oxidation - Mississauga, Ontario (Case Study)
    7/7/2010

    The Region of Peel is the second-largest Canadian municipality after the city of Toronto, and draws its drinking water from Lake Ontario — the smallest of the five Great Lakes. To meet the projected population increase from 1,160,000 people currently to an estimated 1,571,000 people in 2031, the Region decided to upgrade and expand its water treatment plant. To deal with seasonal taste and odor compounds produced by algae blooms in Lake Ontario, the membrane plant will be equipped with a Trojan UV-Oxidation system.

  6. Largest Ozone Facility In North America Meets Regulatory Requirements And Remediates Taste & Odor Problems
    9/5/2018

    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).

  7. Residual Control Technology Saves Millions Of Gallons Of Water While Maintaining Consistent Chloramine Residual Levels
    7/18/2018

    Like many cities within the Dallas-Fort Worth metroplex, the City of Coppell experienced water quality challenges at different periods throughout the year. In particular, the City had difficulty maintaining adequate chloramine residuals at the 1.5 MG Southwestern elevated storage tank during the warmer summer months when outdoor watering was restricted to conserve water.

  8. Philippines Potable Water System Improvement Project Uses Filter Underdrain Blocks To Improve Backwash Efficiency
    10/9/2018

    Founded in 1997, the Manila Water Company (MWC) serves the potable water needs of more than five million residents of the Philippines capital and cities to the east. The company serves as the private partner in a public-private partnership with the Philippines government in operating the Metropolitan Waterworks and Sewerage System for Metro Manila’s East Zone.

  9. Removing Iron, Arsenic and Manganese To Meet California Regulations
    10/9/2018

    Water from Well 19 and 20 in Sacramento, California area was high in manganese and arsenic. Due to the high levels, the wells were not being used to supply municipal water to the District. Each facility is planned to initially produce and treat approximately 600 gpm with a future expansion capacity to 1200 gpm.

  10. Hydro-Guard® Improves Water Quality And Saves Man-Hours For Central Texas Vacation Community
    3/10/2015

    The user population of a Central Texas resort system does not reach its peak until summer and the resultant levels of peak and low usage vary widely. This fluctuation impacts levels of disinfectant residual and, consequently, water quality — especially at the end of the line. Manual flushing of the utility's hydrants to maintain water quality has resulted in excessive time and labor as workers must access the outlying areas.