Wastewater Contaminant Removal White Papers & Case Studies

  1. Standardizing On-Site Hypochlorite Generation Disinfection Technology In Water And Wastewater Treatment Plants Increases Safety And Eases Operations
    10/3/2018

    In late 2005, the City of Newberg, Oregon, decided to upgrade their water treatment plant disinfection process from gas chlorine to on-site hypochlorite generation (OSHG) in an effort to simplify operations and increase operator safety. The plant produced an average of 2.5 million gallons per day (MGD), with a peak capacity of 5 MGD.

  2. World’s Largest Denitrification Plant Helps Tampa Bay Reduce Nutrient Pollution
    10/2/2018

    Nutrient pollution is getting worse in many estuaries throughout the United States, especially those on the heavily populated East Coast.

  3. On-Site Sodium Hypochlorite Generation Replaces Hazardous Cyanide In Precious Metal Extraction
    10/2/2018

    The Baia Mare Aurul gold mine in North Western Romania suffered a historic catastrophe in January 2000, when its dam burst, streaming out 100,000 cubic meters of waste water, largely contaminated with cyanide, commonly used in the process of mining gold, into tributaries of the Tisza River, a major waterway in Hungary.

  4. Denitrification Filters Meet Strict, Varying Nitrogen Limits
    10/1/2018

    The cities of Littleton and Englewood, CO, just south of Denver, share a wastewater plant — the Littleton/Englewood advanced wastewater treatment (AWT) plant located in Englewood. The 7886 m3/hr (50-mgd) Littleton/Englewood AWT plant serves more than 300,000 residents in the Denver metropolitan area. The facility also receives sewage from 21 districts within a 75 square mile service area. Plant effluent is discharged to the Denver metro area’s major watershed, the South Platte River.

  5. Award-Winning Design Helps WWTP Protect Chesapeake Bay Watershed
    9/26/2018

    Arlington County’s Water Pollution Control Plant (WPCP) in South Arlington, VA, is located on 35 acres of land squeezed into a commercial/residential neighborhood less than a mile west of Ronald Reagan Washington National Airport. The facility treats flows from nearly all of Arlington. In addition, nearly 20 percent of the plant’s flow comes from neighboring localities such as Alexandria, Fairfax County, and Falls Church. Effluent from the plant is discharged into Four Mile Run to the south, which feeds into the Potomac River and, ultimately, the Chesapeake Bay.

  6. Methanol Dosing Technology Helps Denitrification System Pass Rigorous Performance Test
    9/25/2018

    In 2007, Greenville, SC-based Western Carolina Regional Sewer Authority (WCRSA) conducted a rigorous performance test on a new tertiary treatment technology to assess its ability to effectively remove nitrate-nitrogen (NO3-N) without using excess amounts of methanol at its Lower Reedy Wastewater Treatment Plant (WWTP).

  7. Denitrification/Filtration Technology Helps Wastewater Treatment Plant Meet China’s Stringent Class 1A Standards
    9/25/2018

    As a result of China’s rapid economic development in recent years, the country has implemented more stringent environmental standards. Local environmental protection departments now require most urban wastewater treatment plants (WWTP) to apply strict enforcement measures to meet Class IA effluent discharge standards according to the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002).

  8. Polymer Activation Equipment Upgrade Yields Consistent Polymer Savings Of Over 13%
    9/24/2018

    In an effort to lower operational costs and extend the life of the dewatering centrifuge, operators in Springboro, OH, began to look at the polymer activation equipment in use at the plant. The Polyblend® M-Series emulsion polymer activation systems had been in steady operation for over 10 years. The equipment still performed reliably, but operators were interested in ways to achieve greater efficiency. They were aware of the new Polyblend® Magnum mix chamber, with its enhanced two-zone mixing energy.

  9. Pure Oxygen Injection Into A Pipeline
    9/15/2018

    The Hagerstown Wastewater Treatment Plant in Maryland incorporated several plant modifications, one of which was the conversion of their disinfection process from the use of ozone to UV.

  10. Wastewater Plant In Como, Italy, Upgrades To De Nora Ozone For Significant Savings
    9/13/2018

    The Lariana Depur wastewater treatment plant in Fino Mornasco, Italy, treats wastewater from multiple textile manufacturers in the Como region, known as the heart of the textile industry. Since 1994, ozone has been used effectively as a polisher to remove the dark blue-purple color — the result of the dyes used in the textile dyeing and printing process — from the water.