News | September 2, 2015

Xylem To Support The Long-Term Sustainability Of Chesapeake Bay

Source: Leopold -- A Xylem Brand
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Xylem Inc., a leading global water technology company dedicated to solving the world’s most challenging water issues, has been awarded a contract to provide an existing wastewater treatment plant with advanced treatment technology, which will play a key role in an initiative focused on improving water quality in the Chesapeake Bay.

The City of Frederick, Maryland, is a contributor to the Chesapeake Bay watershed, the water quality of which is being damaged due to excess nutrients entering the system. These nutrients fuel the growth of algae blooms, which in large quantities can block sunlight to underwater grasses and remove oxygen from the water preventing the bay from acting as a healthy ecosystem.

Marc Stachowski, Deputy Director of Public Works for the City of Frederick said, “The Chesapeake Bay area is a unique ecosystem that needs to be protected. It is our goal to comply with the requirements of the Chesapeake Bay Initiative Enhanced Nutrient Removal program and, as part of this process, the city is converting a key element of its water treatment process from chemical (chlorine) to ultraviolet (UV) disinfection. Xylem is supporting this project by developing innovative and sustainable ways to reduce the levels of nitrate nitrogen and total phosphorus in the water before it is discharged into the Chesapeake Bay.”

Greg Claffey, Xylem’s Director of Treatment Sales for North America, said, “We are pleased that our technology and expertise will support the long-term sustainability of this important waterway. By switching from chlorine to UV disinfection, the City of Frederick will reduce the disinfection by-products going back into receiving streams. Furthermore, the removal of chlorine makes the site and the surrounding community a safer place to live and work.”

Xylem will also provide training and service support to the facility’s operators as the plant shifts from chlorine to UV disinfection to ensure a smooth and efficient transition.

Construction is scheduled to take place later this year with the plant scheduled to be in operation in mid-2017.

The Xylem solutions that will be used in this project include a Leopold elimi-NITE denitrification system, Sanitaire Silver Series II membrane disc diffusers and Wedeco’s TAK 55 UV disinfection system.

Leopold’s elimi-NITE deep bed filter system will use methanol as a carbon source to grow biology within the filter bed to reduce nitrate nitrogen to less than 1 mg/l (milligram/litre). Total Phosphorus levels will be reduced through the system to levels of less than 0.3 mg/l TP (Total Phosphorus). The Sanitaire aeration systems will be installed in swing zone tankage, anoxic/equalisation tankage and the effluent channel at the plant for purposes of secondary treatment and oxidation of organic material as well ammonia removal.

About Xylem
Xylem (XYL) is a leading global water technology provider, enabling customers to transport, treat, test and efficiently use water in public utility, residential and commercial building services, industrial and agricultural settings. The company does business in more than 150 countries through a number of market-leading product brands, and its people bring broad applications expertise with a strong focus on finding local solutions to the world’s most challenging water and wastewater problems. Xylem is headquartered in Rye Brook, N.Y., with 2014 revenues of $3.9B and approximately 12,500 employees worldwide. Xylem was named to the Dow Jones Sustainability Index for the last three years for advancing sustainable business practices and solutions worldwide.

The name Xylem is derived from classical Greek and is the tissue that transports water in plants, highlighting the engineering efficiency of our water-centric business by linking it with the best water transportation of all -- that which occurs in nature. For more information, visit

SOURCE: Leopold -- A Xylem Brand