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2007
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--Select 2007 News--
12-14.Cleveland Miss. Water System Scores Second Consec
11-16.Cities of Bristol Tennessee and Bristol Virgini
11-14.Thomas M. Mills Severn Trent Services Marketing a
11-12.Severn Trent Water International Ltd Reorganizes C
10-31.STS Provides Reverse Osmosis Electrodeionization S
10-29.Severn Trent De Nora Receives U.S. Patent for its
10-11.Severn Trent Services Introduces Intelligent Gas F
10-10.Keeping the Water Flowing at Catterick
10-2.Severn Trent Introduces Standardized ClorTec On Si
9-27.Tampa Bay World s Largest Denitrification Plant
8-28.Reverse Osmosis Selected for New Treatment Facilit
8-27.SmartMeter Water Meters Shown to Prevent Water Re
8-23.Severn Trent Services Introduces New Battery for S
8-21.TETRA DeepBed Filtration Technology Wins Earle B
8-14.New Trial Package for SmartMeter C100R Concentric
7-18.STS to Provide 46 ClorTec On site Sodium Hypochlo
7-11.STS UV Disinfection System Receives Validation Tes
6-26.New Branch Office in Abu Dhabi United Arab Emirat
6-21.STS Provides Arsenic Removal Technology for City o
6-13.OMNIPURE and MARINER OMNIPURE Product Lines Rece
6-12.New Mini Chlorine Dioxide Unit an Ideal Solution f
6-11.Gary Moyer to Assist Severn Trent Management Servi
6-8.Standardized Dry Chlorine Emergency Scrubber Featu
6-6.Severn Trent Services Acquires the Business of Qua
6-6.Firma Severn Trent Services przejmuje firme Quay T
6-1.STS Awarded Contract to Supply Filters for Queensl
5-29.STL Launch New Rapid Detection Legionella Method
5-29.Severn Trent Laboratories Midlands Laboratory Rec
5-29.STL Join Institute of Customer Services
5-4.Severn Trent Metering Services Seek European Distr
4-13.Severn Trent Services Launches New Web Site
3-30.U.K. Water Utility Selects Severn Trent Services t
3-20.Severn Trent Services Selected to Provide Tertiary
3-13.Severn Trent De Nora Launches New Web Site
3-2.Severn Trent Services Receives Texas Water Utiliti
2-22.STWI Guyana Statement
2-9.SmartMeter Water Meters Receive Measuring Instrum
1-30.City of La Vergne Tennessee Partners with Severn T
1-17.Severn Trent Management Services Opens New Office
1-15.Severn Trent De Nora Introduces Compact MARINER OM
1-12.Severn Trent Services Introduces A Flex Capital Le
1-2.Severn Trent Services Receives U.S. Patent for its
Tampa Bay World s Largest Denitrification Plant Utilizes Severn Trent Services Technology
Thursday, September 27, 2007
http://www.severntrentservices.com/Denitrification/Denite__System_prod_173.aspx
Tampa-Bay--World-s-Largest-Denitrification-Plant--Utilizes-Severn-Trent-Services-Technology.pdf
A Severn Trent Services
denitrification system
is reducing nitrate-nitrogen (NO3-N) and suspended solids to meet stringent government standards at the world’s largest denitrification plant located in Tampa, Fla. According to the plant’s manager, Phillip Clark, the Howard Curren Advanced Wastewater Treatment Plant can claim much of the credit for the reduced nutrient pollution in the Tampa Bay estuary, which was praised in a July 2007 report by the National Oceanic & Atmospheric Administration (NOAA).
Nutrients such as phosphorus and nitrogen trigger algae blooms and reduce the amount of oxygen in waterways. The NOAA report, “Effects of Nutrient Enrichment in the Nation’s Estuaries: A Decade of Change, National Estuarine Eutrophication Assessment Update,” said the increased nutrient pollution in U.S. estuaries is linked to human activities upstream from the waterways. However, while nutrient pollution is getting worse in many U.S. estuaries, the NOAA report cited the Tampa Bay estuary as an example of how aggressive nutrient management can reverse the trend of increased nutrient pollution.
The Howard Curren plant utilizes a
TETRA® Denite®
denitrification system first installed in 1978 and expanded in 1992. The fixed-film biological denitrification process removes NO3-N and suspended solids (SS) in a single treatment step. The system can also be integrated with other plant treatment processes to provide superior total nitrogen (TN) and phosphorus removal. Denite is used as the final treatment step in a total nitrogen removal process to help a facility meet stringent TN discharge limits of less than 3 mg/l.
The improvement in filtered effluent quality of the large flow from this plant has been a documented factor in the revitalization of Tampa Bay over the last few decades. Sea grasses and sport fish have returned to once barren areas of the waterway.
Ten years of effluent data (1997-2006) reveal the following results: average flow of 55.43 million gallons/day; biological oxygen demand of 2.52 milligrams/liter (mg/L); total nitrogen of 2.46 mg/L; and total suspended solids of 0.93 mg/L.
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