February 2013, Vol. 25, No.2

Projects

Valero (San Antonio) selected Veolia Water Solutions and Technologies (Paris) to supply a complete boiler feedwater system to its St. Charles refinery in Norco, La. The treatment system will incorporate Veolia’s patented ACTIFLO® Turbo clarification technology to treat water from the Mississippi River. The clarified water will be used for cooling-tower makeup and service water, and also will supply water for the new high-purity boiler feedwater-treatment system.

 

The U.S. Geological Survey (USGS) last year announced that it selected AQUARIUS Software, manufactured by Aquatic Informatics (Vancouver, British Columbia), for water time-series data management. The new software replaces the Automated Data Processing System and several other legacy software packages USGS has used for time-series data processing.

By centralizing real-time operations on the AQUARIUS platform, the USGS Water Resources Division will optimize efficiency in the storage, processing, and publishing of hydrological data collected from its 7400 stream-gauging stations across the U.S.

USGS first chose a customized version of the software in 2005 to develop consistent, accurate, and defensible rating curves for computation of flow in streams and rivers within the United States; now, it will be making it the primary platform for hydrological data storage, processing, and publishing by 3,000 staff.

 

The City of Springfield, Ohio,and its consulting engineering firm Black & Veatch (Overland Park, Kan.) selected WesTech Engineering Inc. (Salt Lake City), through its subsidiary WWETCO, to supply the largest compressible-media filter in the world to the Springfield Wastewater Treatment Plant.

Installation of the 378,500-m3/d (100-mgd) WWETCO FlexFilter™ will begin at the facility this year. The filter will contain nearly 570 m3 (20,000 ft3) of compressible media and will be used 20 to 30 times a year as part of a high-rate treatment facility to treat combined sewer overflow events.

 

The City of Batesville, Ark., chose to add post-lagoon treatment for biochemical oxygen demand polishing and nitrification via moving-bed biofilm reactor technology at its water resource recovery facility. This project, which was awarded to Headworks BIO™ Inc. (Houston), is one of the largest lagoon nitrification projects in the U.S., according to a company press release.

The expansion requires that the facility increase flow capacity from 15,140 m3/d (4 mgd) to 34,065 m3/d (9 mgd) and decrease ammonia nitrogen levels to less than 8 mg/L at wastewater temperatures as low as 4.7°C.

Two additional parallel treatment trains will be built, each containing two reactors. The first reactor will treat any remaining biochemical oxygen demand, along with the ammonia nitrogen from the lagoons, and the second reactor will complete the nitrification process. The system will employ the proprietary high-surface-area ActiveCell® media to minimize its footprint. Clarification will be achieved through dissolved-air flotation.