October 2013, Vol. 25, No.10


Tampa Bay (Fla.) Housing Authority installed a stormwater management and rainwater harvesting system and a solar panel array at its ultragreen inner-city development in Tampa. The stormwater management system is located under the new community park. It controls and harvests stormwater runoff to irrigate the new green space.  

Oldcastle Precast (Auburn, Wash.) designed and provided the modular underground retention structure for the new stormwater management system, which was engineered by Cardno TBE (Clearwater, Fla.). The system will store, treat, and harvest stormwater runoff on the 11-ha (28-ac) site. The precast-concrete retention system manages and controls the volume and discharge timing of stormwater runoff. The engineered design maximizes storage volume while minimizing the project’s footprint and cost. Furthermore, the design allowed for a quick and efficient installation. 

The 1672-m2 (18,000-ft2) stormwater-retention-harvesting system includes a Storm Capture® vault composed of 250-mm-tall (10-in.-tall) Storm Capture modules that can hold up to 934 m3 (33,000 ft3) of water before recycling it for irrigation use, two nutrient-separating baffle boxes by Suntree Technologies (Cocoa, Fla.) with adjacent sediment chambers for pretreatment, and harvesting and irrigation equipment assembly by John Deere Green Tech (Irvine, Calif.). All surface stormwater is collected from the site, piped into the baffle boxes and sediment chambers, and stored in the Storm Capture modules for irrigating the site landscape. 

KSB (Frankenthal, Germany), a supplier of pumps and pumping equipment, is supporting flood relief efforts in the city of Halle, Germany. Entire streets were flooded and tens of thousands of Halle residents faced the threat of evacuation, so KSB helped by providing pumps and food supplies. About 30,000 residents of Halle–Neustadt were told to evacuate their homes, as two local dikes were in danger of being breached. The facility where KSB’s wastewater products are made is located in Halle; however, the KSB facility, which is located on higher ground, was not at risk from the flooding.  


The Village of Bloomingdale, Mich., awarded a contract to Biowater Technology (Tonsberg, Norway), a provider and manufacturer of advanced biological wastewater treatment processes and equipment for municipal and industrial facilities, to supply a Complete Mix Fixed Film (CMFF®) biological treatment process.   

Bloomingdale’s water resource recovery facility has unique challenges associated with seasonal fluctuations from regional school and food-processor discharges. The existing lagoon could not meet new ammonia limits, and the cold weather in Bloomingdale has a significant impact on wastewater treatment efficiencies. Removing such contaminants as biochemical oxygen demand, total suspended solids, and other nutrients from wastewater is necessary regardless of weather conditions. 

The municipality selected CMFF, which is based on the moving-bed biofilm reactor concept. Bloomingdale decided a three-stage aerobic CMFF process followed by gravity clarification design would be the best solution to overcome the challenges of seasonal fluctuations and cold temperatures. 


Kruger Inc. (Montreal), a subsidiary of Veolia Water Solutions & Technologies (Paris), was awarded a contract to provide a Hydrotech Discfilter system for the upgrade and expansion of the Village of Maybrook, N.Y., water resource recovery facility project. The Maybrook facility will expand its capacity and be upgraded to meet more-stringent State Pollutant Discharge Elimination System requirements. The Hydrotech Discfilter system, which will consist of two units, each sized to treat a peak flow of 6813 m3/d (1.8 mgd), is designed to provide an effluent total suspended solids of less than or equal to 5 mg/L. The facility will continue to discharge to a tributary of Otter Kill Creek.  

Spanish water company Cadagua (Bilbao, Spain) was selected to retrofit its Valdelentisco desalination facility with PX® technology by Energy Recovery Inc. (San Leandro, Calif.), an industry leader in capturing reusable energy from industrial fluid flows and pressure cycles.   

Phase 1 of this new project, which involves a retrofit of two reverse-osmosis trains, is one of many joint projects by Cadagua and Energy Recovery. Part of a larger trend to retrofit desalination plants around the world, this project highlights the viability and sustainability of desalination as a solution to the ever-growing strain on available freshwater resources. By retrofitting and upgrading technology, facilities and municipalities can save money and increase efficiencies.  

Cadagua chose the PX technology not only because of the estimated annual savings for Phase 1 but because the facility will not have to replace its existing pump system, adding to the overall increase in savings. 

Located in southeastern Spain, the Valdelentisco desalination facility has a potable- and irrigation-water production capacity of 140,000 m3/d, making it one of the largest desalination facilities in Europe. 


Parkson Corp. (Fort Lauderdale, Fla.) upgraded a water-recycling facility in Hawaii with the MaximOS™ sodium hypochlorite, onsite-generation disinfection system that is designed to deliver immediate operating cost savings while maintaining the highest water quality standards.   

The upgrade is a result of Parkson’s partnership with the water-recycling facility operator as part of a public–private partnership with local authorities in Oahu. 

Operators chose MaximOS to replace the existing sodium hypochlorite system, which incurred a substantial cost burden because of the high price of chemicals on the island. By transitioning to the Parkson system, which relies on common salt, the facility will realize substantial operational savings. 

The upgrade includes four MaximOS units that use self-cleaning electrolytic cells to ensure proactive maintenance. In this configuration, the unit delivers long life cycles and ease of operations, in part because it does not require acid-washing during normal maintenance. The latest generation of MaximOS models places a premium on self-sufficiency to minimize the amount of labor needed for operations and care. 

The 49,210-m3/d (13-mgd) facility relies on MaximOS and other technologies to facilitate irrigation by the municipal government and supply process water for a power plant and oil refinery.

AZ Water Association recently awarded the Ak-Chin Indian Community’s surface water treatment plant, featuring the GE Water & Process Technologies (Trevose, Pa.) ZeeWeed 500 advanced treatment technology, with the 2013 Water Project of the Year Award. The new plant, commissioned in 2012, has a capacity of 8516 m3/d (2.25 mgd) and provides drinking water to community members and Harrah’s (Las Vegas) Ak-Chin Casino. It also provides sufficient capacity to meet the needs of existing commercial operations, as well as future expansions.   

It is the first surface water treatment plant for the Ak-Chin Indian Community, located in the Santa Cruz Valley of southern Arizona. The plant takes advantage of its surface water allotment of Colorado River water supplied via the Maricopa–Stanfield canal system and the Central Arizona Project canal, which gives it a secure source of water, allowing for the population to properly plan for future growth and expansion. 

The company also provided the technology for the Ak-Chin Indian Community’s nearby membrane bioreactor water resource recovery facility (WRRF), which provides Arizona Class A+ effluent for water reuse and recharge. The WRRF won an international award and multiple state awards. Carollo Engineers (Walnut Creek, Calif.) is responsible for the award-winning facilities.