Xylem mixers help cut treatment plant operational costs by 65 percent
Technology from Xylem Inc. reduced the energy consumption of a wastewater treatment plant in Italy by 65 percent. According to a comparison study conducted by Comopedur, which operates the plant, the company’s Flygt 4530 submersible mixers have saved 50,000 euros in annual operating costs. Located in Italy’s scenic Lake Como region, the plant treats 11.5 mgd, serving a population of 200,000. The new mixers, operating in a pre-denitrification tank, consume 175,000 kWh of electricity, versus 500,000 kWh for the old mixers they replaced.
Kruger upgrades township’s treatment capabilities with IFAS
Kruger, a subsidiary of Veolia Water Solutions & Technologies, won a contract with the Franklin Township Sewer Authority (FTSA) in Waynesburg, Pa., to retrofit the wastewater treatment plant with the AnoxKaldnes Integrated Fixed-Film Activated Sludge (IFAS) process. The process uses polyethylene carrier elements (media) added to the plant’s aeration basins. The media provides a large surface area to which beneficial microorganisms attach, forming a biofilm that supplements the activity of the suspended microorganisms. The result is an enhanced level of treatment in the same volume of tankage. The existing facility was rated at 1.25 mgd and consisted of submerged rotating biological contactors (SRBC) for organic removal followed by aerobic activated sludge tanks for partial nitrification in summer. The expansion will increase treatment capacity to 2.0 mgd and will meet the new year-round effluent ammonia nitrogen limits at the new design loads.
Severn Trent wins major contract for denitrification filter technology
Severn Trent Services won a contract from Archer Western Contractors to provide its TETRA Denite denitrification filter technology to the Back River Wastewater Treatment Plant in Baltimore, Md. The fixed-film biological denitrification process will reduce high levels of nutrients discharged into the Chesapeake Bay. Upon completion, the installation will be the world’s largest fixed-film denitrification system. The $24 million project will consist of 52 filters in four sets, each set operating independently. The facility will handle the plant’s permitted flow of 180 mgd. The design engineer for the project is Whitman, Requardt and Associates of Baltimore. After project completion, plant effluent will contain less than 5 mg/L TSS, less than 1.0 mg/L nitrate, less than 4.0 mg/L total nitrogen and less than 10 mg/L CBOD.
Synagro completes major biosolids composting facility
Synagro Technologies completed construction of a $4.3 million composting facility in Southwest Florida to process biosolids and green waste into Class AA compost. The facility will minimize environmental impact by using aerobic composting. The Class AA soil amendment will be marketed under the company’s AllGro brand, designed to cost less than synthetic fertilizers and to improve the physical structure of soil by introducing organic matter.
Victor Valley chooses Anaergia technology for MBR facilities
The Victor Valley Wastewater Reclamation Authority in Hesperia, Calif., chose the FibrePlate hybrid-membrane technology from Anaergia for two subregional membrane bioreactor (MBR) facilities. The facilities will be located in high-growth areas of the service region and produce a combined 2 mgd of high-quality effluent for landscape irrigation. Besides providing a drought-proof water supply, the MBR facilities will reduce the overall load on the collection system, enabling the authority to defer infrastructure expansion and reduce the energy costs of pumping recycled water. The FibrePlate technology combines the benefits of hollow-fiber membranes, including high packing density and backwash capability, with the low trans-membrane pressure and ease of operation of flat-sheet membranes. The results are lower capital and operating costs and high operating flexibility.
Terratec awarded biosolids contract for Cobourg
Terratec Environmental, a division of American Water’s market-based subsidiary American Water Enterprises, won a two-year, $260,000 contract with the Town of Cobourg, Ontario, for removal and land application of biosolids. The work consists of removal, transport and land application of about 13,000 cubic yards of biosolids from the town’s water pollution control plants.
Xylem to supply UV treatment for major European wastewater treatment facility
Xylem won a $2.75 million contract to supply Wedeco Duron UV technologies to a wastewater treatment facility in the Vigo region of southwest Spain. With a treatment capacity of 39 mgd, serving 800,000 residents, the facility will be Spain’s largest biofiltration and UV plant and one of the biggest in Europe. The Wedeco Duron technology includes an inclined lamp arrangement and highly efficient 600-watt Ecoray lamps.
Severn Trent enters partnership with Johnstown authority
The Johnstown (Pa.) Redevelopment Authority chose Severn Trent Services to provide operations and maintenance services for the Dornick Point Wastewater Treatment Plant through a public-private partnership. The five-year contract is projected to deliver nearly $500,000 per year in cost savings. The 12 mgd plant serves about 25,000 customers in Johnstown and 19 surrounding municipalities.
