August 2012, Vol. 24, No.8

Projects

In May, the Haines City (Fla.) Wastewater Treatment Facility commissioned a new system to recycle its wastewater residuals to produce a natural, high-quality product for agriculture use. The 11,400-m3/d (3-mgd) facility installed a Neutralizer, manufactured by BCR Environmental Corp. (Jacksonville, Fla.).

The treatment process is a two-stage patented chemical treatment system. The processing time is 8 hours. The system’s treated solids have been registered as a commercial fertilizer with the Florida Department of Agriculture. The system was retrofitted into the existing treatment plant and is predicted to enable the city to save $100,000 annually in operating costs, avoid $2.7 million in capital expenditures, and reduce the amount of material disposed of in landfills.

 

The Patchogue (N.Y.) Wastewater Treatment Plant, located on the southern shore of Long Island, has installed two STM-Aerotor™ biological nutrient removal systems and two 17-m-diameter (55-ft-diameter) secondary clarifiers featuring the proprietary Clarifier Optimization Package (COP™) design manufactured by WesTech Engineering Inc. (Salt Lake City).

The Patchogue plant had a peak flow capacity of 1890 m3/d (0.5 mgd). The new systems and clarifiers are part of an expansion that has increased plant capacity to 3000 m3/d (0.8 mgd), with provisions for near-term expansion to 4500 m3/d (1.2 mgd) to meet increased population growth.

The systems have worked together to reduce carbonaceous biochemical oxygen demand, total suspended solids, and total nitrogen to well below the mandated levels, making the Patchogue plant one of the most efficient in the state.

 

Hanson Pipe & Precast (Irving, Texas), a manufacturer of concrete pipe and precast products, was selected to provide more than 10,060 m (33,000 ft) of reinforced-concrete pipe and 13,100 m (43,000 ft) of reinforced-concrete box culverts for Segment E of the Grand Parkway project near Houston. These products will manage basic stormwater runoff between two major thoroughfares, Interstate 10 and Highway 290. They will prevent flooding and keep traffic flow moving during heavy-rain days. The 24-km (15-mi) stretch from Katy Freeway to Northwest Freeway will be a four-lane, controlled-access toll road that serves as part of a larger loop surrounding the greater Houston area.

Construction for the project began in September 2011 and is projected to be completed in January 2014.

 

The Belmont Advanced Wastewater Treatment Plant in Indianapolis has chosen to purchase new bar screens for its preliminary treatment. Headworks® Inc. (Houston) will design and fabricate the five Mahr® bar screens for the plant.

The five new multiple-rake bar screens will measure 6.4-m-high (21-ft-high) by 2.4-m-wide (8-ft-wide). They will have 9.5-mm (0.375-in.) bar spacing, and each will be designed to withstand peak flows of 312,300 m3/d (82.5 mgd). Startup is expected to be completed by the end of this month.

The Belmont plant serves more than 449,000 homes and businesses in Indianapolis and surrounding communities. The plant is connected to a combined sewer system and, when operating at full capacity, can provide primary treatment to as much as 1.1 million m3/d (300 mgd).

 

ThermoEnergy Corp. (Worcester, Mass.) announced that it will deploy a ThermoEnergy ARP™ (Ammonia Recovery Process) system at a biogas production plant outside of Amsterdam. The ARP system will be owned and operated by ThermoEnergy and its partner in the Netherlands, ProfiNutrients BV.

The ARP system will be used to recover ammonia from anaerobic digester wastewater and convert it into ammonium sulfate fertilizer for European agricultural markets. The process is environmentally friendly, and the fertilizer product will meet all European Union regulatory standards. The unit is expected to start operating this month.

 

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