July Projects & Awards

Pepco to build biogas-fueled CHP plant; Ameresco and Philadelphia announce biogas project; St. Helens treatment plant gets energy efficiency award; Woodard & Curran acquires Cumming/Riter; American Water and Elizabeth, N.J., earn mayors’ award; Kruger wins AnoxKaldnes MBBR Contract; Atlas Copco wins bid for energy-efficient screw blowers; Headworks ships large screens to India

Pepco to build biogas-fueled CHP plant

Pepco Energy Services, a subsidiary of Pepco Holdings, signed an agreement with DC Water to design, build and operate a combined heat and power (CHP) plant at the 370 mgd Blue Plains Advanced Wastewater Treatment Plant (AWTP). The company will design and build the project for $81 million. It will produce at least 14 MW to supply nearly 30 percent of the plant’s average power demand.

The company will also provide on-site operations and maintenance valued at $89 million over 15 years. The new CHP plant will be part of DC Water’s thermal hydrolysis and anaerobic digestion project, which will be the largest in the world. Thermal hydrolysis uses high-pressure steam to increase the rate of biogas production and neutralize contaminants in waste streams. The CHP plant will include three Solar Mercury 50 low-NOx gas turbines.


Ameresco and Philadelphia announce biogas project

Ameresco and the Philadelphia Water Department agreed to design, build and maintain an innovative wastewater biogas-to-energy facility. The Northeast Water Pollution Control Plant Biogas Project will generate electricity and thermal energy for use on site, fueled mainly by digester gas. The $47.5 million construction project, designed to generate 5.6 MW of power, is expected to reduce energy costs by more than $12 million over 16 years. Ameresco will manage engineering, procurement, construction and maintenance. The project will reduce carbon emissions by nearly 22,000 tons per year.


St. Helens treatment plant gets energy efficiency award

SolarBee solar-powered mixers at the St. Helens (Ore.) Wastewater Treatment Plant have helped reduce aeration horsepower by more than 60 percent and save the city $100,000 compared to the previous year. The city received the Oregon Leaders Award for Industrial Energy Efficiency at the 4th Annual NW Industrial Energy Efficiency Summit in Portland in January.

St. Helens (population 13,000) and the town’s major industry, Boise Paper, share the wastewater treatment plant and its NPDES permit along with it. The two work together to operate the plant as effectively and efficiently as possible. A recent project to reduce the cost of aeration in the 42-acre secondary lagoon led to the installation of solar-powered, long-distance circulation mixers from SolarBee. The project qualified for a $70,000 rebate from the local electric utility with support from the Bonneville Power Administration’s Energy Smart Industrial (ESI) program.


Woodard & Curran acquires Cumming/Riter

Consulting and operations firm Woodard & Curran has acquired Cummings/Riter Consultants of Pittsburgh, a 32-person firm concentrating in corrective action work with associated services in environmental compliance and site development. The two firms have teamed on corrective action projects for the past 12 years. Besides its remediation practice, Cummings/Riter has a practice in the natural gas market, specifically the Pennsylvania shale gas market. The firm will operate as Cummings/Riter, a Woodard & Curran Company.


American Water and Elizabeth, N.J., earn mayors’ award

American Water and the City of Elizabeth (N.J.) water and wastewater systems earned the 2012 Outstanding Public/Private Partnership Award from the U.S. Conference of Mayors. The award honors achievements made possible through the combined effort of cities and the members of the Mayors Business Council. American Water and the city were honored for the positive results of a public-private partnership and significant improvements to the city’s water and wastewater systems.

Needing to upgrade its 100-year-old water infrastructure and 150-year-old wastewater system, the city entered two long-term contracts with American Water. In 1998, the city entered a 40-year concession contract with American Water’s market-based subsidiary to operate and maintain the water system. Later, the city entered a 20-year operation and maintenance contract with the company for the sewer system.

During the partnership, American Water has made more than $4 million in water-related infrastructure investments, including systemwide meter replacements, and 700 new fire hydrants. On the wastewater side, E’town Services operates the city’s combined sewer system and has invested $1.4 million to rehabilitate brick sewers.


Kruger wins AnoxKaldnes MBBR Contract

Kruger, a Veolia Water Solutions & Technologies company, won a contract from Fischer Construction to furnish a 0.82 mgd AnoxKaldnes moving bed biofilm reactor (MBBR) nitrification system for a Marbleton (Wyo.) Wastewater Treatment Plant upgrade. The MBBR LagoonGuard process will allow the existing lagoon system to meet strict ammonia limits year-round, even at winter temperatures.


Atlas Copco wins bid for energy-efficient screw blowers

The Town of Huntington on Long Island, N.Y., contracted with Atlas Copco for ZS75-K-900 low-pressure screw blowers for its wastewater treatment facility. The ZS series low-pressure blowers are designed for energy-efficient operation.


Headworks ships large screens to India

Headworks has shipped two huge Mahr bar screens to Maharashtra, India. Each screen is as tall as a five-story building, measuring 50 feet high and 11 feet wide. Raw materials used included 48,947 pounds of stainless steel sheet and plate metal, 15,248 pounds of screenfield bar, and 400 feet of chain.

The units will be installed at the intake of the Shahad River, 60 km northeast of Mumbai. The installation is being handled by Crystal Industrial Syndicate. Headworks was awarded the contract last fall by STEM Water Distribution and Infrastructure Company. Heavy debris from the Shahad River has been blocking and clogging the intake structure and transfer pumps at the local water treatment plant. The conditions demanded a bar screen with 10 mm spacings that could withstand flows up to 435 mgd.


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