ThermoEnergy, AECOM to jointly pursue opportunities in municipal, industrial wastewater treatment

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LITTLE ROCK, AR, Dec. 7, 2009 -- ThermoEnergy Corporation announced today that the Company and AECOM have signed a non-exclusive Memorandum of Understanding to jointly pursue opportunities in areas of mutual interest within the municipal and industrial wastewater treatment industry in the U.S. and abroad. The initial project on which the two firms will be working together is the proposed ammonia recovery project, featuring ThermoEnergy's Ammonia Recovery Process ("ARP") technology, slated for New York City Department of Environmental Protection 26th Ward water pollution control plant. AECOM is one of the world's leading engineering, design, environmental and infrastructure planning companies, whose 45,000 employees are currently serving clients in over 100 countries.

"ThermoEnergy is pleased to be allied with a company of AECOM's stature and capabilities," said Dennis C. Cossey, CEO of ThermoEnergy, "and we very much look forward to expanding this relationship beyond the New York project, especially in the rapidly developing nitrogen/ammonia removal market." "Ammonia removal using our ARP technology is the focus of our initial interest," said Cossey, "and we have already identified at least five other potential municipal ammonia removal opportunities we plan to jointly pursue."

"As a global leader in the water and wastewater industry, AECOM has an obligation to support technology advancements that are energy and cost efficient," said Steven D. Guttenplan, Chief Technology Officer for Global Water. "Our partnership with ThermoEnergy advances this objective."

The ARP process is one of ThermoEnergy's premiere patented technologies, whose economic and environmental performance provide significant advantages over conventional ammonia removal technologies. When the City of New York recently published its intent to enter into a sole source contract with ThermoEnergy on the ARP project, the City described the ARP process as follows: when compared to currently employed biological treatment processes, ARP appears to be one of the more efficient means of removing ammonia from centrate, thus minimizing the release of nutrients to the surrounding waters of NYC, preventing fugitive emissions of Greenhouse gases released by wastewater treatment and consuming less available power.

About AECOM
AECOM is a global provider of professional technical and management support services to a broad range of markets, including transportation, facilities, environmental, energy, water and government. With approximately 45,000 employees around the world, AECOM is a leader in all of the key markets that it serves. AECOM provides a blend of global reach, local knowledge, innovation, and technical excellence in delivering solutions that enhance and sustain the world's built, natural, and social environments. A Fortune 500 company, AECOM serves clients in more than 100 countries and had revenue of $6.1 billion during its fiscal year 2009. Further information on AECOM can be found on their website: www.aecom.com.

About ThermoEnergy Corporation
ThermoEnergy is an integrated technologies company engaged in the worldwide commercialization of patented and/or proprietary municipal and industrial wastewater treatment and power generation technologies. The wastewater treatment technologies are consolidated in its subsidiary, CASTion Corporation ("CASTion"), a fast growing developer and manufacturer of innovative, custom-designed wastewater treatment and chemical recovery systems for industrial and municipal clients. The Company designs, assembles and ships its waste water treatment systems from a 20,000 square foot fabrication works located in Worcester, Massachusetts. The power generation technologies are consolidated in a subsidiary, ThermoEnergy Power Systems, LLC ("TEPS"). The economic and environmental matrix of the Company's technologies represents a paradigm shift in key infrastructure industries. The Company currently has offices in Little Rock, AR, Arlington, VA, Jacksonville, FL and New York, NY. Additional information on the Company and its technologies can be found on its website at www.thermoenergy.com/, or www.castion.com/ for wastewater treatment specific information.

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