일괄청부, 건설 관리, 설계 업무 전문화 기업인 PC Construction은 워싱턴 D.C의 DC Water Blue Plains Advanced Wastewater Treatment Plant의 6천만 달러의 여과 처리 시설 완공과 Suwanee에 위치한 2천800만 달러의 물 정화 시설 위해 서비스를 제공할 예정이다.
DC Water Blue Plains Advanced Wastewater Treatment 의 주요 목적은 폐수에서 질소를 제거하기 위해 사용되는 DEMON 공정의 완성이다. 완성 시 세계에서 가장 큰 DEMON 시설이 된다.

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Cities of DC, Atlanta to receive major innovative wastewater treatment facilties

PC Construction, a company specializing in general contracting, construction management and design-build work, will provide its services to complete a $60-million filtrate treatment facility at the DC Water Blue Plains Advanced Wastewater Treatment Plant in Washington, D.C., as well as a $28-million water reclamation facility located in the city of Suwanee, Ga.

DC Water: Blue Plains Advanced Wastewater Treatment Plant
One of the highlights of the DC Water Blue Plains Advanced Wastewater Treatment Plant project is the implementation of the DEMON® process, a method used to eliminate nitrogen from wastewater. Upon completion, the project will be the largest DEMON facility in the world.

DEMON, which is an acronym for Deammonification, employs specialized natural ammonia-oxidizing bacteria to metabolize and remove nitrogen from the recycle stream coming off the plant's sludge dewatering facilities. The outcome is significant energy savings -- 50 percent for nitrification, 100 percent on carbon source -- when compared to traditional nitrogen removal processes.

Construction at the new treatment plant follows an extensive pilot program to ensure environmental and cost benefits of implementing the process on this scale. Savings include reductions in energy demand by more than 70 percent and the elimination of costly supplemental chemicals used in the conventional approach.

Identified as one the best ways to reduce energy and chemicals usage in a filtration process, DEMON has been adopted by more than 20 facilities in Europe and has started to gain traction in the United States.

[출처 = Water World / 2014년 5월 19일]