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 Energy Efficient Treatment Process Helps Municipalities Meet New Class 1A Wastewater Standards in China |
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SIWW, Singapore, June 22, 2009 -
The VertiCel Process, an advanced biological nutrient removal technology from Siemens Water Technologies, has seen increased recognition in the Chinese municipal wastewater market. North China Municipal Engineering Design & Research Institute (NCMEDRI) and Tianjin Municipal Engineering Design & Research Institute (TMEDI) have recently accepted the process technology and selected it for their respective municipal wastewater treatment plant up-grade projects. The energy-efficient wastewater process not only meets stringent effluent requirements of China's new Class 1A standards for nitrogen and phosphorus removal, but is engineered to save space and energy.
The Design Institutes' acceptance was based on recent results of a large-scale, pilot plant in the city of Tianjin. Siemens Water Technologies supplied the VertiCel process to Tianjin Capital Environmental Protection Co., Ltd. (TJCEP) for the retrofit of one of its five existing 90,000 cubic meters per day (CMD) wastewater treatment trains at the Xianyang Road Wastewater Treatment Plant. The full-scale pilot system demonstrated the process as a cost-effective solution for upgrade of existing wastewater treatment infrastructure to meet the new Class 1A standards, the most stringent wastewater discharge requirements for the country's regulatory agency.
In its existing design, the anoxic oxidation process at the Xianyang Road wastewater treatment plant was unable to meet the new Class 1A Total Nitrogen (TN) discharge standards of 15 mg/l. There were several critical requirements for the plant upgrade: timing was critical due to a tight construction schedule; space was limited, so existing infrastructure needed to be used; and normal plant performance was essential during the construction of the new plant. In view of these challenges, the technology upgrade needed to meet both the discharge standards and also be easily retrofitted into the existing plant.
The VertiCel biological nutrient removal system combines mechanical aeration in the anoxic tank with diffused aeration in the aerobic zones optimizing process efficiency. Since the aerated anoxic processes used in the VertiCel process nitrifies throughout the entire process, it can be easily retrofitted into the existing tanks. In addition, the VertiCel system design consumes on average 30% less power when compared to traditional aeration systems. The flexibility of the system design allowed the TJCEP to adopt the process to meet its specific needs, while meeting effluent standards.
The pilot demonstration was completed in June 2009. Siemens was awarded the contract to update the 450,000 CMD Xianyang Road Treatment Plant.
Further information about solutions for water treatment is available at http://www.siemens.com/water
Image Introduction : VertiCel is a trademark of Siemens Water Technologies and its affiliates in some countries.
About Siemens AG Industry Sector
The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation, building and lighting technologies. With integrated automation technologies as well as comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six Divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 222,000 employees worldwide Siemens Industry posted in fiscal year 2008 a profit of EUR3.86 billion with revenues totaling EUR38 billion. www.siemens.com/industry
With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industrial Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities. Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle. With around 31,000 employees worldwide Siemens Industry Solutions achieved an order intake of EUR 8.415 billon in fiscal year 2008. Further information and downloads at: http://www.siemens.com/industry-solutions.
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