Siemens signs China contract

Siemens Water Technologies & Engineering (Tianjin) Co has signed a 4.2M Euro contract with Tianjin Capital Environmental Protection Group Co (TCEPC) in China to provide a Biological Nutrient Removal (BNR) system. This will be retrofitted to upgrade the facilities at Tianjin Xianyang Road Wastewater Treatment Plant.

According to Siemens, the new BNR system will treat 450,000m3 of wastewater a day, significantly improving the effluent discharge of Xianyang Road WwTP from the national standard of Class II to Class I.

As one of the six main drainage systems in Tianjin, the Xianyang Road facility serves an area of 6,806 hectares, and the upgrade will be one of the key sewage treatment projects for pollution control of the Hai River.

The project was awarded to Siemens following a successful BNR pilot study carried out earlier this year, and is scheduled to start in April 2010.

The BNR system uses an aerated anoxic reactor in which simultaneous nitrification and de-nitrification occurs, followed by two aerobic reactors to increase the efficiency of total nitrogen removal when compared to conventional processes. With the BNR process, the biological reaction tank footprint is minimised, and thus the capital cost is significantly reduced.

Siemens said TCEPC will not need the additional basins that would otherwise be required for conventional activated processes. It added that not only can the BNR be easily retrofitted into existing plants, but is also ideal for new plants.

Water treatment technologies and solutions are an important feature of Siemens' environmental portfolio. In 2008, Siemens' revenue from the products and solutions in its environmental portfolio was nearly 19B Euros. In 2008, Siemens China announced that more than half of its 1B Euro mid-term investment will go to energy-saving and environmentally friendly technologies and solutions.

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