[photopress:zones_Wuhan_economic_dev_zone.jpg,full,alignright]Wuhan Economic-Technological Development Zone has installed  a wastewater treatment plant that  appears to be both efficient and energy saving.

Wuhan is one of China’s largest cities (population over seven million) and the capital of Hubei Province. Because Wuhan is located where the Yangtze River and the Han River join, the treatment of municipal and industrial wastewater is of great importance.

The wastewater treatment plant of Wuhan Economic-Technological Development Zone is located in a fast-developing area of the city.

Before the new plant was put into operation, Wuhan’s wastewater treatment percentage totaled only 21%, far from the state requirement of 60% for 2005. All untreated domestic wastewater was discharged directly into the local Taizi Lake.

In the zone the daily wastewater discharge amounted to as much as 40,000 tons.

The water quality of the local Taizi Lake deteriorated to Grade V lower than which you cannot get.

The answer was a plant built by Sanitaire using diffusers with a higher oxygen transfer efficiency and a lower system pressure head loss which together made the cost of the overall aeration system operation  relatively low.

This is but one example of the efforts being made across China to bring the development zones into line with the standard of 60% treatment.
Source: Water Online

[photopress:zones_jiangsu.jpg,full,alignright]Singapore conglomerate Sembcorp Industries has entered an RMB112 million($16 million) joint venture to build and run an industrial water recycling facility in China’s Jiangsu Province. Sembcorp will take an 80% stake in the joint venture company, which is called Zhangjiagang Free Trade Zone Sembcorp Water Recycling, while the remainder will be held by Zhangbao Industries, an investment arm of the Zhangjiagang city government.

The facility, to be completed in the first half of next year, will be Sembcorp’s third water management project in Zhangjiagang.

It will supply recycled water, including demineralised water, to industries in the Zhangjiagang Free Trade Zone.

(The Zone is under the jurisdiction of Suzhou and is a two hour drive to Shanghai. It was approved by the State Council in 1992 and is the only Chinese free trade zone that lies on an inland river.)

SembCorp said it expects to fund the joint venture through a mixture of equity and a commercial loan.
Source: Reuters