Sunday, August 16, 2009

Water conservation

China Daily


China is adapting new strategies to conserve water. The same technique can be exported to other cities in developed countries, including Los Angeles, San Diego, and other coastal cities with limited fresh water resources.


China is turning to the sea to solve the growing problem of water shortages afflicting the country and cut utility costs, too.

A pilot project that uses seawater to flush toilets in a residential part of the famous brewery city of Qingdao in Shandong province will be extended after receiving official approval in June.

Another section of the coastal city is experimenting with using seawater in an air conditioning system for apartments, at public gyms and in swimming pools.

Now calls are being made to increase the number and size of desalination plants that treat seawater to provide for more of the country's needs for fresh water.

Residents of the Haizhiyun neighborhood of Qingdao were the first on the mainland to have their homes fitted with a system that uses seawater to flush toilets.

One of the residents, Li Tong, 62, said he was delighted with the result, which he found more hygienic and economical.

"The salt water is so good," he said. "What's more important, our monthly expenditure for water usage has been cut by a quarter."

Like 400 of China's 600-plus cities, Qingdao suffers from acute shortages of water. One-third of household consumption of water is used to flush toilets.

The 800 residents in the pilot project only pay 0.7 yuan per ton for processed seawater, which is about one-third of the average price of tap water in the city.

If 50 percent of Haizhiyun residents - about 1,000 households - used seawater, they would save 378 tons of fresh water and save $110 in water charges every day.

"We are so proud to introduce this eco-friendly project into our community," said Xiao Shengyan, deputy general manager of Qingdao Longhai Group Co Ltd, the developer of Haizhiyun.

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