Sewage system set to go green in Shanghai

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An eco-friendly sewage system is to be built on Chongming Island, ensuring virtually no waste water is discharged into wetlands that provide a vital habitat for birds.

Work is scheduled to begin early next year in an area of 12.5 square kilometers around Dongtan Wetland on the island.

This will be the first time Shanghai has constructed a large-scale green drainage network, Dai Dongchao, an official with the Shanghai Urban Construction Design Institute, said yesterday.

Lessons learned from the trial will be applied to future initiatives to build similar systems elsewhere in town.

The design was approved for construction by a local government-authorized expert panel earlier this month, Dai told Shanghai Daily.

Under the new system, all waste water produced by households and businesses around the wetland area will be collected and processed for reuse.

Treated water will be used for public sanitation - such as flushing toilets, planting projects and other tasks.

"It will be the first urban practice in Shanghai to make systematic use of processed waste water to support life and production," Dai said.

"Almost no waste water will be discharged into the environment around the wetland once the project is complete."

The drainage network will also include rain collecting facilities so that rainfall can be gathered and used in plant growing and to fill ornamental pools.

This will help cut back on tap water use.

Future residential areas to be completed around the wetland will be told to adopt the same drainage facilities.

Dongtan wetland, on the east end of the Chongming Island includes Dongtan Nature Reserve which provides a habitat for many species, including migrating birds.

The local government is aiming to make the island an eco-friendly area featuring a leisure industry alongside a well-protected natural environment.

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