He explained, "We call it a concept plant as we are still in the first phase of its design, and we will release details of where it will be sited and the construction funds behind it at the end of this year."

On Wednesday, Chinese Premier Li Keqiang delivered his first government work report at the opening meeting of the national legislature's annual session, showing his concern over increasing pollution in air, water and soil.

He announced that an action plan on clean water will come out this year to reinforce protection of drinking water sources and treatment of polluted water.

In February, the Ministry of Environmental Protection proposed an investment of two trillion yuan (325.9 billion U.S. dollars) to prevent and treat water pollution, higher than the air pollution treatment funds of 1.7 trillion yuan.

Environmentalist Yang Bin believes the concept plant is technically feasible.

As the population continues growing, China will finally step on the path to properly recycle waste water, Yang predicted.