Zero Waste Discharge for Paper Plants

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Zero Waste Discharge for Paper Plants

Chinese researchers help paper plant realise zero waste discharge

Xu Nanping of the Chinese Academy of Engineering, told Xinhua that treatment film filtering technology has turned the 32,000-tonnes of waste water discharged by Jiangsu Oji Paper Co., Ltd each day into clean water, industrial salt and driedmud.

It took Xu and his team from Nanjing Technological University nine months to design the equipment. Xu is also deputy governor of east China's Jiangsu Province and head of the provincial department of science andtechnology.

The project is managed by a local water treatment firm and has been running successfully since January2014.

"Zero discharge of pulping waste water is unprecedented," said Oshima Tadashi, deputy general manager of Jiangsu Oji, a Japanese company with an investment of nearly two billion U.S.dollars.

Paper plants are major polluters worldwide and it is common practice to discharge waste into rivers or the sea after treatment. The Oji plant once planned to discharge wastewater into the Yellow Sea via a pipeline but the project was canceled due to protests by people living along thecoast.

The recycling project cost half as much as the pipeline was expected to and its operation costs are 30 per centlower.

Currently, Oji Paper buys back 12,000 tonnes of reclaimed water from the treatment company every day. The recycled water is also bought by other companies. The quality of the water is better than that taken directly from the Yangtze or even tap water in terms of major quality indices, said Wang Chaohui, director of the area's environmental protectionbureau.

Source: Eco-Business

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