 |
What is the pulping wastewater from the paper industry? The current practice in the world is to treat rivers and rivers after reaching the standard water. Now there is an exception - in the Nantong Economic and Technological Development Zone in Jiangsu Province, the papermaking pulping wastewater is not discharged into the water body, but is recycled in the form of "reclaimed water reuse". The industry believes that this move has great significance for energy conservation, emission reduction and protection of the ecological environment.
Xu Nanping, deputy governor of Jiangsu Province, academician of the Chinese Academy of Engineering, and chief scientist of the Chinese Membrane Science Project 973, told Xinhua News Agency reporters that since January 2014, the 22,000-ton-a-day production system of Jiangsu Oji Paper Co., Ltd. located in Nantong Development Zone Pulp waste water, all of which flow into and adjacent to it, is built for it, has a "reclaimed water reuse" device, Nada Water Company, through pre-processing, membrane filtration, evaporation and crystallization process, into a recyclable water Industrial salt and dried mud.
They are now deciding to announce this major technological innovation to the public and will promote it in all enterprises that need to deal with sewage.
Jiangsu Oji Paper Co., Ltd., with a total investment of 1.98 billion U.S. dollars, is by far the largest Japanese investment company in China.
The company's deputy general manager, Oshima Tajiki told reporters that they have achieved zero discharge of pulping wastewater, which is unprecedented in the world. As the world's third largest and Asia's largest papermaking company, even in Japan, Prince's pulping wastewater is discharged to the sea or river after reaching the standard, and it is also true in other developed countries.
Xu Nanping said that until now, the discharge of papermaking pulping wastewater to the water after it has been treated is still legal in China. The Jiangsu Prince company originally planned to construct a pipeline from Nantong, passing Qidong city in the southeast direction, and drain the wastewater to the Yellow Sea. The reason why this was not done was because some people in Qidong worried that the move would affect the ecological environment and offshore fisheries. A protest broke out on July 28, 2012, and the drainage pipeline project was cancelled.
If pulping wastewater cannot be processed, the entire project cannot be put into production. At a critical moment, Academician Xu Nanping took the initiative and requested to resolve the worldwide problem of recycling all the pulp and paper pulping wastewater with the “reclaimed water reuse†method.
He led more than 40 R&D personnel at the Institute of Membrane Science at Nanjing University of Technology to work day and night to solve the problems that global peers such as blocked filter membranes and hard-to-crystallize salt are unable to solve. They completed the process design in 3 months, completed equipment manufacturing and installation in 6 months, and achieved trial operation within one year. Compared with the drainage pipeline project, the funds for the construction of the reclaimed water reuse project are saved by half, and the operating cost is 30% lower.
In the ultrafiltration system operation area of ​​Nanda Water Co., Ltd., Qiang Qiang, the director of the management committee of Nantong Economic and Technological Development Zone, took the treated Zhongshui by hand and drank two big mouths. "This water has been equated with pure water and is not harmful to the human body. It is not a problem to quench the thirst," reluctantly told reporters.
Wang Chaohui, head of the Development Bureau’s Environmental Protection Bureau, told the reporter that the monitoring data showed that the quality of the treated water produced by the Prince's pulping wastewater was good, and the main water quality indicators such as COD, turbidity, hardness, and pH were better than those of the Yangtze River or even tap water.
“Over the past year or so, there have been no problems with operations,†said Oda Tadao, “The water reuse project has deepened the trust relationship between us and Nantong.†Prince also repurchased 12,000 tons of water from the Nanda Water Company every day. Zhongshui is used for the production of paper with higher water quality requirements. The reporter saw in the Prince company that the “reclaimed water†flowing back from the Nengda Company was very clear and entered the production cycle again.
“Reclaimed Water Reuse Project has great value in science and technology promotion, especially in the Yangtze River Valley and water shortage areas.†Xu Nanping said that the use of membrane integration technology to achieve zero discharge of pulping wastewater has been successfully practiced, allowing them to confidently resolve almost All industrial wastewater treatment issues.
As long as the scientific analysis of the components of related industrial waste water and the targeted integration of relevant membrane materials can achieve all the water reuse, ie, zero emissions. If local governments can make up their minds to promote, this technology will play an invaluable role in the protection of water resources and water environment in China and the world.
China Portable Electric Stove,Electric Stove,Electronic Hob Manufacturer and Supplier
This kind of goods material ,we use best quality stainless steel and we offer good price to the cusotmers from all over the world .
Portable ELECTRIC STOVE ,Electric Stove,Electronic Hob,Electric Stove Cooker
it is very ealy to clear and tidy it ,it also had the safe device
We are manufacturer of Portable Electric Stove in China, if you want to buy Electric Stove,Electronic Hob,Electric Stove Cooker please contact us.
ELECTRIC STOVE
Portable Electric Stove,Electric Stove,Electronic Hob,Electric Stove Cooker
GUANGZHOU AIJINGSI TRADING LIMITED , https://www.aichugashob.com