HC Water Industry Network News, July 28, 2012, the early morning of Nantong Qidong was very calm on this day. As a large amount of sewage needs to be discharged from the paper mill set up by Oji Paper in Nantong, in accordance with international practice, Nantong plans to build a 110-kilometer sewage pipe for the "Nantong Sea-to-Sea Project". The citizens of Qidong foresaw that the beautiful homes of the past might be damaged, and they took to the streets to resist the discharge of toxic waste water from the Prince's Paper Mill to the waters near Qidong and called for the operation of "defending their homes". On the one hand, there is strong resistance from the people, and on the other hand, the pressure from the Japanese government. At this time, stopping the "Nantong Sea Relief Project" is not just stopping a project. It is also Japan's trust in Chinese technology. Economically and diplomatically, the Nantong government is in a dilemma.
In this situation, it seems that it is difficult to satisfy everyone in all aspects. Based on this, HC Network specially interviewed Dr. Zhang Chun, general manager of Jiuwu Hi-Tech Water Division, who was the implementer of the project at that time.
HC Network : Dr. Zhang Chun, how difficult was this situation at the time?
Zhang Chun : Due to the Nantong government ’s commitment to “permanently suspend construction” for the people, the unfinished sea drainage pipeline has become a “dead chess”: First, it denies sea drainage, and Japan ’s largest investment project in China, Oji Paper Pulp Pulp With nowhere to discharge, Nantong is facing compensation for breach of contract that may exceed 10 billion yuan. Apart from the economic impact, the most worrying thing is probably the negative diplomatic reaction. Second, the zero-emission technology is a negative voice. There is no precedent in the world for "zero discharge" of wastewater in this area. Some experts have also demonstrated that to achieve zero discharge, the initial investment alone will require nearly 3 billion yuan, more than double the 1.2 billion yuan required for the construction of offshore pipelines. Local finance will face a lot of pressure. Therefore, many people in the industry thought that "zero discharge of pulp tail water is impossible."
At this critical moment, the Institute of Membrane Science and Technology of Nanjing University of Technology actively requested and cooperated with Jiangsu Jiuwu High-tech Co., Ltd. to take over the worldwide technical problem of "zero discharge" of papermaking pulp wastewater. Next, they are waiting for a series of problems such as turning pulping wastewater into recyclable reclaimed water, industrial salt, dry mud, and achieving full recycling of wastewater.
HC.com interviewed Dr. Zhang Huiqin of the Jiuwu Hi-Tech Water Division, who participated in the research and development of this project, and let us know about the mindset of the scientific researchers who participated in the project at that time.
HC Network : Could you please briefly introduce what technical difficulties we encountered in the project of zero discharge of Nantong Prince Papermaking Wastewater?
Dr. Zhang Huiqin : The biggest difficulty of this project was that there were no successful cases at home and abroad for reference at that time. We accumulated a large amount of experimental data from scratch and gradually explored it. Work hard to overcome this problem.
HC Network : With such a large workload, what are some things that you find more memorable?
Dr. Zhang Huiqin : In a word, scientific success depends on continuous accumulation and verification and an extraordinary team spirit. In this project, we have carried out a large number of groundbreaking experimental work without a case to draw on, and mainly carried out process comparison and selection in multiple stages such as pretreatment, membrane concentration and evaporation crystallization. On the one hand, we organized small-scale trials at the South China University of Technology Membrane Institute to investigate the performance of the membrane and pretreatment system; on the other hand, we also carried out pilot studies on pulp enterprises with similar processes in Jiangsu, Anhui, and other places. The school has invested dozens of individuals in research and development at the same time. I also personally participated in the project's pilot, pilot, and project technical transformation research. Pilot studies have verified the feasibility and reliability of pretreatment processes and membrane concentration processes, and accumulated a large amount of pilot data. One experimenter became a "mechanical keyboard player" after long-time input of data. The performance was that his hands trembled while eating. We would all jokingly ask him if his chopsticks could hold the dishes. It can be seen that the amount of data was large at that time.
Although the difficulty is so great, the task is so difficult. However, the team of Nanjing University of Technology and Jiuwu Hi-Tech University did not forget their original intentions and continued to innovate. In response to the demand for industrial wastewater reduction, they put forward a research idea of "drying up the pulping wastewater" and invented efficient pretreatment, multi-film integration technology, A new process of zero discharge of membrane pulping wastewater combined with evaporation and crystallization, developed advanced technologies such as softening of effluent quality and collaborative control of membrane pollution, implemented the world ’s first zero discharge project of membrane pulping wastewater, and solved In response to the international problem of zero-discharge treatment of pulping wastewater, the industrial wastewater was converted into purified water and used as resources. It was selected into the National "Twelfth Five-Year" Scientific and Technological Innovation Achievement Award and became a model for solving social development problems with science and technology. The follow-up research team further promoted and applied the related results in the waste water recycling of pulp and paper, fine chemical industry, salt chemical industry, and pharmaceutical industry. The cumulative reduction of waste water by 130 million tons and more than 7,000 tons of COD resulted in significant environmental benefits. It has achieved very good economic and social benefits, and made important contributions to the high-quality economic and social development.
On January 10, 2020, the 2019 National Science and Technology Awards Conference was grandly held in the Great Hall of the People in Beijing. Jiangsu Jiuwu High-Tech Co., Ltd., in cooperation with Nanjing University of Technology and other technologies, has won the "National Science and Technology Progress Second Prize" for the scientific and technological achievements of "Membrane Preparation, Integrated Technology and Application for Zero Discharge of Pulp Wastewater."
The following is an interview with HC Network on Dang Jianbing, Chairman of Jiuwu Hi-Tech.
HC Network : Jiuwu Hi-Tech ’s “Membrane Preparation, Integrated Technology and Application for Zero Emission of Pulp Wastewater” scientific and technological achievements won the honor of “National Second Prize of Scientific and Technological Progress”. What are the profound effects of technological innovation on Jiuwu?
Chairman of Dang Jianbing : One of the corporate values of Jiuwu Hi-Tech is "innovation is the primary productive force", and Jiuwu has the ability to "inherit and innovate". From the beginning of his establishment, under the leadership of Academician Xu Nanping, Jiuwu has always adhered to innovation and leadership, not only working hard to adhere to the development of membrane materials such as ceramic membranes, but also to the application research of membrane materials. In many fields, Jiuwu has established many first sets of innovative membrane applications. Jiuwu also pays great attention to the inheritance and development of this innovative gene. At present, Jiuwu's R & D personnel are basically master's degree or above. We are also in the forefront of listed and high-tech companies in terms of R & D investment intensity. Therefore, Jiuwu always adheres to the inheritance of the construction and development of innovative genes. On a small level, the use of innovation can help Jiu to increase productivity, thereby producing products that are more in line with market demand and development. On the large level, these innovative technologies can help customers The entire industry in which it is located enhances its own productivity, promotes Made in China, and Made in China! .
Jiuwu Hi-Tech is the first batch of high-tech enterprises recognized in Jiangsu Province, as well as the national torch plan high-tech enterprises. As an advanced enterprise in China's emerging inorganic membrane industry, it currently has national and local joint engineering research centers, provincial enterprise technology centers, etc. The platform and the related five industry standards were drafted by the company. The company has won a number of national, provincial and ministerial awards. The company has played a leading role in technology and industry in the inorganic film industry in China. The main driving force for upgrading the industrial structure of the industry and promoting the optimization of the company's product structure. This award is a landmark achievement of Jiuwu Hi-Tech's focus on scientific and technological progress for many years.
In the future, Jiuwu Hi-Tech said that it will further leverage the company's technological advantages and leading role in the membrane industry, promote enterprise product technology innovation, optimization and upgrading, improve the technological level and development status of China's membrane industry, accelerate the transformation of scientific and technological achievements, and form an industry transformation and upgrade Strong support for development, to better meet the needs of traditional industries in technological transformation and other fields, and make further contributions to accelerating the development of national strategic emerging industries!