The organic pollutants emitted by the chemical industry are one of the major sources of organic poisons in China's water environment. This type of wastewater is treated by a single destruction method, which is costly and wastes resources. The integrated processing technology centered on resource-based technologies is highly recommended due to the concept of circular economy. The 2007 National Technological Invention Award second prize project “New technologies for the treatment and recycling of water-soluble and difficult-to-degrade organic pollutants†is a typical representative of resource technology. Its successful development and promotion provided cleanliness for China's organic chemical industry. Production demonstration.
At present, this technology has been successfully applied to eight companies including Jiangsu Yangnong Chemical Group Co., Ltd., and 12 sets of industrial wastewater treatment plants have been built and put into operation; COD caused by reduction of toxic organic matter is about 10,000 tons/year, and chemical products recovered are about 4 Ten thousand tons/year, cumulative new taxation and savings of approximately 110 million yuan in the past three years.
This project, led by Academician Zhang Quanxing of the School of Environment of Nanjing University, systematically studied the mechanism of adsorption of organic pollutants by resin adsorbents, and developed new series of resins through resin skeleton optimization, pore structure control, and surface chemical modification. Adsorbents; Based on new resin adsorbents, we have successfully developed a number of patented technologies for the treatment and recycling of water-soluble and refractory organic pollutants. After the promotion and application of this result, it has produced significant environmental and economic benefits. It has made important contributions to the realization of resource-saving and environment-friendly society for the control of organic poison pollution and ecological security.
According to reports, the adsorption method is one of the effective methods for the treatment and recycling of organic pollutants. The project team of Academician Zhang Quanxing has been dedicated to the treatment and recycling of chemical waste water since the 1980s. He has independently developed high-specific surface super-high cross-linked adsorptive resins and has been successfully applied to phenols or aromatic carboxylic acids with low water solubility. Acids and other pollutants in the treatment of chemical wastewater. They opened up new areas for the treatment of toxic organic chemical waste water by the resin adsorption process and attracted widespread attention from the chemical and environmental industries. They won the second prize of the 2001 National Science and Technology Progress Award.
However, the organic chemical industry such as pesticides, dyes, and pharmaceuticals in China emits a wide range of industrial wastewater and has complex components. Most of the organic pollutants in wastewater are water-soluble organics. Based on the single hydrophobic interaction of macroporous and ultra-high cross-linked adsorptive resins and other adsorbents such as activated carbon, the adsorption capacity of these pollutants is low, and their adsorption selectivity is poor, so effective treatment and resource utilization cannot be achieved. At the same time, although this method has high adsorption capacity for volatile aromatic organic pollutants, ultra-high cross-linked adsorptive resins and other adsorbents, it is necessary to use organic solvents for regeneration, equipment investment, and treatment when steam is used to blow off the easily collapsed pores. high cost.
Academician Zhang Quanxing has conducted further research on these problems. They self-designed and prepared composite functional adsorption resins and heat-resistant adsorption resins that have hydrophobic and hydrogen-bonding (or electrostatic) effects on water-soluble organic pollutants, and invented organic pollutant treatment and resources centered on novel resin adsorption technologies. The integrated process solves technical problems such as low adsorption capacity of water-soluble organic pollutants, poor adsorption selectivity, and easy collapse of holes when steam is blown off and recycled, and achieves water-soluble and hardly degradable organic pollution. Material governance and resource utilization.
The main innovation of this achievement is the invention of a method for the selective separation and recovery of water-soluble organic pollutants in high-salt chemical wastewater systems, and the development of high-concentration, high-salt, refractory organic wastewater treatment with resin adsorption technology as the core. Integrating with resource integration technology solves the technical problem that this type of wastewater can not be treated economically and effectively for a long time; invented the separation and recovery of volatile and difficult-to-decompose aromatic hydrocarbon pollutants and the use of water vapor in highly acidic (alkaline) aqueous solutions. With the method of regenerating resin, the clean production of the chlorobenzene industry was realized.
At present, this technology has been successfully applied to eight companies including Jiangsu Yangnong Chemical Group Co., Ltd., and 12 sets of industrial wastewater treatment plants have been built and put into operation; COD caused by reduction of toxic organic matter is about 10,000 tons/year, and chemical products recovered are about 4 Ten thousand tons/year, cumulative new taxation and savings of approximately 110 million yuan in the past three years.
This project, led by Academician Zhang Quanxing of the School of Environment of Nanjing University, systematically studied the mechanism of adsorption of organic pollutants by resin adsorbents, and developed new series of resins through resin skeleton optimization, pore structure control, and surface chemical modification. Adsorbents; Based on new resin adsorbents, we have successfully developed a number of patented technologies for the treatment and recycling of water-soluble and refractory organic pollutants. After the promotion and application of this result, it has produced significant environmental and economic benefits. It has made important contributions to the realization of resource-saving and environment-friendly society for the control of organic poison pollution and ecological security.
According to reports, the adsorption method is one of the effective methods for the treatment and recycling of organic pollutants. The project team of Academician Zhang Quanxing has been dedicated to the treatment and recycling of chemical waste water since the 1980s. He has independently developed high-specific surface super-high cross-linked adsorptive resins and has been successfully applied to phenols or aromatic carboxylic acids with low water solubility. Acids and other pollutants in the treatment of chemical wastewater. They opened up new areas for the treatment of toxic organic chemical waste water by the resin adsorption process and attracted widespread attention from the chemical and environmental industries. They won the second prize of the 2001 National Science and Technology Progress Award.
However, the organic chemical industry such as pesticides, dyes, and pharmaceuticals in China emits a wide range of industrial wastewater and has complex components. Most of the organic pollutants in wastewater are water-soluble organics. Based on the single hydrophobic interaction of macroporous and ultra-high cross-linked adsorptive resins and other adsorbents such as activated carbon, the adsorption capacity of these pollutants is low, and their adsorption selectivity is poor, so effective treatment and resource utilization cannot be achieved. At the same time, although this method has high adsorption capacity for volatile aromatic organic pollutants, ultra-high cross-linked adsorptive resins and other adsorbents, it is necessary to use organic solvents for regeneration, equipment investment, and treatment when steam is used to blow off the easily collapsed pores. high cost.
Academician Zhang Quanxing has conducted further research on these problems. They self-designed and prepared composite functional adsorption resins and heat-resistant adsorption resins that have hydrophobic and hydrogen-bonding (or electrostatic) effects on water-soluble organic pollutants, and invented organic pollutant treatment and resources centered on novel resin adsorption technologies. The integrated process solves technical problems such as low adsorption capacity of water-soluble organic pollutants, poor adsorption selectivity, and easy collapse of holes when steam is blown off and recycled, and achieves water-soluble and hardly degradable organic pollution. Material governance and resource utilization.
The main innovation of this achievement is the invention of a method for the selective separation and recovery of water-soluble organic pollutants in high-salt chemical wastewater systems, and the development of high-concentration, high-salt, refractory organic wastewater treatment with resin adsorption technology as the core. Integrating with resource integration technology solves the technical problem that this type of wastewater can not be treated economically and effectively for a long time; invented the separation and recovery of volatile and difficult-to-decompose aromatic hydrocarbon pollutants and the use of water vapor in highly acidic (alkaline) aqueous solutions. With the method of regenerating resin, the clean production of the chlorobenzene industry was realized.
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