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Supercriticalwateroxidationtechnologyforthetreatmentoforganicphosphoruspesticidewastewater

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Registration number:G20250239

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Key words: Organophosphorus pesticides pesticide wastewater treatment

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Publisher:管理人员

Release time:2025-08-09 08:49:04.0

  • Essential information
Name of achievement: Supercriticalwateroxidationtechnologyforthetreatmentoforganicphosphoruspesticidewastewater
Result registration number: G20250239 Subject classification:
Green classification: Item keywords: Organophosphorus pesticides   pesticide wastewater treatment      
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Xi'an Jiaotong University

The stage of achievement:
Mode of cooperation: Overalltransfer,technologylicensing Outcome Information:
Countries/regions: China Intellectual property rights: Invention patent, others
Introduction: Click to view
I. Project Background In 2005, China's total pesticide production exceeded one million tons, ranking first in the world, and reached 3.549 million tons in 2012. Organophosphorus pesticides account for 70% of China's total pesticide production, and their wastewater has the characteristics of high concentration, high toxicity, high salt content, difficulty in biodegradation, and complex composition. Among the national treatment of pesticide wastewater, only 7% of the wastewater has been treated, and the treatment compliance rate is less than 1%. In response to the current low treatment rate of pesticide wastewater and the huge market, supercritical water oxidation technology is used to treat organophosphorus pesticide wastewater, achieving harmless treatment of the wastewater. Supercritical Water Oxidation (SCWO) technology utilizes the special properties of water in a supercritical state. The oxidation agent and organic matter are completely dissolved in supercritical water, where a homogeneous oxidation reaction occurs, rapidly and thoroughly converting the organic matter into harmless small molecule compounds such as CO2, N2, and H2O. Supercritical water oxidation can effectively treat wastewater from organophosphorus pesticides. Given the advantages of supercritical water oxidation technology in the treatment of organic pollutants, it can be used for the efficient and harmless treatment of wastewater from organophosphorus pesticides. There is no secondary pollution, and the characteristics of supercritical water can be utilized to separate and recover mineral resources such as phosphates, and to recycle the system's heat. Compared to traditional treatment schemes, SCWO has outstanding advantages and can achieve significant economic, environmental, and social benefits. Second, technological innovation and leadership: As shown in Figure 1, using SCWO to treat wastewater from organophosphorus pesticides, the quality of the treated wastewater changes with the treatment conditions, and the final treatment result can fully meet discharge standards. Our research group has been studying SCWO for many years, with more than 20 projects including National Natural Science Foundation of China grants, "973 Plan" topics, "863 Plan" special subjects, and National Science and Technology Support Program projects. The results have been fruitful, with 38 national invention patents granted. During the process of conducting research on supercritical water treatment, more than 50 related research papers have been published, including over 30 that were indexed by SCI/EI. Currently, our research group has completed the design of a 100t/d pesticide wastewater treatment system, with equipment processing and installation basically finished. This system integrates multiple functions such as organic matter removal, salt deposition prevention and control, waste heat utilization, efficient oxygen utilization, and high automation. It can simultaneously achieve the harmless treatment and resource utilization of organic phosphorus wastewater and other organic wastes/wastewater. This technology can realize an integrated process for reducing chemical oxygen demand (COD) in pesticide wastewater and desalination treatment. Efficient oxygen utilization technology, high oxidation coefficient, low oxygen consumption; Desalination treatment and sludge separation are achieved in the device to effectively prevent salt deposition and blockage; Carbon dioxide generated by resource recovery system; Efficient anti-corrosion technology, which increases the service life of the system; Highly automated control and multiple safety guarantees. III. Market and Benefit Analysis: SCWO equipment can be used efficiently and economically for the harmless treatment and resource utilization of wastewater from organophosphorus pesticides, with the treated water meeting relevant discharge standards after final discharge. For wastewater with high organic content, the excess heat generated after complete oxidation is not only sufficient for self-heating but can also be used to provide hot water or generate steam, and the CO2 gas produced during the reaction can also be separated and sold for further economic benefits. This has a bright development prospect in the context of increasingly severe environmental pollution and growing energy shortages. Taking the completed design scheme for 100t/d pesticide wastewater as an example, the comparison with the original plan is shown in Table 1 below. It can be seen from the table that using SCWO to treat pesticide wastewater has significant advantages in terms of investment cost, operating cost, land occupation, and treatment time. Currently, the annual production volume of organophosphorus pesticide wastewater is calculated at 90 million tons, with an estimated 80 million tons not meeting standards, accounting for a market share of 25% in SCWO. The total amount of wastewater to be treated is 20 million tons per year, with equipment treatment capacity set at 100t/d, requiring a total of 550 sets. The selling price is 45 million yuan per set, the profit is 17 million yuan per set, and the total sales revenue is 9.35 billion yuan. However, the entire pesticide wastewater treatment market is even larger. IV. Main Application Fields The SCWO technology for organophosphorus pesticide wastewater is in line with national industrial and technological policies, has strong innovativeness, The product has high added value and strong market competitiveness. According to the huge production volume and growth trend of pesticide wastewater in China at present, there is a large potential user base for supercritical water oxidation equipment for pesticide wastewater, and the market prospect is broad. V. Cooperation Conditions (1) Natural persons with the capacity to independently bear civil liability or corporate legal entities that can independently assume civil responsibility. (2) Industrial demonstration and operation are carried out through a combination of industry, academia, and research, and the cooperating enterprise needs to provide financial and operational support. (3) Possess certain investment capabilities and risk awareness, as well as the ability to market and expand products.
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