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Pesticide wastewater refers to the wastewater discharged by pesticide factories during the pesticide production process. The quality and quantity of wastewater are unstable. It is mainly classified into: benzene-containing wastewater, organophosphorus-containing wastewater, high-concentration saline wastewater, high-concentration phenol-containing wastewater, and mercury-containing wastewater. If emissions do not meet the standards, it will cause significant pollution to the environment. Centrifugal extractors are highly effective in treating phenolic compounds in pesticide-contaminated wastewater. The significance of treating pesticide-contaminated wastewater: The purpose of treating pesticide wastewater is to reduce the concentration of pollutants in wastewater generated during pesticide production, improve the rate of recovery, and strive to render it harmless. Methods for treating pesticide wastewater include activated carbon adsorption, wet oxidation, solvent extraction, distillation, and activated sludge processes. However, developing new pesticides that are efficient, low in toxicity, and have low residues is the direction of development for pesticides. Some countries have banned the production of organic chlorine and organic mercury pesticides such as BHC, and are actively researching and using microbial pesticides; this represents a new approach to preventing pesticide wastewater from contaminating the environment at its source. The main characteristics of pesticide wastewater are as follows: 1. The concentration of pollutants is high, with COD (Chemical Oxygen Demand) reaching tens of thousands of milligrams per liter ； 2. It is highly toxic; in addition to pesticides and intermediates, wastewater also contains toxic substances such as phenols, arsenic, mercury, as well as many substances that are difficult for organisms to degrade ； 3. It has a foul smell and is irritating to the human respiratory tract and mucous membranes ； 4. The water quality and quantity are unstable. Therefore, pesticide wastewater causes severe environmental pollution. Treatment methods for pesticide wastewater: When dealing with actual wastewater, since organic pollutants in water exhibit complex and diverse characteristics, relying on a single treatment process often fails to achieve the desired results. When dealing with actual wastewater, an appropriate combination of treatment processes can be selected by taking into account both the technical characteristics and the specific quality of the wastewater. For the biological treatment of pesticide wastewater in China, most pesticide manufacturers have installed biochemical treatment systems, but at present almost none of them are able to achieve satisfactory treatment results. Therefore, research on the biochemical treatment of such wastewater is highly necessary. Numerous studies have shown that microorganisms such as fungi, bacteria, and algae have a strong ability to degrade pesticides. The electrolytic treatment of pesticide wastewater can effectively remove pollutants and improve the biodegradability of the wastewater. The newly formed iron surface, along with the large amount of primary Fe2+ ions and atomic hydrogen generated during the reaction, possess high chemical reactivity. They are capable of altering the structure and properties of many organic substances in wastewater, causing these substances to break down and lose their ring structures. The electric field effects around the microbattery electrodes also facilitate the aggregation and deposition on the electrodes of charged ions and colloids, thereby removing them from the solution. Additionally, the Fe2+, Fe3+ ions and their hydrates produced as a result of the reaction have strong adsorption and flocculation properties, which further enhance the efficiency of wastewater treatment. The treatment of pesticide wastewater using centrifugal extractors involves the use of water-insoluble extractants that come into contact with the phenolic compounds present in the pesticide wastewater, enabling physical or chemical binding between these phenolics and the extractants and thus facilitating their phase transfer. However, during the solvent extraction process, the two phases exhibit a certain degree of mutual solubility, which can lead to solvent loss and secondary pollution; moreover, solvent regeneration has a significant impact on the economic efficiency and reliability of the process. The advantages include low equipment investment, easy operation, and low energy consumption; it can also effectively recover phenolic substances from wastewater, making it suitable for high-concentration phenol-containing wastewater