During the processing of plant oil, a large amount of wastewater is generated. This wastewater contains pollutants such as oil, proteins, carbohydrates, suspended solids, making it difficult to treat due to its complex water quality. The emulsified oil in the wastewater is one of the difficulties in wastewater treatment, and the emergence of demulsifiers for plant oil wastewater provides an effective solution to this problem.
Plant oil wastewater has the following characteristics:
1. High organic matter concentration: In addition to oil, the wastewater also contains a large amount of organic matter such as proteins, carbohydrates, leading to high chemical oxygen demand (COD) and biochemical oxygen demand (BOD) values.
2. High suspended solids content: The wastewater contains a large amount of solid suspended solids, such as meal residue, sediment, etc., increasing the difficulty of treatment.
3. Large water quality fluctuations: During the plant oil processing process, factors such as the type of raw materials and processing techniques can cause fluctuations in wastewater quality, posing a challenge to the treatment process.
These characteristics make the treatment of plant oil wastewater a challenge, especially the removal of emulsified oil. Emulsified oil forms stable emulsions in wastewater, making it difficult to effectively separate them using conventional physical methods (such as oil-water separation, air flotation), and chemical methods (such as acidification, alkalinization) may further deteriorate the water quality of the wastewater. Demulsifiers for plant oil wastewater are specifically designed to handle emulsified oil. The principle of action is to coagulate the oil droplets and other pollutants dispersed in the wastewater into larger particles, improving the treatment efficiency of the wastewater and facilitating subsequent precipitation and filtration.
Compared to traditional wastewater treatment methods, demulsifiers for plant oil wastewater have the following advantages:
The application method of demulsifiers for plant oil wastewater mainly includes the following steps:1. High efficiency: It can quickly break the emulsion, separating the emulsified oil from the wastewater, improving the efficiency of oil-water separation.
2. Strong adaptability: It has good adaptability to different types of plant oil wastewater and can address issues such as water quality fluctuations.
3. Easy operation: The method of use is simple, just add the demulsifier to the wastewater, stir evenly, without the need for complex equipment and operational processes.
4. Environmental friendliness: The demulsifier itself is non-toxic and harmless, does not cause secondary pollution to the environment, and can reduce the use of chemical agents in wastewater treatment, minimizing the impact on the environment.
1. Experimental selection: Before actual application, small-scale experiments are required to determine the best type and dosage of demulsifier. Different types of demulsifiers are added to the wastewater to observe the demulsification effect, selecting the most effective demulsifier and determining the optimal dosage.
2. Wastewater treatment: The prepared demulsifier solution is added to the plant oil wastewater, stirred evenly to mix the demulsifier with the wastewater. After a certain reaction time, observe the demulsification effect, such as oil-water separation and the sedimentation of suspended solids.
3. Subsequent treatment: After demulsification treatment, the wastewater can undergo further treatment such as precipitation, filtration, and biological treatment to further reduce the pollutant concentration and meet discharge standards.
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