Cutting fluid wastewater is a common industrial wastewater, which mainly comes from the cutting fluid used in metal processing. This wastewater usually contains a high concentration of emulsified oil. Surfactants, heavy metals and other pollutants are difficult to deal with. As an effective wastewater treatment agent, demulsifier plays an important role in the treatment of cutting fluid wastewater. The following will elaborate the benefits of using demulsifier to treat cutting fluid wastewater.
The basic principle of demulsifier and its application in the treatment of cutting fluid wastewater
Demulsifier separates emulsified oil from water mainly by destroying the stability of oil-water interface. In cutting fluid wastewater, due to the presence of surfactants, oil and water form a stable emulsion. The function of the demulsifier is to reduce the surface tension of the oil-water interface, destroy the stability of the emulsion, and make the oil droplets gather into large oil droplets and float, so as to realize the separation of oil and water.
The main benefits of demulsifier treatment of cutting fluid wastewater
1. Improve the biodegradability of wastewater
The emulsified oil and surfactants in cutting fluid wastewater can inhibit microorganisms and reduce the biodegradability of wastewater. After treatment with demulsifier, these inhibitory substances can be effectively removed, and the biodegradability of wastewater is improved, which creates favorable conditions for subsequent biological treatment.
2. Reduce the difficulty of subsequent processing
Pollutants such as emulsified oil and heavy metal ions in cutting fluid wastewater will cause certain interference to subsequent treatment processes such as coagulation, precipitation and filtration. After treatment with demulsifier, the content of these pollutants is greatly reduced, the difficulty of subsequent treatment is correspondingly reduced, and the treatment effect will also be improved.
3. Reduce processing costs
Although the addition of demulsifier will increase a certain amount of pharmaceutical costs, due to the reduction of the difficulty of follow-up treatment, it can save a lot of energy, equipment, manpower and other costs. In summary, the use of demulsifier to treat cutting fluid wastewater can reduce the overall treatment cost:
4. Reduce environmental impact
If the pollutants such as emulsified oil and heavy metal ions in the cutting fluid wastewater are discharged directly without treatment, they will have a serious impact on the environment. After treatment with demulsifier, the emissions of these pollutants are greatly reduced, and the impact on the environment is correspondingly reduced
5. Improve the reuse rate of wastewater
The water quality of cutting fluid wastewater treated by demulsifier has been obviously improved and can be considered for reuse. This can not only reduce the use of fresh water, but also reduce the amount of wastewater treatment and achieve efficient use of resources.
Demulsifier selection and use precautions
In the selection of demulsifier, it is necessary to consider the nature of wastewater, treatment objectives, costs and other factors. At the same time, in the process of use, it is also necessary to pay attention to the amount of demulsifier, dosing method, reaction time and other factors to ensure the treatment effect.
Iv. Conclusion and Prospect
The use of demulsifier to treat cutting fluid wastewater has many benefits, including improving the biodegradability of wastewater, reducing the difficulty of subsequent treatment, reducing the cost of treatment, reducing the impact on the environment and improving the reuse rate of wastewater. With the continuous improvement of treatment requirements and the continuous development of industrial wastewater treatment technology, the application of demulsifier in cutting fluid wastewater treatment will be more and more extensive. In the future, we can look forward to the emergence of more effective demulsifiers to provide more effective solutions for the treatment of cutting fluid wastewater.
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