Applications of ultrasound in electrodialysis
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Today I read an article saying that using ultrasound for demulsification can save money on demulsifiers. It can also reduce the COD and oil content in the electrodialysis wastewater. Has anyone been in contact with it? Is this thing reliable? Let me give some information on it
The effectiveness of demulsification depends on the contact area between the crude oil and other substances. Ultrasound can further break down relatively large water (oil) droplets into smaller ones, thereby increasing the contact area and improving the efficiency of the demulsifier, which in turn reduces the amount of demulsifier required. You can refer to https://wenku.baidu.com/view/4f8b9f4602d8ce2f0066f5335a8102d276a26116.html to see the practical results of other organizations.
Ultrasonic waves can emulsify or demulsify; I think it’s reliable, as it’s a physical process. As for the claim that it can reduce the COD of the water produced by electrodialysis, that’s nonsense It is possible to reduce oil emissions a bit, but I really doubt it’s possible to lower the COD of the wastewater. COD generally refers to a measure of organic substances dissolved in water. An increase in COD is caused by poor separation of oil from water, and it represents a problem related to the processing of the sample.
Ultrasonic waves only serve to separate the emulsified oil, but they have little effect on reducing COD; one of the substances that gets dissolved is saturated.
Ultrasonic demulsification – are there any specific examples around you? I’d like to know how effective it is