Treatment methods for oily wastewater
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The oily wastewater discharged from the electrodesalination system of the atmospheric and vacuum distillation unit contains a high level of salts; can it be directly fed into the plant’s wastewater treatment system? If not, what is the best way to treat it?
:) It depends on what range your wastewater treatment plant can handle. If that doesn’t work, then congratulations to you – you’ll have to install your own wastewater treatment equipment. Oil-containing wastewater is generally not accepted. You need to consider the following for this: whether it can be processed separately, whether the oil can be recycled, and whether the wastewater should be discharged directly or sent to equipment for treatment
The wastewater from asphalt electrodialysis is mainly rich in oil; separating the oil is sufficient
I’m not sure what level your wastewater treatment system is at. It’s correct that electrodialysis-treated wastewater has a high salt content, and it’s also normal to have a small amount of oil in it; however, if the oil content is high, that’s a problem. If the oil-water separation isn’t effective, consider using demulsifiers, or check whether the interfacial tension is too low, or perhaps the electric field strength isn’t sufficient. We’ve encountered this issue before as well, and after making various adjustments, switching to demulsifiers resolved the problem
How much traffic do you have? What is the oil concentration in the water? Under normal circumstances, a set of oil-containing wastewater treatment equipment is installed directly to recycle the treated water (5PPM)
Oil removal must be carried out first; congratulations, you now need to adopt a new process
What is the oil content in the water? What’s the status? We specialize in oil-water separation; feel free to contact us if you need it, Zhang at 15700167899
The oily wastewater discharged from the electrodesalination system of atmospheric and vacuum distillation units can be directly fed into the wastewater treatment system without any problem. I have been working in this industry for over 20 years, and I’ve never heard that such wastewater cannot be sent to wastewater treatment plants. It first goes into a regulating tank, then into an oil separation unit, and finally into an air flotation unit. . .
Adding demulsifiers to reduce the oil content in wastewater is not sufficient for use in oil separation equipment; the oil content must be reduced first
What was said upstairs is absolutely correct. Take our case as an example: high salt content generally doesn’t cause any problems for sewage treatment plants, but if there’s a high oil content, then those plants simply can’t function. In my opinion, when it comes to wastewater treatment, COD is the key factor to consider; oil has a more significant impact on increasing COD compared to salt.