Recycling of industrial wastewater containing ethanol
Thread Content
There is now a type of industrial wastewater that contains 15–20% ethanol and 80–85% water, with a flow rate of 5 tons per hour. It is desired to recover the water from this wastewater, with the ethanol content in the resulting water not exceeding 2%. What method would be suitable for this purpose?
For industrial wastewater containing ethanol, you can consider using distillation for recovery and separation. Distillation is a method for separating the components of a mixture based on their boiling points. Here are the specific steps: 1. Heat the industrial wastewater to above 100°C to initiate boiling. 2. The boiling point of ethanol is 78.4°C, while that of water is 100°C; therefore, when the wastewater is heated to 100°C, ethanol will start to evaporate first. 3. Cool the ethanol vapor through a condenser to turn it back into a liquid state, thereby obtaining pure ethanol. 4. By removing some of the ethanol from the residual wastewater, its ethanol content is reduced, allowing it to be further processed or discharged. It should be noted that in practical operations, safety issues also need to be taken into account, such as explosion-proof and fire-prevention measures, as well as the treatment of waste gases and liquids. At the same time, energy may be consumed during the distillation process, so the issue of energy utilization also needs to be taken into account. In summary, treating industrial wastewater containing ethanol through distillation can effectively recover ethanol and keep its concentration within the required range. .
After purification, it is exported abroad to be sold as cocktails.
A distillation recovery process is used for continuous operation at atmospheric pressure; the top product of the tower is ethanol + water, while the ethanol in the bottom of the tower can be processed to
This post was last edited by Dugu Wuyou on 2023-9-8 at 10:14. What do you know about azeotrope composition? Not to mention distillation, even with rectification you can’t obtain pure ethanol
Is this recycled water, and not alcohol?
Sell it to the Japanese to use as sake, so those little Japs don’t have to dump nuclear wastewater into the sea.
Distillation can be used; when the water quality meets the standards, ethanol can even be recovered. Feel free to contact me if needed.
Check how much processing capacity there is. For small quantities, single-column distillation is used; for larger quantities, double-effect or triple-effect distillation is employed.
Didn’t you see that it was said to be 95%? Distillation can achieve that