How to effectively remove methanol from water, with a concentration of about 1%
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The company uses atmospheric distillation to recover methanol from water; after the distillation process, the methanol content in the water is approximately 1%. This wastewater is then sent to wastewater treatment facilities, which results in a high COD level in the wastewater. I would like to ask experts in the chemical industry: are there any effective methods to remove the 1% of methanol remaining in the water? I saw something about 5A molecular sieves before – is that a viable option? Thank you!
This post was last edited by 678 on 2015-12-15 at 10:20. It is recommended that you use a stripping tower to remove ethanol from the water. The tower can use a 2-stage packed tower. The gas can be compressed air or steam. Water containing ethanol enters from the upper part of the tower, while the gas enters from the lower part of the tower. The gas (vapor)-ethanol mixture exits from the top of the tower; it can be sent to an incinerator for burning, or it can be condensed and collected for reuse in the system. The water free of ethanol is discharged from the bottom of the tower and sent for wastewater treatment. This method is effective at removing small amounts of low-boiling substances from water. Using this method, it is possible to remove more than 99% of the small amounts of acetaldehyde or **furan present in wastewater. For your reference
Thank you very much for your professional answer!