Hello,
I am currently designing a process for the production of propylene glycol for my design project. We have chosen to purify acetol in a distillation column by separating acetol from a mixture containing water, methanol, ethanol and propanol. I am wondering how to deal with the wastewater from this distillation column. We have 218kmol/h of this wastewater so ideally would like to deal with this large amount on site so we can recycle it for use as grey water and for utilities. What are the most cost-effective options for managing this stream? We are trying to be economicaaly viable and seems many options are expensive. The composition is 99.1% water, 0.37% methanol, 0.19% ethanol, 0.3% propanol and 0.0028% acetol. There is also the option of sending the water off to a nearby treatment facility, however the goal of the design project is to be as sustainable as possible.
Thank you for any help!