Distillation of saline methanol-containing wastewater

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When working on a project, I encountered a case involving wastewater containing salts and methanol, and I faced difficulties in choosing the appropriate treatment process. According to water quality analysis, this wastewater contains sodium sulfate at a concentration of about 4%-5%, as well as methanol at a concentration of around 1%-1.5%. It was originally planned to send it directly through triple-effect evaporation treatment before proceeding with biological treatment. I then asked the manufacturers specializing in evaporation, and they said that there is a risk of explosion when using negative pressure to evaporate methanol wastewater; it’s better to distill it first. They recommended that I use distillation, as this would also allow for the recovery of methanol. The problem now is that the methanol content in my wastewater is so low – can it be distilled out? If possible, what percentage of methanol can be distilled out approximately? What is the approximate methanol content after distillation?