Wastewater treatment process for fine chemical pharmaceutical intermediates

The invention discloses a process for treating fine chemical medical intermediate wastewater, which comprises a pretreatment section of a Fe/C microelectrolysis unit, a multi-effect evaporation unit and an advanced oxidation unit, a biochemical section of an enhanced AO biological contact oxidation unit and an MBR unit, and a deep treatment section of DTRO membrane recycling. The pyrolysis section comprises a concentrated salt solution pyrolysis gasification unit and a flue gas treatment unit. The medical intermediate high-salt-content wastewater is subjected to multi-effect evaporation and pyrolysis treatment, the treatment amount and treatment cost of waste salt can be reduced, the environmental protection fund pressure of enterprises is reduced, pretreatment, biochemical treatment and deep treatment are combined for treatment, the influence of the water quality of raw water is small, operation has flexibility and impact resistance, effluent is stable and reaches the standard, and the treatment cost is low.