Folic acid wastewater treatment process

The invention belongs to an industrial wastewater treatment process, and specifically relates to a folic acid wastewater treatment process. The folic acid wastewater treatment process comprises the following steps: precise filtration of folic acid wastewater: the precise filtration is precoating filtration or direct filtration; acid separation, purification and recycling: a step of adsorbing hydrochloric acid and sulfuric acid in precisely-filtered wastewater by adopting macroporous resin, after adsorption saturation of the macroporous resin, carrying out backwashing with purified water, and carrying out desorption so as to obtain a mixed acid solution of hydrochloric acid and sulfuric acid, wherein the residual is ammonia-nitrogen wastewater; ammonia-nitrogen separation, purification and recycling: a step of subjecting the ammonia-nitrogen wastewater to deamination through a gas membrane method at normal temperature so as to remove ammonia-nitrogen substances from the ammonia-nitrogen wastewater; and neutralization: a step of mixing the above-mentioned obtained mixed acid of hydrochloric acid and sulfuric acid with the ammonia-nitrogen substances, adjusting the amount of the mixed acid and the ammonia-nitrogen substances until the pH of a mixed solution to be neutral, and subjecting the neutralized solution to filtering with a filter membrane so as to obtain an ammonium chloride/ammonium sulfate mixed nitrogen fertilizer and a residual solution. Thus, the folic acid wastewater treatment process provided by the invention realizes wastewater treatment up-to-standard discharge and waste recycling, reduces cost and increases benefits for enterprises, and facilitates energy conservation and emission reduction at the same time.