***the separation problem

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I am involved in the treatment of nitration wastewater. The biggest problem at the moment is that the DNT concentration in the nitration wastewater is as high as 1000 mg/L. I would like to ask everyone what methods can be used in nitration processes to separate the nitration product DNT from the acid, so as to keep the DNT concentration in the wastewater low I would like to ask everyone for any good suggestions Our company uses a pump-based mixed-acid process for mixing; during the separation step, DNT is separated out based on the density difference between the mixed acid and DNT. Then process water is added, and a type of tetrafluoro fiber is used to separate the aqueous phase from the DNT phase. The aqueous phase is sent to the wastewater stream, but this wastewater contains a high amount of DNT, making it difficult to treat. In short, is there any good method to reduce the DNT content? Thank you to all the teachers.