Ion Exchange Feed Water Quality Consideration

I am working in wastewater treatment in a petrochemical company, we want to reuse the effluent from Active sludge treatment by EDR (Pretreatments are lime softening, sand, active carbon and cartridge filter ). The end user of this effluent is boiler so  Ion exchange system (cation and Anion bed and mixed bed) are used for desalination water after EDR, I want to know the quality of EDR effluent suitable for Ion exchange resins.