Research on Purification of AKD Wastewater by Resin Adsorption-NaClO Oxidation Method
In view of the problems of large amount of solid waste,non-recyclability,high energy consumption and high treatment cost caused by the multi-effect evaporation method to treat alkylene ketone dimer(AKD)by-product wastewater,the technology of purifying AKD wastewater by combining adsorption method and chemical oxidation method was studied.The results show that after the AKD wastewater is adsorbed by LS-200 resin in the first step,the total NH4+(total ammonium)is less than 4 mg/L,and the wastewater treatment capacity is 500 BV(bed volume).The second step of chemical oxidation uses single factor optimization to determine the optimal reaction conditions.The oxidant is NaClO,the dosage is 0.5%,pH=3.0,the reaction temperature is 60 °C,the reaction time is 0.5 h,the TOC(total organic carbon)in wastewater is less than 10 mg/L.The treated AKD wastewater index meets the requirements of brine electrolysis,effectively improving energy utilization efficiency and realizing circular economy.
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