With the implementation of Standards for drinking water quality(GB 5749-2022),the water quality of urban water supply has been further improved,while bringing challen-ges to some conventional treatment plants that only use coagulation,precipitation,filtration and disinfection.In order to ensure the quality of treated water about 2-Methylisoborneol(2-MIB)is up to standard and stable,the conventional treatment process water treatment plant will use pow-dered activated carbon to remove them.Through the systematic study on the effect of the dosage,adsorption time and dosage point about powdered activated carbon on 2-MIB removal in actual pro-duction process,combined with the quality of treated water,operation management efficiency and economic evaluation,the application of powdered activated carbon to remove 2-MIB from drinking water was determined to be a viable technology.The results showed that when the concentration of 2-MIB of raw water was(61.2±3.70)ng/L,the removal rate and amount of 2-MIB increased with the addition of 5～40 mg/L powdered activated carbon with the extension of adsorption time within the adsorption time range of 0～330 minutes;when the adsorption time was 300 min,2-MIB was reduced from(61.05±2.24)ng/L to less than 10 ng/L by adding 40 mg/L powdered activated carbon;the 2-MIB removal effect of multistage dosing of powdered activated carbon was obviously better than that of single dosing of raw water,when the concentration of 2-MIB of raw water was(63.85±22.13)ng/L the removal rate of 2-MIB by adding 50 mg/L powdered activated carbon in stages was(85.1±2.63)％.The average removal rate of permanganate index increased from 70.4％to 78.4％,and the average removal rate of total organic carbon increased from 39.8％to 47.6％.
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