| Title |
Manganese Removal of Bank Filtrate using Manganese Sand Filtration |
| Authors |
김충환 ( Chung Hwan Kim ) ; 김학철 ( Hak Chul Kim ) ; 김한승 ( Han Seung Kim ) ; 김범수 ( Berm Soo Kim ) ; 안효원 ( Hyo Won Ahn ) |
| Keywords |
Bank filtration; Manganese removal; Manganese sand; Chlorination; pH control |
| Abstract |
Pilot-scale experiments were performed for the treatment of bank filtrate containing high manganese concentration around 2 ㎎/L using rapid manganese sand filtration to investigate effects of oxidant dose and pH control on the removal efficiency of manganese. For theoretical dose ranges of oxidant (sodium hypochlorite) between 3 and 4 ㎎/L, the manganese concentration of effluent was 0.57 ㎎/L, which corresponded to 72.5% removal and was higher than drinking water quality standards of 0.3 ㎎/L. For excess dose ranges of oxidant between 4 and 8 ㎎/L, the manganese concentration of effluent was reduced to 0.14 ㎎/L, which corresponded to 94.5% removal, but the residual chlorine concentration was over 1.0 ㎎/L. On the other hand, manganese removal efficiency drastically increased up to the value of 98.0%, which is equivalent to the effluent concentration of 0.03 ㎎/L by controling pH to the range between 7 and 8 for the theoretical dose of oxidant. Consequently, these results indicated that appropriate dose of chemicals, such as oxidant and alkali, and continuous monitoring of manganese should be necessary to obtain efficient removal of manganese and to optimize the maintenance of treatment facilities for the treatment of bank filtrate with high concentration of manganese. |