| Title |
Application of Coagulant Mixture for Drinking Water Treatment |
| Authors |
주득종 ( Ju Deug Jong ) ; 김윤영 ( Kim Yun Yeong ) ; 이석훈 ( Lee Seog Hun ) ; 김영훈 ( Kim Yeong Hun ) ; 하태욱 ( Ha Tae Ug ) ; 양승태 ( Yang Seung Tae ) ; 최상준 ( Choe Sang Jun ) |
| Keywords |
PAC; Polyamine; Coagulant mixture; Coagulation; Settlability |
| Abstract |
Inorganic coagulants such as alum and PAC have been most commonly used in coagulation and sedimentation process for drinking water treatment. Organic polymeric coagulants have been successfully used as coagulant aid in other countries including U.S., Canada, Singapore. There are many known advantage of the polymeric coagulant. However, additional high cost feeding equipment is needed for application in water treatment plant and there are operational difficulties to feed optimal concentration. In this study, we are suggesting to use a mixture of PAC and polyamine to overcome the problems. We evaluate the feasibility of the coagulant mixture in mixing ratio, pH of the source water, floc Strength and settlability. Lower content of polymer less than 10% in mixture coagulant is better to prevent use of excess polymer coagulant. The mixture has wider application pH ranges than PAC only. The mixture coagulant was very effective in high turbidity water and reduced the sludge production. The mixture also formed stronger flocs and showed higher settlability. |