| Title |
Enhanced Thickening and Dewatering Characteristics of Water Treatment Sludge by Organic Polymers |
| Authors |
윤조희(Cho Hee Yoon),문성용(Seong Yong Moon),김승현(Seung Hyun Kim) |
| Abstract |
This study investigated effects of organic polymers on treatment of water treatment sludge. For this purpose, sludge samples were taken from two different water treatment plants: lake and river sources. This study found that polymers were able to improve thickening as well as dewatering characteristics of sludge. There was an optimum polymer dose which was dependent upon sludge TS. Cationic or anionic polymer was a better choice to improve the sludge characteristics than nonionic polymer. Polymer with molecular weight less than 10^5 was unable to improve the sludge characteristics while that with molecular weight greater than 4 × 10^6 was. Sludge thickening and dewatering characteristics were improved by 18% and 13% when polymer was used for thickening and dewatering stages instead of dewatering stage only. Unlike polymer, ferric chloride or alum was unable to improve the sludge characteristics. However, lime did improve the sludge characteristics. The performance of lime was dependent upon sludge pH. When sludge pH was increased over 10, sludge characteristics began to improve. |