| Title |
Natural Organic Matter Fractions Changes and Coagulants Reduction Scheme by Controlled pH Adjustment of Each Coagulants |
| Authors |
서보인(Bo In Seo),정철우(Chul Woo Jung),한승우(Seung Woo Han),강임식(Lim Seok Kang) |
| Abstract |
This study was performed to determine the effectiveness of optimized coagulation for the removal of particles and organic matters when optimized coagulation (optimizing the pH of coagulation) was compared with conventional treatment. To determine optimized coagulation treatments, coagulants tested included alum, FeCl₃, and polyaluminum chloride (PACl). In addition, fractionation of organic matters was performed to characterize the changes in organic fractions according to the coagulation treatment conditions. Jar-test results indicate that the FeCl₃ coagulant was more effective than aluminum-based coagulant(Alum, PACl) in removing natural organic matter. The removal of organic carbon was enhanced at optimized coagulation conditions. In addition, optimizing coagulation pH can reduce coagulant dosage by as much as 72 percent compared with convention coagulation treatment. The strong hydrophobic acids(e.g.humic acid, fulvic acid) had more amenable to coagulation than the other nonhumic fractions. The fulvic acid of hydrophobics played a significant role in operation organic matters in raw water. |