| Title |
Removal Characteristics in Biological Treatment of Phenol Wastewater Containing 2,4-Dichlorophenol by SBR/GAC-SBB |
| Authors |
윤조희 ( Cho Hee Yoon ) ; 정기홍 ( Gi Hong Jung ) ; 김승현 ( Seung Hyun Kim ) ; 하성룡 ( Sung Ryong Ha ) |
| Abstract |
This study was conducted to investigate treatability for toxic wastewater in biological treatment process using activated sludge. The sequencing batch reactor(SBR) processes with/without granular activated carbon(GAC) addition were employed for the purpose. And the wastewater was used phenolic compounds such as phenol and 2,4-dichlorophenol (2,4-DCP) which were recalcitrant and toxic chemicals. The variation of influent concentration was selected as operating parameters. The results obtained from this study are as follow; In adsorption test on GAC. K values of phenol and 2,4-DCP were 40.9, 146.4 and 1/n were 0.25 and 0.15 respectively. Stability of process was shown more in GAC-SBR than in SBR but microbial acclimation period for target materials took similarly about 85 days in both processes. Removal efficiencies for two compounds were about 100% under all operating condition after acclimation and MLSS concentration was gradually increasing due to granulation phenomena. In phenol and 2,4-DCP behavior for a cycle period, most of these compounds were simultaneously removed for the initial fill time under steady state. The effluent pH drop may be caused by release of hydrogen(H^+) and chloride(Cl^-) ions which resulted from biological decomposition of 2,4-DCP. |