| Title |
Characterization of Anaerobic Degradation of Chlorophenols by the Anaerobic Sludges and Leachates |
| Authors |
신현옥 ; 조영하 ; 권오섭 ( Hyoun Ouk Shin ; Young Ha Cho ; O Seob Kwon ) |
| Abstract |
Anaerobic degradation of trichlorophenols (TCPs) and pentachlorophenol (PCP) were investigated using anaerobic digestor sludges from Jangrim and Suyong sewage treatment plants and the leachate from Kimhae waste landfill site. At low concentrations (20∼50μM) of TCPs, 2,3,4- and 2,3,6-TCPs were degraded more rapidly than 2,3,5-TCP, but at high concentrations (100∼500μM), the degradation rate was the fastest for 2,3,4 -TCP, followed by 2,3,5-TCP and 2,3,6-TCP. The sludge inoculum of Jangrim sewage plant degraded more actively chlorophenols than the other ones, perhaps due to the acclimation by the toxic pollutants from industrial wastewater. The addition of glucose enhanced the degradation of PCP in the inoculum from Jangrim plant and the organic materials increased the initial reaction rate more or less in Suyong sludge inoculum. In the inoculum of Kimhae, glucose inhibited the degradation of 2,3,4-TCP, 2,3,6-TCP, and PCP, but enhanced the degradation of 2,3,5-TCP. The effects of casamino acid and acetic acid were also different according to the types of inocula and chlorophenols. The reductive dechlorination of chlorophenols in the same inoculum appeared to be congener-specific rather than substitution position-specific because chlorines were removed each from ortho-, meta-, and para-position of phenolic group. |