Abstract
In order to improve process performances of magnetic bead column reactor (MBCR) on denitrification, a turn table mode MBCR (TMBCR) was employed. Compared to a fixed bed mode MBCR (FMBCR), TMBCR had a rotating magnet turn table for the formation of a mobilized bead bed. Due to this function, TMBCR was expected to overcome the clogging problem in or on the bead bed. At 1 hour of HRT, TMBCR provided 90.69% of nitrate-N removal efficiency and 97.44mg N/l/hr of nitrogen removal rate which are 10% and 23% higher than those of FMBCR, respectively. And also, TMBCR increased the maximum applicable nitrate-N loading rate from 70 to 107.19mg N/l/hr. Additionally, scanning electrode microscope (SEM) observations of magnetic immobilized cell beads were conducted. In order to establish visible investigations of the magnetic cell beads and the immobilized microorganisms with SEM, an appropriate pretreatment method was proposed in this study.
