With the decrease in BTEX concentration from inlet (#1) to outlet
(#4) of the PRB because of biodegradation by Mycobacterium sp.
CHXY119 and Pseudomonas sp. YATO411 immobilized beads, the
dilution factor for 50% of luminescence inhibition decreased from
38.6 to 3.4, toxicity fell by 91.2% (Table 1). Although complete toxicity
removal was not achieved after bioremediation, the 91.2% of
toxicity removal exhibited the great potential of the bioaugmentation
process by Mycobacterium sp. CHXY119 and Pseudomonas sp.
YATO411 immobilized bead for remediation of the high concentration
BTEX-contaminated groundwater.