Bioaugmented remediation of high concentration BTEX-contaminated groundwater by permeable reactive barrier with immobilized bead

► High concentration BTEX-polluted groundwater was remediated using bioaugmentation process. ► The actual mineralization rate was 5.8-11.4% depending on the BTEX compound. ► The low mineralization rate indicated that BTEX bioremediation requires a low oxygen supply. ► Bioaugmentation-PRB yielded much higher remediation efficiency compared to biostimulation. ► The CHXY119 & YATO411 immobilized bead has great potential for practical applications.