Fig. 4From: Treatment performance comparison between regular O3–BAC and O3–BAC with rear sand filtration: verification in a full-scale studyChanges of CODMn concentrations along the treatment trains. a sand–O3–BAC, b O3–BAC–sand. RW raw water; SE sedimentation; SF sand filtration; PO post-ozonation. The error bars represent mean ± S.DBack to article page