Impact of Cr(VI) on P removal performance in enhanced biological phosphorus removal (EBPR) system based on the anaerobic and aerobic metabolism

► Cr(VI) had a significant toxity effect on EBPR system. ► PAOs were more sensitive to Cr(VI) than GAOs and the other bacteria were. ► P removal performance in EBPR system was able to recover after 5 mg L−1 Cr(VI) shock.