
Keywords: جامد معلق; BOD5; biochemical oxygen demand after 5â¯days; CODcr; K2Cr2O7-based chemical oxygen demand; NH4-N; ammonia-N; SS; suspended solid; TP; total phosphate; Cu; copper; Cd; cadmium; Cr; chromium; Pb; lead; Hg; mercury; F-WWTP; pretreatment inside factories; C