Environmental Systems Research

Table 3 The removal efficiency of pollutions based on effluent water and raw sewage values

From: Impact assessment of treating wastewater on the physiochemical variables of environment: a case of Kermanshah wastewater treatment plant in Iran

No.	Pollution	Time	Raw sewage	Effluent water	Efficiency (%)
1	TSS (mg/l)	April	110	20	81
1	TSS (mg/l)	July	140	25	82
5	NO₃ (mg/l)	April	10	10	–
5	NO₃ (mg/l)	July	200	20	90
7	BOD (mg/l)	April	125	15	88
7	BOD (mg/l)	July	200	15	92
9	COD (mg/l)	April	390	40	89
9	COD (mg/l)	July	400	80	80

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