Table 3.

Hydraulic retention time and overall removal efficiency of CIP removal by column filters of different cross sectional areas, PG doses, and packing heights at constant dosage. Experimental conditions: ECs-contaminated DW influent adjusted at 10.5 mg/L of EC; room temperature at 22 ± 3 °C.

Contaminant	Test	Diameter of Column, mm	Material Dosage	Packing Height, mm	HRT through Reactive Layer, min	Overall Removal Efficiency %
CIP	Different cross sectional area	18	500 mg PG	25	11.45	76.71
		40	500 mg PG	5	11.31	85.85
	Different PG doses	18	500 mg PG	25	11.45	76.71
		18	50 mg PG	10	4.58	70.42
		40	500 mg PG (PG/SND 0.5% wt.)	45	47.50	91.42
		40	100 mg PG (PG/SND 0.5% wt.)	18	19.00	76.32
		40	250 mg PG (PG/SND 0.5% wt.)	27.5	29.03	81.10
		40	350 mg PG (PG/SND 0.5% wt.)	30	31.67	86.93
	Different packing heights at constant dosage	18	50 mg PG (PG/SND 0.25% wt.)	30	6.41	72.18
		18	50 mg PG	10	4.58	70.42
		40	100 mg PG (PG/SND 0.5% wt.)	18	19.00	76.32
		40	100 mg PG (PG/SND 0.25% wt.)	27.5	29.03	78.08
		40	100 mg PG (PG/SND 0.1% wt.)	45	47.50	80.86