Application of Nanometal Oxides In Situ in Nonwoven Polyester Fabric for the Removal of Bacterial Indicators of Pollution from Wastewater

Table 4

Effect of contact time for reduction of total and fecal coliforms from secondary treated effluent using nano-Ag-oxide.

Time	Control		Nano-Ag-oxide
	Total coliforms (MPN-index/100 mL)	Fecal coliforms (MPN-index/100 mL)	Total coliforms		Fecal coliforms
			Conc.; (MPN-index/100 mL)	% of removal	Conc.; (MPN-index/100 mL)	% of removal
Zero time	4.1×10^3	1.8×10^2	4.1×10^3	0.0	1.8×10^2	0.0
2 min	4.6×10^3	1.7×10^2	1.1×10^3	73.2	1.4×10^2	22.2
5 min	5.1×10^3	2.1×10^2	7.5×10^2	81.7	1.1×10^2	38.9
10 min	5.7×10^3	2.6×10^2	1.8×10	99.6	1.5×10	91.7
15 min	6.2×10^3	3.1×10^2	1.5×10	99.6	1.0×10	94.4
20 min	6.4×10^3	4.1×10^2	1.1×10	99.7	5.3	97.1
30 min	6.8×10^3	5.8×10^2	1.0×10	99.8	5	97.2