Table 2.

Effect of time on growth of E. coli O157:H7 mixed with white alum in comparison with control (BAC+PW)

Treatments	Time (Hours after mixing)
	0.5	1	1.5	2	2.5	3	3.5	4
BAC+Z0.25 vs BAC+PW	■	■	■	■	■
BAC+Z0.5 vs BAC+PW	■	■	■			■	■	■
BAC+Z1 vs BAC+PW						■		■
BAC+Z2 vs BAC+PW					■	■	■	■

The treatments that are significantly different (p<0.05) from each other at the same time point indicated by ■.