Microbial analysis of secondary effluent

Bacterial population	Secondary Effluent	Applied ozone doses
		5 mgL^-1			10 mgL^-1			15 mgL^-1
		2 min.	5 min.	10 min.	2 min.	5 min.	10 min.	2 min.	5 min.	10 min.
Total coliform (MPN/100 ml)	254000	540000	19000	12000	14000	900	600	500	400	400
Fecal coliform (MPN/100 ml)	209000	209000	15000	8900	9900	600	500	450	400	300
E. Coli (MPN/100 ml)	210000	210000	16000	9500	8400	600	400	200	200	200

Table 1: Microbial analysis of secondary effluent treated at various ozone dosage and reaction times.

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