Identification of bacteria in drinking and purified water during the monitoring of a typical water purification system

Table 3 The minimum inhibitory concentrations (MIC) for chemical agents for the reduction of bacteria populations over 6-log₁₀.

Bacteria	Pseudomonas aeruginosa		Pseudomonas diminuta		Pseudomonas fluorescens		Pseudomonas alcaligenes		Pseudomonas picketti		Flavobacterium aureum		Acinetobacter lowffi
MIC test	mg/L	%	mg/L	%	mg/L	%	mg/L	%	mg/L	%	mg/L	%	mg/L	%
Agent (initial concentration & pH)
Ethanol (70%; pH = 7.2)	175000	17.5	87500	8.75	87500	8.75	87500	8.75	87500	8.75	87500	8.75	87500	8.75
Sodium Hypochlorite (0.5%; pH = 11.9)	2500	0.25	2500	0.25	2500	0.25	2500	0.25	2500	0.25	2500	0.25	2500	0.25
PAA (0.45%) + H₂O₂ (2.2%) (pH = 2.3)	1125	0.11	562	0.056	140	0.014	280	0.028	1125	0.11	1125	0.11	1125	0.11
	5500	0.55	2750	0.275	680	0.068	1368	0.14	5500	0.55	5500	0.55	5500	0.55
Sodium Hydroxide (0.4%; pH = 12.8)	3000	0.3	1500	0.15	1500	0.15	750	0.075	3000	0.3	3000	0.3	4000	0.4
Citric acid (0.5%; pH= 2.5)	2500	0.25	2500	0.25	2500	0.25	2500	0.25	5000	0.5	2500	0.25	600	0.06
Hydrochloric Acid (0.3%; pH= 0.3)	1560	0.16	1560	0.16	780	0.078	1560	0.16	3125	0.31	1560	0.16	390	0.039
Sodium Bisulfite (1.0%; pH= 4.0)	780	0.078	780	0.078	780	0.078	390	0.039	780	0.078	780	0.078	780	0.078

ISSN: 1471-2458