Table 2 Total enumeration (CFU/100 mL) and identification of Gram-negative non-fermenting bacteria from the genera:Pseudomonas, Flavobacterium, Acinetobacter identified by the BBL Crystal kit (Becton Dickinson) and API 20 NE kit (bioMérieux), at every sampling point.
Sampling points/Flow sheet | CFU/100 mL Average ± SD | Colonies | identification | ||
|---|---|---|---|---|---|
Morphology & color | Number of isolates | BBL Crystal | API 20 NE | ||
Point 1 Feed Water (storage) | 507 ± 50 | Shining beige | 02 | F. multivorum | P. vesiculares |
Circular Brown | 02 | P. aeruginosa | P. alcaligenes | ||
Circular pumpkin | 02 | P. diminuta | P. diminuta | ||
Point 2 Two multimedia Filters | 33 ± 12 | Circular pumpkin | 02 | P. diminuta | P. diminuta |
Circular pumpkin | 02 | P. diminuta | P. diminuta | ||
Circular pumpkin | 02 | P. diminuta | P. diminuta | ||
Point 3 Two water softeners | 173 ± 50 | Circular pink | 02 | F. aureum | P. vesiculares |
Circular pink | 02 | F. aureum | P. vesiculares | ||
Circular pink | 02 | F. aureum | P. vesiculares | ||
Point 4 Activated carbon filter | 897 ± 823 | Circular brown | 02 | P. aeruginosa | P. pcketti |
Circular white | 02 | F. aureum | P. vesiculares | ||
Circular pink | 02 | P. vesiculares | P. vesiculares | ||
Point 5 One 5 micron filter | 100 ± 20 | Circular white | 02 | F. aureum | P. vesiculares |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. aeruginosa | ||
Point 6 Reverse Osmosis | 8 ± 2 | Circular beige | 02 | P. vesiculares | P. vesiculares |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Point 7 Continuous deionization | 653 ± 344 | Circular brown | 02 | P. aeruginosa | P. fluorescens |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. aeruginosa | ||
Point 8 Storage tank for the purified water. | 40 ± 35 | Circular brown | 02 | P. aeruginosa | P. picketti |
Pointed yellow | 02 | A. lwoffi | P. diminuta | ||
Pointed cream | 02 | P. fluorescens | P. putida | ||
Point 9 Light UV | 27 ± 12 | Circular brown | 02 | P. aeruginosa | P. picketti |
Pointed cream | 02 | P. paucimobilis | P. putida | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Point 10 0.05 micron Filter | 87 ± 31 | Circular brown | 02 | P. aeruginosa | P. picketti |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Point 11: use | 27 ± 12 | Circular brown | 02 | P. aeruginosa | P. fluorescens |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Point 12: use | 27 ± 12 | Circular brown | 02 | P. aeruginosa | P. picketti |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Point 13: use | 27 ± 12 | Circular brown | 02 | P. aeruginosa | P. picketti |
Circular brown | 02 | P. aeruginosa | P. picketti | ||
Circular brown | 02 | P. aeruginosa | P. picketti | ||