TABLE 1.
Chemical and biological characteristics of inlet water and Propella reactors A and B before and after introduction of M. xenopia
| Water or biofilmb | pH | TOC (mg/liter) | Free chlorine (mg/liter) | Total chlorine (mg/liter) | Culturable bacteria after 72 h (CFU)c | Total cell countc |
|---|---|---|---|---|---|---|
| Inlet water | 7.5 ± 0.19 | 1.2 ± 0.2 | 0.03 ± 0.01 | 0.04 ± 0.01 | 56 ± 27 | (1.76 ± 0.16) × 105 |
| Outlet water (Propella reactors A and B) | ||||||
| Before M. xenopi (n = 5) | 7.6 ± 0.1 | 1.2 ± 0.2 | 0d | 0 | (4.5 ± 4.7) × 103 | (3.2 ± 1.4) × 105 |
| After M. xenopi (n = 9) | 7.6 ± 0.2 | 1.3 ± 0.2 | 0 | 0 | (4.5 ± 8.5) × 103 | (3.6 ± 1.3) × 105 |
| Biofilm (Propella reactors A and B) | ||||||
| Before M. xenopi (n = 2) | (1.1 ± 0.5) × 105 | (62 ± 2.9) × 105 | ||||
| After M. xenopi (n = 9) | (1.3 ± 2) × 105 | (84 ± 31) × 105 |
a
All values are averages ± standard deviations.
b
n, number of analyses used for the calculation of averages.
c
Values are per milliliter for water and per square centimeter for biofilm.
d
A value of zero indicates a measurement below the detection limit of 0.02 mg/liter.