Table 1 Mean water quality parameters.

From: Responses of drinking water bulk and biofilm microbiota to elevated water age in bench-scale simulated distribution systems

 

Tap Reservoir

Reactor Bulk

Reactor Biofilm

 

Phase I Mean Conc.

Phase II Mean Conc.

Phase I Mean Conc.

Phase II Mean Conc.

Phase I Final Conc.

Phase II Final Conc.

Total Chlorine

1.5 mg/L

0.74 mg/L

0.62 mg/L

0.11 mg/L

-

-

TCC

5.3 × 103 cells/mL

1.2 × 104 cells/mL

3.9 × 104 cells/mL

1.9 × 105cells/mL

3.2 × 105 cells/cm2

1.3 × 106 cells/cm2

ICC

9.9 × 102 cells/mL

2.5 × 103 cells/mL

2.2 × 104 cells/mL

1.3 × 105 cells/mL

5.6 × 104 cells/cm2

5.6 × 105 cells/cm2

ATPt

1.0 × 10−3 nM

4.6 × 10−3 nM

1.1 × 10−2 nM

4.4 × 10−2 nM

6.1 × 10−5 nmol/cm2

4.9 × 10−4 nmol/cm2

ATPi

4.6 × 10−4 nM

7.9 × 10−4 nM

7.5 × 10−3 nM

3.8 × 10−2 nM

1.6 × 10−5 nmol/cm2

1.8 × 10−4 nmol/cm2

Temp.

22.6 °C

23.7 °C

22.4 °C

23.5 °C

-

-

pH

7.78

7.69

8.85

8.78

-

-

  1. Mean concentrations of bulk water quality parameters and final concentrations of biofilm parameters in each phase in the tap reservoir and reactors. Geometric means are presented for cell counts and activity, while arithmetic means are presented for all other parameters.
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