Table 2 Microbial counts (logCFU/mL) in raw and SC-CO2-treated cane juice.

From: The potential use of supercritical carbon dioxide in sugarcane juice processing

Trial

Treatment

Coliforms (45 °C)

Mesophiles

Lactic bacteria

Molds and yeasts

 

raw

1.5 ± 0.2

3.6 ± 0.1

1.0 ± 0.0

3.5 ± 0.3

1

213 bar/50 °C/45 min

<1est

1.8 ± 0.1

<1est

1.1 ± 0.1

 

log red

>0.5 est

1.8

-

2.4

 

raw

<1est

3.1 ± 0.4

2.6 ± 0.3

3.5 ± 0.3

2

130 bar/40 °C/30 min

<1est

2.7 ± 0.1

1.2 ± 0.2

1.4 ± 0.2

 

log red

-

0.4

1.4

2.1

 

raw

<1est

4.6 ± 0.3

1.3 ± 0.1

2.4 ± 0.2

3

295 bar/40 °C/30 min

<1est

2.6 ± 0.3

< 1est

0.3 ± 01

 

log red

-

2.0

> 0.3 est

2.1

 

raw

2.5 ± 0.1

4.6 ± 0.2

3.0 ± 0.2

4.2 ± 0.4

4

130 bar/60 °C/30 min

0.7 ± 0.2

1.6 ± 0.1

1.0 ± 0.2

1.0 ± 0.1

 

log red

1.8

3.0

2.0

3.2

 

raw

1.3 ± 0.3

3.7 ± 0.1

3.1 ± 0.2

3.8 ± 0.5

5

295 bar/60 °C/30 min

<1est

1.5 ± 0.1

1.5 ± 0.2

1.6 ± 0.3

 

log red

>0.3

2.2

1.6

2.2

 

raw

<1est

4.9 ± 0.3

3.0 ± 0.3

4.1 ± 0.3

6

213 bar/50 °C/45 min

<1est

1.7 ± 0.2

1.6 ± 0.3

0.9 ± 0.2

 

log red

-

3.2

1.4

3.2

 

raw

2.3 ± 0.1

2.7 ± 0.2

2.2 ± 0.2

4.9 ± 0.3

7

130 bar/40 °C/60 min

<1est

<1est

2.1 ± 0.2

1.7 ± 0.2

 

log red

>1.3est

>1.7est

0.1

3.2

 

raw

<1est

6.0 ± 0.3

3.5 ± 0.2

4.1 ± 0.3

8

295 bar/40 °C/60 min

<1est

2.1 ± 0.2

1.4 ± 0.2

1.8 ± 0.2

 

log red

-

3.9

2.1

2.3

 

raw

3.5 ± 0.3

4.7 ± 0.3

< 1est

5.4 ± 0.2

9

130 bar/60 °C/60 min

2.2 ± 0.1

1.7 ± 0.1

< 1est

2.6 ± 0.1

 

log red

1.3

3.0

-

2.8

 

raw

5.2 ± 0.1

3.0 ± 0.1

4.0 ± 0.1

4.9 ± 0.6

10

295 bar/60 °C/60 min

2.9 ± 0.3

2.0 ± 0.3

2.2 ± 0.1

1.5 ± 0.1

 

log red

2.3

1.0

1.8

3.4

 

raw

3.9 ± 0.1

2.0 ± 0.2

2.1 ± 0.2

4.9 ± 0.4

11

213 bar/50 °C/45 min

1.4 ± 0.3

1.9 ± 0.1

0.7 ± 0.1

2.7 ± 0.2

 

log red

2.5

0.1

1.4

2.2

 

raw

3.3 ± 0.1

5.5 ± 0.6

0.7 ± 0.2

4.8 ± 0.4

12

74 bar/ 50 °C/ 45 min

2.3 ± 0.4

3.2 ± 0.2

0.4 ± 0.2

1.9 ± 0.1

 

log red

1.0

2.3

0.3

2.9

 

raw

3.4 ± 0.2

5.6 ± 0.1

3.9 ± 0.2

4.2 ± 0.4

13

351 bar/50 °C/45 min

2.5 ± 0.2

3.6 ± 0.3

2.8 ± 0.2

1.8 ± 0.3

 

log red

0.9

2.0

1.1

2.4

 

raw

3.3 ± 0.1

5.6 ± 0.3

1.2 ± 0.1

5.1 ± 0.5

14

213 bar/33 °C/45 min

2.8 ± 0.2

2.8 ± 0.1

< 1est

2.6 ± 0.3

 

log red

0.5

2.8

> 0.2est

2.5

 

raw

1.8 ± 0.2

5.9 ± 0.5

2.5 ± 0.4

4.7 ± 0.1

15

213 bar/67 °C/45 min

<1est

4.1

< 1est

0.6 ±

 

log red

>0.8est

1.8

0.0

4.1

 

raw

2.8 ± 0.3

5.3 ± 0.5

3.7 ± 0.1

5.3 ± 0.2

16

213 bar/50 °C/20 min

0.8 ± 0.1

3.2 ± 0.2

3.5 ± 0.3

1.8 ± 0.2

 

log red

2.0

2.1

0.2

3.5

 

raw

2.9 ± 0.2

4.8 ± 0.1

3.6 ± 0.3

4.3 ± 0.2

17

213 bar/50 °C/70 min

0.8 ± 0.1

2.8 ± 0.2

2.8 ± 0.1

1.6 ± 0.3

 

log red

2.1

2.0

0.8

2.7

  1. Mean values of 3 replicates ± standard deviation.
  2. est – estimate count (under detection limit).
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