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Table 1 Renewable resources and the obtained concentration (C) of LA, the corresponding purity (P) and the bacteria (B) used, Lactococcuslactis (1), Streptococcus sp. (2), Lactobacillus coryniformis subsp. Torquens (3), Bacillus coagulans (4), a mixture of bacteria naturally present in sour whey (5), and the ensilage (6)

From: CE-UV/VIS and CE-MS for monitoring organic impurities during the downstream processing of fermentative-produced lactic acid from second-generation renewable feedstocks

#

Resource

B

LA

PGA

[−]

[−]

[−]

C [ppm]

P [%]

C [ppm]

1

Cracked Rye

1

713,000

79.0

3.700

2

Lucerne press juice

1

724,800

61.5

2.300

3

Tapioca starch

2

642,300

84.2

1.300

4

Dextrose

3

662,200

79.5

4.000

5

Sweet sorghum press juice

4

589,600

78.5

1.400

6

Pilsner malt

4

285,400

91.8

1.000

7

Sugar beet molasses

4

667,100

83.4

4.700

8

Straw hydrolysate.

4

726,900

75.4

4.200

9

Sugar cane molasses

4

621,100

84.9

2.600

10

Rape extraction meal

4

556,000

43.4

8.000

11

Whey

5

598,600

83.9

2.400

12

Silage juice

6

316,500

93.6

1.200

13

Sugar bread

4

728,200

85.5

2.400

14

Animal bone meal

4

718,400

88.3

0.3

15

Rape extraction meal and molasses

4

627,800

74.6

12.500

16

Purac 88 % w/w

-

669.800

71.2

0.0