Table 6 A comparison between Bacillus sp. strain SEE-3 and some BC producers in terms of BC production and optimum conditions.

Bacillus sp. strain SEE-3

Medium volume; 100 mL/250 mL conical flask, initial pH level of 5, incubation time; 14 days, inoculum size; 5%, v/v, peptone; 11.22 g/L, citric acid; 1.5 g/L; Cantaloupe juice; 81.27%, v/v, yeast extract; 5 g/L, temperature; 37 °C, Na₂HPO₄; 3 g/L

19.42

Current study

Komagataeibacter xylinus IITR DKH20

70% (v/v) pineapple peel waste, citric acid conc. 1.15 g/L; peptone conc. 5 g/L; 2.7 g Na₂HPO₄ and yeast extract concentration was 5 g/L, at a temperature of 28 ± 2 °C, pH 6 after 16 days

11.4

Khan et al.¹¹⁶

Komagataeibacter xylinus ATCC 700,178

1.26 g/L citric acid and 3.39 g/L Na₂HPO₄, 1.5% m/v recycled paper sludge hydrolysate, 1.45% m/v yeast extract/peptone, 1% v/v ethanol, pH 5.5 after 15 days of fermentation

5.69

Soares da Silva et al.¹²⁰

Lactobacillus hilgardii IITRKH159

g/L: 50 fructose, 5 yeast extract, 5 (NH₄)₂SO₄, 3 KH₂PO₄, 0.05 MgSO₄, pH 5.5 in a static condition at 28 ± 2 °C, after 16 days

7.23 ± 0.59

Khan et al.¹²¹

Komagataeibacter xylinus BPR 2001

% (m/v): citric acid 0.115, Na₂HPO₄ 0.27, (NH₄)₂SO₄ 0.63, CSL 1.91, molasses 5.38 and ethanol 1.38% (v/v), pH 5.5 after 9 days at 30 °C under static conditions

7.5 ± 0.54

Rodrigues et al.¹²²

Gluconacetobacter xylinus

3 g/L tea, 20 g/L mannitol and 40 g/L corn steep liquor after 7 days at 30 °C

3.34

Nguyen et al.¹²³

B. licheniformis strain ZBT2

HS medium supplemented with grape juice (5%, v/v), yeast extract (1.5% w/v) and peptone (1.5% w/v)

9.2

Bagewadi et al.¹²⁴

B. amyloliquefaciens ZF-7

%: 5 glucose, 0.5 peptone, 0.5 yeast extract, 0.5 Na₂HPO₄,0.1 citric acid, 1.4 ethanol, pH 6.5 in culture media inoculated with 1% (v/v) cells suspension at 30 °C for 5 days under static conditions

6.2

Zhu et al.¹²⁵

Leifsonia sp.

HS medium supplemented with maltose at 2% (w/v) and 5 mL/L of soy whey as nitrogen source, pH 6.5 at 30 °C after 7 days when the inoculum size is 10%

5.97

Rastogi and Banerjee¹²⁶

Rhodococcus sp. MI 2

SH medium containing 1.5% sucrose, 0.9% yeast extract, 0.7% peptone and 5% (v/v) inoculum at pH 3.5 and 25 °C under static conditions after14 days

7.4

Tanskul et al.¹²⁷