Skip to main content
. 2020 Feb 21;48(2):122–132. doi: 10.1080/12298093.2020.1726854

Table 2.

Effect of nitrogen sources on citric acid production by Candida tropicalis (F value= 107.536.) and Pichia kluyveri (F value = 44.401).

Nitrogen sources Yeast isolates
Candida tropicalis
Pichia kluyveri
Citric acid (g/L) Biomass (g/L) Glucose consumed (%) Citric acid (g/L) Biomass (g/L) Glucose consumed (%)
Diammonium hydrogen phosphate 40.90 ± 0.73 8.90 ± 0.79 82.96 ± 0.90 23.10 ± 0.92 9.36 ± 0.48 66.03 ± 0.58
Ammonium dihydrogen phosphate 30.60 ± 0.78 5.40 ± 0.51 65.60 ± 0.45 11.33 ± 0.98 8.36 ± 0.35 60.83 ± 0.99
Ammonium chloride 50.53 ± 0.83 11.40 ± 0.62 94.54 ± 0.92 26.56 ± 0.43 10.90 ± 0.37 71.50 ± 0.56
Ammonium ferrous sulfate 24.40 ± 0.72 6.43 ± 0.56 45.46 ± 0.64 14.66 ± 0.49 7.30 ± 0.52 30.43 ± 0.75
Urea 21.83 ± 0.58 3.43 ± 0.35 36.23 ± 0.84 8.43 ± 0.43 4.26 ± 0.17 22.10 ± 0.80
Ammonium phosphate monobasic 37.13 ± 0.72 9.16 ± 0.43 62.33 ± 0.99 17.36 ± 0.35 6.30 ± 0.47 37.16 ± 0.89
Ammonium sulfate 41.52 ± 0.46 10.53 ± 0.76 88.90 ± 0.46 35.40 ± 0.46 11.46 ± 0.40 81.56 ± 0.10

Mean ± standard error (n = 3) were presented.