Application of an encapsulated filamentous fungus in solubilization of inorganic phosphate.
Spores of Aspergillus niger were encapsulated in agar, calcium alginate and k-carrageenan and further applied in citric acid production during six repeated batch cultivations. Rock phosphate (RP) at concentrations of 3 g l-1 and 7 g l-1 was supplemented to the culture medium to test encapsulated-fungus solubilizing capability. The highest average citric acid productivity of 0.15 g l-1 h-1 was reached with alginate-bead-encapsulated A. niger on RP-free culture medium while agar seemed to be the most suitable carrier on RP-supplemented medium. Accordingly, the highest average soluble P concentration of 0.20 g l-1 batch-1 was obtained with agar-cell beads as compared with other encapsulated systems.
Estacion Experimental del Zaidin, CSIC, Granada, Spain.
M
M
Vassileva
R
R
Azcon
J M
JM
Barea
N
N
Vassilev
D000362:Agar; D000464:Alginates; D001234:Aspergillus niger / Q000378:metabolism*; D002351:Carrageenan; D019343:Citric Acid / Q000378:metabolism; D004339:Drug Compounding / Q000379:methods; D005308:Fertilizers / Q000382:microbiology; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D010710:Phosphates / Q000378:metabolism*; D012995:Solubility
D000464:Alginates; D005308:Fertilizers; D006603:Hexuronic Acids; D010710:Phosphates; D019343:Citric Acid; D020723:Glucuronic Acid; D002351:Carrageenan; D000362:Agar