Summary
Penicillium variabile P16 immobilized on polyurethane sponge produced gluconic acid in presence of rock phosphate, the latter being simultaneously solubilized during five repeated batches. A total production of 42, 60, and 90 g gluconic acid/l was obtained for 3, 7, and 14 g rock phosphate/l, respectively. Accordingly, soluble phosphorus concentration increased with gluconic acid production, reaching a maximum of 350 mg/l at the 3d batch in medium supplemented with 14 g rock phosphate/l.
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Vassilev, N., Fenice, M. & Federici, F. Rock phosphate solubilization with gluconic acid produced by immobilized Penicillium variabile P16. Biotechnol Tech 10, 585–588 (1996). https://doi.org/10.1007/BF00157366
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DOI: https://doi.org/10.1007/BF00157366