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Citric acid production by aspergillus niger in solid state fermentation of agricultural waste and surplus



Citric acid production by aspergillus niger in solid state fermentation of agricultural waste and surplus



Annali della Facolta di Agraria Universita degli Studi di Perugia 42: 243-254



Some raw substrates have been used to produce citric acid in solid state fermentation (orange peel, tapioca, potatoes, olive husk, beet pulps, tobacco and topinambur fibre, grape stalks). The highest production (46 g/Kg) was found on lyophilized orange peel powder (LOPP) substrates containing the highest soluble carbohydrate values. Different results were obtained on substrates supplemented with either beet molasses or grape must as C source, (the latter was useful in improving citric acid production). During fermentation on LOPP, maximum productivity (0.92 g/Kg/h) was observed between 72 and 96 h. Citric acid production was also improved by adding glycerol to the substrate, under tray-fermentation conditions.

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Accession: 007117058

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