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Utilisation of fruits waste for citric acid production by solid state fermentation
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DOI：10.1016/S0032-9592(02)00253-4.png)
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Abstract
En 中文
A solid state fermentation method was used to utilise pineapple, mixed fruit and maosmi waste as substrates for citric acid production using Aspergillus niger DS 1. Experiments were carried out in the presence and absence of methanol at different moisture levels. In the absence of methanol the maximum citric acid was obtained at 60% moisture level whereas in the presence of methanol the maximum citric acid was obtained at 70% moisture level. The stimulating effect of methanol was less at lower moisture level. The inhibitory effect of metal ions was also not observed and maximum citric acid yield of 51.4, 46.5 and 50% (based on sugar consumed) was obtained from pineapple, mixed fruit and maosmi residues, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.
Keywords:
solid state fermentation
citric acid
fruits waste
Aspergillus niger
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