Lactic acid fermentative production using waste from the harvest of green sugar cane as a substrate
Waste products from the harvest of green sugar cane (var. CC 85-92), were tested as a substrate in batch type fermentative production of lactic acid. The fermentations were carried out at 32°C, pH 6.0, with juice obtained from cane tops and leaves (JTL) and Lactococcus lactis subs lactis isolated from the same variety of cane. Lactic acid concentration (LA), substrate conversion (SC), biomass concentration, velocity of product formation (r p) and yield (Yp/s) were measured, and the results were compared with those of fermentations using the same strain in MRS culture medium, with 60g·l-1 of glucose. Lactic acid concentrations up to 28.5g·l-1 with a yield of 0.85g·g-1 were obtainedusing JTL medium in a 48h incubation period. JTL and MRS showed statistically significant differences in Yp/s, SC and biomass concentration, while JTL and MRS were not significantly different in LA and r p, suggesting that waste products from the sugar cane harvest could be used as a cheap raw material for the fermentative production of lactic acid.
| Principais autores: | , |
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| Formato: | Digital revista |
| Idioma: | English |
| Publicado em: |
ASOCIACIÓN INTERCIENCIA
2007
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| Acesso em linha: | http://ve.scielo.org/scielo.php?script=sci_arttext&pid=S0378-18442007000500009 |
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