Utilization of molasses and sugar cane bagasse for production of fungal invertase in solid state fermentation using Aspergillus niger GH1
Braz. j. microbiol
;
45(2): 373-377, Apr.-June 2014. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-723091
ABSTRACT
Agro-industrial wastes have been used as substrate-support in solid state fermentation for enzyme production. Molasses and sugarcane bagasse are by-products of sugar industry and can be employed as substrates for invertase production. Invertase is an important enzyme for sweeteners development. In this study, a xerophilic fungus Aspergillus niger GH1 isolated of the Mexican semi-desert, previously reported as an invertase over-producer strain was used. Molasses from Mexico and Cuba were chemically analyzed (total and reducer sugars, nitrogen and phosphorous contents); the last one was selected based on chemical composition. Fermentations were performed using virgin and hydrolyzate bagasse (treatment with concentrated sulfuric acid). Results indicated that, the enzymatic yield (5231 U/L) is higher than those reported by other A. niger strains under solid state fermentation, using hydrolyzate bagasse. The acid hydrolysis promotes availability of fermentable sugars. In addition, maximum invertase activity was detected at 24 h using low substrate concentration, which may reduce production costs. This study presents an alternative method for invertase production using a xerophilic fungus isolated from Mexican semi-desert and inexpensive substrates (molasses and sugarcane bagasse).
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Aspergillus niger
/
Resíduos
/
Melaço
/
Saccharum
/
Beta-Frutofuranosidase
País/Região como assunto:
Caribe
/
Cuba
/
México
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2014
Tipo de documento:
Artigo
País de afiliação:
México
Instituição/País de afiliação:
Universidad Autónoma de Coahuila/MX
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