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Acid and enzymatic hydrolysis to recover reducing sugars from cassava bagasse: an economic study BABT
Woiciechowski,Adenise Lorenci; Nitsche,Saul; Pandey,Ashok; Soccol,Carlos Ricardo.
The objective of this work was to study the acid and enzymatic hydrolysis of cassava bagasse for the recovery of reducing sugars and to establish the operational costs. A statistical program "Statistica", based on the surface response was used to optimize the recovery of reducing sugars in both the processes. The process economics was determined considering the values of reducing sugars obtained at laboratory scale, and the operations costs of a cylindrical reactor of 1500 L, with flat walls at the top and bottom. The reactor was operated with 150 kg of cassava bagasse and 1350 kg of water. The yield of the acid hydrolysis was 62.4 g of reducing sugars from 100 g of cassava bagasse containing 66% starch. It represented 94.5% of reducing sugar recovery. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassava bagasse; Hydrolysis; Acid; Enzyme; Reducing sugars; Economics.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300018
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Exo-polygalacturonase production by Bacillus subtilis CM5 in solid state fermentation using cassava bagasse BJM
Swain,Manas R.; Kar,Shaktimay; Ray,Ramesh C..
The purpose of this investigation was to study the effect of Bacillus subtilis CM5 in solid state fermentation using cassava bagasse for production of Exo-polygalacturonase (exo-PG). Response surface methodology was used to evaluate the effect of four main variables, i.e. incubation period, initial medium pH, moisture holding capacity (MHC) and incubation temperature on enzyme production. A full factorial Central Composite Design was applied to study these main factors that affected exo-PG production. The experimental results showed that the optimum incubation period, pH, MHC and temperature were 6 days, 7.0, 70% and 50ºC, respectively for optimum exo-PG production.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exo-polygalacturonase; Bacillus subtilis CM5; Response surface methodology; Solid state fermentation; Cassava bagasse.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300028
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L(+)-Lactic acid recovery from cassava bagasse based fermented medium using anion exchange resins BABT
John,Rojan P.; Nampoothiri,K. Madhavan; Pandey,Ashok.
The properties of the ion exchange resins, Amberlite IRA 402, a strong anion exchange resin and IRA 67, a weak anion exchange resin were determined to evaluate their comparative suitability for lactic acid recovery from fermented cassava bagasse. Data on binding capacities and recovery proved that weak base resin in chloride form was the most favourable ones for lactic acid recovery from aqueous solutions and fermentation media. Fermented media obtained through simultaneous saccharification and fermentation of cassava bagasse starch hydrolysate based medium were used for lactic acid recovery study using weak base resin column. Amberlite IRA 67 had much more efficiency than Amberlite IRA 402 to recover lactic acid. Like in other reports, due to the presence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: L(+) lactic acid; Lactobacilli; Anion exchage resin; Cassava bagasse.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600020
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Relation between citric acid production by solid-state fermentation from cassava bagasse and respiration of Aspergillus niger LPB 21 in semi-pilot scale BABT
Prado,Flávera Camargo; Vandenberghe,Luciana Porto de Souza; Soccol,Carlos Ricardo.
The aim of this work was to study the relation between citric acid production and respiration of Aspergillus niger LPB 21 in solid-state fermentation of cassava bagasse. The experiments were carried out in horizontal drum bioreactor coupled with a gas chromatography system. Fermentation was conduced for 144 h with initial substrate moisture of 60% using heat-treated cassava bagasse as sole carbon source. The exhausted air from the bioreactor was analyzed for the monitoring of CO2 produced and O2 consumed in order to estimate the biomass biosynthesis by the fungal culture. The metabolic activity of A. niger growth was associated to citric acid production. The system using FERSOL software determined 4.372 g of biomass/g of consumed O2. Estimated and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citric acid; Solid-state fermentation; Cassava bagasse; Horizontal drum bioreactor; Fungus respiration.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400004
Registros recuperados: 4
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