Effect of fermentation conditions on the production of citric acid from cheese whey by Aspergillus niger

World J Microbiol Biotechnol

Rabelo

Gonçalves

et al. 2007

The use of agriculture substrates in industrial biotechnological processes has been increasing because of its low cost. Cashew apples are considered an agriculture low cost product in the Brazilian Northeast because the cashew cultivation is done mainly to produce cashew nuts. About 90% of the cashew apples production is lost in the field after removing the nut. In this work, the use of clarified cashew apple juice as substrate for microbial cultivation was investigated. The results showed that cashew apple juice is a good source of reducing sugars and can be used to grow Leuconostoc mesenteroides to produce high added value products such as dextran, lactic acid, mannitol and oligosaccharides.

Section: Introductionmentioning

confidence: 99%

Fermentation of cashew apple juice to produce high added value products

World J Microbiol Biotechnol

Rabelo

Gonçalves

et al. 2007

“…Alternative substrates have been studied as low-cost substrates for microbial fermentation at the chemical, petrochemical, pharmaceutical and food industry to produce a wide variety of new materials and final products [4][5][6][7][8][9][10][11][12]. Agriculture residues are the most suitable low-cost substrates for microbial cultivation because they are a source of carbon, nitrogen and minerals.…”

Section: Introductionmentioning

confidence: 99%

Dextransucrase production using cashew apple juice as substrate: effect of phosphate and yeast extract addition

Chagas

Pinto

et al. 2007

Bioprocess Biosyst Eng

Cashew apples are considered agriculture excess in the Brazilian Northeast because cashew trees are cultivated primarily with the aim of cashew nut production. In this work, the use of cashew apple juice as a substrate for Leuconostoc mesenteroides cultivation was investigated. The effect of yeast extract and phosphate addition was evaluated using factorial planning tools. Both phosphate and yeast extract addition were significant factors for biomass growth, but had no significant effect on maximum enzyme activity. The enzyme activities found in cashew apple juice assays were at least 3.5 times higher than the activity found in the synthetic medium. Assays with pH control (pH = 6.5) were also carried out. The pH-controlled fermentation enhanced biomass growth, but decreased the enzyme activity. Crude enzyme free of cells produced using cashew apple juice was stable for 16 h at 30 degrees C at a pH of 5.0.

“…Alternative low cost substrates have been investigated for microbial fermentation to produce several products of interest of the chemical, petrochemical, pharmaceutical and food industry [9][10][11][12]. Agricultural residues and wastes are the most suitable low cost substrates for microbial cultivation.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of mannitol production using cashew apple juice as substrate

Fontes

Rabelo

et al. 2008

Bioprocess Biosyst Eng

The use of agriculture excess as substrate in industrial fermentations became an interesting alternative to reduce production costs and to reduce negative environmental impact caused by the disposal of these products. In this work, a kinetic study of mannitol production using cashew apple juice as substrate was studied. The carbohydrates of cashew apple juice are glucose and fructose. Sucrose addition favored the yield of mannitol (85%) at the expense of lower productivity. The best results were obtained applying only cashew apple juice as substrate, containing 50 g L(-1) of total reducing sugar (28 g L(-1) of fructose), yielding 18 g L(-1) of mannitol with 67% of fructose conversion into mannitol and productivity of 1.8 g L(-1) h(-1).