Solid state fermentation for production of microbial cellulases: Recent advances and improvement strategies

  • Behera S
  • Ray R
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Lignocellulose is the most plentiful non-food biomass and one of the most inexhaustible renewable resources on the planet, which is an alternative sustainable energy source for the production of second generation biofuels. Lignocelluloses are composed of cellulose, hemicellulose and lignin, in which the sugar polymers account for a large portion of the biomass. Cellulases belong to the glycoside hydrolase family and catalyze the hydrolysis of glyosidic linkages depolymerizing cellulose to fermentable sugars. They are multi-enzymatic complex proteins and require the synergistic action of three key enzymes: endoglucanase (E.C., exoglucanase (E.C. (E.C. and β-glucosidase (E.C. for the depolymerization of cellulose to glucose. Solid state fermentation, which holds growth of microorganisms on moist solid substrates in the absence of free flowing water, has gained considerable attention of late due its several advantages over submerged fermentation. The review summarizes the critical analysis of recent literature covering production of cellulase in solid state fermentation using advance technologies such as consolidated bioprocessing, metabolic engineering and strain improvement, and circumscribes the strategies to improve the enzyme yield.

Author-supplied keywords

  • Bioreactor design
  • Cellulase
  • Consolidated bioprocessing
  • Gene expressing system
  • Solid state fermentation
  • Strain improvement

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  • Sudhanshu S. Behera

  • Ramesh C. Ray

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