Solid-state fermentation as a potential technique for esterase/lipase production by halophilic archaea.

Area of Science:

• Extremophile biology
• Biotechnology
• Microbial cultivation

Background:

• Halophilic archaea are extremophiles thriving in high-salt conditions.
• They possess significant biotechnological potential for producing enzymes, lipids, and pigments.
• Optimizing cultivation methods is crucial for harnessing this potential.

Purpose of the Study:

• To investigate the efficacy of solid-state fermentation (SSF) for biomass and esterase production using halophilic archaea.
• To evaluate the performance of different inert supports in SSF.
• To compare SSF with submerged fermentation (SmF) for halophilic archaea cultivation.

Main Methods:

• Four inert supports (perlite, vermiculite, polyurethane foam, glass fiber) were tested for SSF of Natronococcus sp. TC6.
• A mixture of polyurethane and glass fiber was identified as an optimal support.
• Three halophilic archaea species were cultured using both SSF and SmF.

Main Results:

• SSF, particularly with a polyurethane and glass fiber mixture, significantly enhanced biomass and esterase production compared to other supports.
• SSF improved biomass and esterase yields by 1.3- to 6.2-fold compared to SmF across three species.
• Glass fiber provided cell adhesion, while polyurethane acted as a reservoir, contributing to optimal growth.

Conclusions:

• Solid-state fermentation is a highly effective method for cultivating halophilic archaea for biomass and esterase production.
• The combination of polyurethane and glass fiber as a support material optimizes SSF conditions for these microorganisms.
• This study pioneers the use of SSF for haloarchaea cultivation, highlighting its biotechnological advantages.