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[The solid-state fermentation with double dynamic of gas phase for celluloses].
Fujian Xu1, Hongzhang Chen, Zuohu Li
1State Key Lab. Biochem. Eng., Inst. Process. Eng., CAS, Beijing 100080, China.
Huan Jing Ke Xue= Huanjing Kexue
|July 31, 2002
Summary
Air-pulsating fermentation significantly enhances cellulose production and microbial growth. This method reduces fermentation time by one-third and doubles enzyme activity compared to static fermentation, paving the way for large-scale cellulose production.
Area of Science:
- Biotechnology
- Microbial Fermentation
- Enzyme Production
Context:
- Solid-state fermentation (SSF) offers advantages for cellulose production but faces challenges in controlling fermentation conditions.
- Optimizing gas phase dynamics is crucial for improving efficiency and yield in SSF processes.
Purpose:
- To investigate the efficacy of a novel double dynamic gas phase system for solid-state fermentation.
- To enhance cellulose production and microbial growth using air-pulsating fermentation.
Summary:
- The study optimized air pulsation parameters (range, period, internal circulation) for precise temperature control (max difference 0.12°C/cm at 9.0 cm bed height) and suitable water activity for fungal growth on steam-exploded straw.
- Environmental Scanning Electron Microscopy (ESEM) confirmed that air-pulsating fermentation promotes superior microorganism growth and cellulose production compared to static fermentation.
- Air-pulsating fermentation achieved a 1/3 shorter fermentation period (60 h vs. 84 h) and a nearly doubled filter paper enzyme activity (20.36 IU/mg vs. 10.82 IU/mg).
Impact:
- This double dynamic gas phase approach provides a robust foundation for the large-scale industrial production of cellulose.
- The enhanced enzyme activity and reduced fermentation time offer significant economic and efficiency benefits for biotechnological applications.