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A novel structured bioreactor for solid-state fermentation

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Abstract

A novel patented solid-state bioreactor (251 L) with honeycomb loading device was designed and its performance was tested. First, this apparatus gave a 66.87 % of calculated loading coefficient (volume ratio), which was almost twofold compared with conventional fermenters. Next, considering the crucial effect of heat transfer on bed loading and microbial growth, the performance was validated by temperature variance during fermentation and spore viability of Bacillus cereus DM423. Air pressure pulsation or external water jacket was used to control temperature; the maximal temperature variation was 7.7 versus 19.8 °C, respectively during fermentation. The difference was mainly due to the continuous gas phase characterized by solid-state fermentation (SSF). The average living spores of (1.50 ± 0.07) × 1011 cfu/g at 40 h obtained from the device was higher than (0.70 ± 0.03) × 1011 cfu/g from flask at 48 h. The results indicated that this new loading bioreactor with air pressure pulsation could be a good prospect for industrialization of SSF employing bacterial cultures.

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Acknowledgments

Financial support to this study was provided by the National Basic Research Program of China (973 Project, No. 2011CB707401), the National High Technology Research and Development Program of China (863 Program, SS2012AA022502), and the National Key Project of Scientific and Technical Supporting Program of China (No. 2011BAD22B02).

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Authors and Affiliations

  1. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, People’s Republic of China

    Hongzhang Chen & Qin He

  2. Graduate University of Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China

    Qin He

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  1. Hongzhang Chen
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  2. Qin He
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Correspondence to Hongzhang Chen.

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Chen, H., He, Q. A novel structured bioreactor for solid-state fermentation. Bioprocess Biosyst Eng 36, 223–230 (2013). https://doi.org/10.1007/s00449-012-0778-1

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