The potential for production of chemicals from microalgal biomass has been considered as an alternative route for CO2 mitigation and establishment of biorefineries. This study presents the development of consolidated bioprocessing for succinate production from microalgal biomass using engineered Corynebacterium glutamicum. Starch-degrading and succinate-producing C. glutamicum strains produced succinate (0.16g succinate/g total carbon source) from a mixture of starch and glucose as a model microalgal biomass. Subsequently, the engineered C. glutamicum strains were able to produce succinate (0.28 g succinate/g of total sugars including starch) from pretreated microalgal biomass of CO2 -grown Chlamydomonas reinhardtii. For the first time, this work shows succinate production from CO2 via sequential fermentations of CO2 -grown microalgae and engineered C. glutamicum. Therefore, consolidated bioprocessing based on microalgal biomass could be useful to promote variety of biorefineries.
Bibliographical noteFunding Information:
Authors thank Dr. Kyoungseon Min and Mr. Min Eui Hong for technical support. This work was supported by Korea CCS R&D Center (KCRC) (no. 2014M1A8A1049277) and by the National Research Foundation of Korea grant-funded by the Korean Government (Ministry of Science, ICT & Future Planning) (2014, University-Institute cooperation program).
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