Abstract
Mixotrophy (M) assumes sum of autotrophic (A) and heterotrophic (H) growths. In this study, a novel split-mixotrophic cultivation strategy (SMCS) developed as better mixotrophy via offering mutual-benefits through gas-exchange at both headspaces while splitting both trophic modes. To quantify synergistic-growth effects in combined-autotrophy and combined-heterotrophy (CA&CH) of SMCS, gross O2-evolution, DIC and DO concentrations were compared with A, H and M. Average 12–14% and 26–32% increase in DIC and DO concentrations were determined respectively in CA and CH than A, H and M. Biomass yield in CA + CH was increased approx.1.5-folds higher than yields of A + H and M regimes. These results show SMCS as better cultivation strategy than the M by increased biomass and lipid yields. Challenges associated with organic carbon can be solved by SMCS viz. chlorophyll loss, organic carbon uptake inhibition. SMCS could be a breakthrough to integrate bacterial process with algae for better bioprocess economy and energy recovery.
Original language | English |
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Article number | 121820 |
Journal | Bioresource technology |
Volume | 291 |
DOIs | |
Publication status | Published - 2019 Nov |
Bibliographical note
Funding Information:The authors would like to acknowledge the support of the Korea CCS R&D Center (Korea CCS 2020 Project) funded by the Korea government ( Ministry of Science and ICT ) in 2017 (grant number: KCRC-2014M1A8A1049278 ) and National Research Foundation of Korea (NRF) funded by the Korea government (grant number: NRF-2019R1A2C3009821) and Korea Institute of Energy Technology Evaluation and Planning ( KETEP ) grant funded by the Korea government ( Ministry of Trade, Industry and Energy ) (grant number: 20172010202050 ).
Publisher Copyright:
© 2019 Elsevier Ltd
Keywords
- Energy
- Lipid
- Microalgae
- SMCS
- Split mixotrophy
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal