Improving CO2 fixation efficiency by optimizing Chlorella PY-ZU1 culture conditions in sequential bioreactors
Abstract
To fix CO2 emissions efficiently from flue gas of coal-fired power plants, the culture medium, light intensity and bioreactors were comprehensively optimized in the process of CO2 fixation by Chlorella PY-ZU1. To make up for relative insufficiency of nutrients (except for the carbon source) resulting from continuous bubbling of 15% CO2, three chemicals were added into the culture to optimize the molar ratios of nitrogen to carbon, phosphorus to carbon, and magnesium to carbon in culture from 0.17 to 0.69, from 0.093 to 0.096, and from 0.018 to 0.030, respectively. Such adjustments led to a 1.25-fold increase in biomass (from 2.41 to 5.42 g L(-1)). By enhancing light intensity from 4500 to 6000 lux, the peak growth rate of Chlorella PY-ZU1 increased by 99% and reached to 0.95 g L(-1) day(-1). Use of a multi-stage sequential bioreactor notably improved the peak CO2 fixation efficiency to 85.6%.
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Algal photobioreactor carbon fixation efficiency is being improved by generating mutants using gamma irradiation and optimizing growth conditions such as nitrogen, phosphorus, and magnesium levels.
“Algal (e.g., Chlorella) photobioreactor carbon fixation efficiency is currently being improved by generating various mutants using gamma irradiation and optimizing growth conditions such as nitrogen, phosphorus, and magnesium levels [95,96].”
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“, Chlorella) photobioreactor carbon fixation efficiency is currently being improved by generating various mutants using gamma irradiation and optimizing growth conditions such as nitrogen, phosphorus, and magnesium levels [95,96].”
Background
- Authors
- Cheng, J., Huang, Y., Feng, J., Sun, J., Zhou, J., & Cen, K.
- Affiliations
- State Key Laboratory of Clean Energy Utilization (CN)
- Corresponding author
- Cheng, Jun
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2013-09
- Volume
- 144
- Pages
- 321-327
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2000848305
- Cited by
- 142
- References
- 30
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 8 · 2023: 13 · 2022: 12 · 2021: 12 · 2020: 10 · 2019: 19 · 2018: 10 · 2017: 17 · 2016: 11 · 2015: 12 · 2014: 7
- FWCI
- 3.63
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (51176163)
- International Sci. & Tech. Cooperation Program of China (2012DFG61770, 2010DFA72730)
- National High Technology R&D Program of China (2012AA050101)
- National Key Technology R&D Program of China (2011BAD14B02)
- Specialized Research Fund for the Doctoral Program of Higher Education (20110101110021)
- Program for New Century Excellent Talents in University (NCET-11-0446)
- Key Natural Science Foundation of Zhejiang Province (Z1090532)
- Science and Technology Project of Guangxi Province (1346011-1)
- Program of Introducing Talents of Discipline to University (B08026)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
- Keywords
- CO2 fixation, flue gas, coal-fired power plant emissions, culture medium optimization, nitrogen to carbon ratio, light intensity, microalgal biomass, CO2 capture
- MeSH terms
- Carbon Dioxide, Chlorella, Chlorophyll, Culture Media, Light, Magnesium, Nitrates, Phosphates, Time Factors, Biomass, Cell Culture Techniques, Bioreactors
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