Comprehensive approach to improving life-cycle CO2 reduction efficiency of microalgal biorefineries: A review

Hong Il Choi, Sung Won Hwang, Sang Jun Sim

Research output: Contribution to journalReview articlepeer-review

36 Citations (Scopus)

Abstract

Along with the increase in global awareness of rising CO2 levels, microalgae have attracted considerable interest as a promising CO2 reduction platforms since they exhibit outstanding biomass productivity and are capable of producing numerous valuable products. At this moment, however, two major barriers, relatively low photosynthetic CO2 fixation efficiency and necessity of carbon-intensive microalgal process, obstruct them to be practically utilized. This review suggests effective approaches to improve life-cycle CO2 reduction of microalgal biorefinery. In order to enhance photosynthetic CO2 fixation, strategies to augment carbon content and to increase biomass productivity should be considered. For reducing CO2 emissions associated with the process operations, introduction of efficient process elements, designing of energy-saving process routes, reuse of waste resources and utilization of process integration can be noteworthy options. These comprehensive strategies will provide guidance for microalgal biorefineries to become a practical CO2 reduction technology in near future.

Original languageEnglish
Article number121879
JournalBioresource technology
Volume291
DOIs
Publication statusPublished - 2019 Nov

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support of the Korea CCS R&D Center (Korea CCS 2020 Project) which was funded by the Korea Government (the Ministry of Science and ICT) in 2019 (No. KCRC - 2014M1A8A1049278 ), the National Research Foundation of Korea (NRF) (No. NRF-2019R1A2C3009821) and the Korea Institute of Energy Technology Evaluation and Planning (KETEP), which was funded by the Korea Government (the Ministry of Trade, Industry and Energy ) (No. 20172010202050 ).

Funding Information:
The authors gratefully acknowledge the support of the Korea CCS R&D Center (Korea CCS 2020 Project) which was funded by the Korea Government (the Ministry of Science and ICT) in 2019 (No. KCRC-2014M1A8A1049278), the National Research Foundation of Korea (NRF) (No. NRF-2019R1A2C3009821) and the Korea Institute of Energy Technology Evaluation and Planning (KETEP), which was funded by the Korea Government (the Ministry of Trade, Industry and Energy) (No. 20172010202050).

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Biorefinery
  • Life-cycle CO reduction
  • Microalgae
  • Negative emissions

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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