Carbon Dioxide Fixation using Microalgal Systems

Microalgal CO2 fixation capacity is 10–50 times higher than terrestrial plants
therefore WOOFAA adopted the algal tech for ambient air revitalization
Microalgae Photobioreactor for Civil IAQ Deployment

Bio-mitigation of carbon dioxide using microalgal systems: Advances and perspectives

Wenguang Zhou (a,b), Jinghan Wang (c,e), Paul Chen (c), Chengcheng Ji (a), Qiuyun Kang (a), Bei Lu (a), Kun Li (a), Jin Liu (d), Roger Ruan (b,c)
Renewable and Sustainable Energy Reviews 76 (2017) 1163–1175

a. School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang, University, Nanchang, China
b. MOE Biomass Engineering Research Center, Nanchang University, Nanchang, China
c. Center for Biorefining, Bioproducts and Biosystems Engineering Department, University of Minnesota, 1390 Eckles Ave., Saint Paul, MN 55108, USA
d. Institute for Food and Bioresource Engineering and Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, China
e. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, China

ABSTRACT

Carbon sequestration is an important strategy in combating rising carbon dioxide concentration in the atmosphere. Differing from carbon emission reduction, carbon sequestration offers the possibilities of reducing or avoiding CO2 emission if CO2 is to be captured from large stationary sources and utilization of the captured CO2 for production of chemical and energy.

Biological sequestration or bio-mitigation of carbons through microalgal systems, despite in its early stage, represents a promising and sustainable alternative to current carbon mitigation methods.

Microalgae consist of a group of highly diverse and fast-growing microorganisms, capable of photoautotrophy, heterotrophy, and mixotrophy. They can be cultivated on non-fertile land with unit CO2 fixation capacity 10–50 times higher than terrestrial plants. Production of food, feed, fine chemicals, and biofuels from microalgal biomass could further enhance the benefits of microalgae-based CO2 fixation.

This present review is aimed to gain understanding how microalgae assimilate different forms of carbons and provide a comprehensive overview of the current advances in utilizing microalgae for CO2 fixation, with focus on strain screening and improvement, mass cultivation practice, and effects of environmental and nutritional factors on CO2 fixation performance. Economic viability, challenges and perspectives of microalgae-mediated CO2 biomitigation are also discussed.

CO2 fixation using Microalgal Systems

Conclusion

Research reported in the literature has demonstrated that many microalgae strains are capable of assimilating inorganic and organic carbons from concentrated and non-point sources. Many of the current microalgae cultivation operations can be adopted for applications tailored to carbon sequestration.
Microalgal Photosynthetic Photobioreactor