Unbalanced production of atmospheric CO(2) constitutes a major challenge to global sustainability. Technologies have thus been developed for enhanced biological carbon fixation (also referred to as CO(2) mitigation), and one of the most promising capitalizes on microalgae. However, the "best bioreactor", which would be able to achieve maximum productivity and maximum energy efficiency under a given set of operational costs, does not exist. This review briefly examines the current technologies available for enhanced microalgal CO(2) fixation, and specifically explores the possibility of coupling wastewater treatment with microalgal growth for eventual production of biofuels and/or added-value products, with an emphasis on productivity. In addition, an overview of reactor configurations for CO(2) fixation and bottlenecks associated with the underlying technology are provided. Finally, a review of life cycle analysis studies is presented, and routes for improvement of existing processes are suggested.
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http://dx.doi.org/10.1016/j.tibtech.2010.04.004 | DOI Listing |
Funct Integr Genomics
January 2025
The Energy and Resources Institute, Lodi Road, New Delhi, 110003, India.
The major limiting factor of photosynthesis in C3 plants is the enzyme, rubisco which inadequately distinguishes between carbon dioxide and oxygen. To overcome catalytic deficiencies of Rubisco, cyanobacteria utilize advanced protein microcompartments, called the carboxysomes which envelopes the enzymes, Rubisco and Carbonic Anhydrase (CA). These microcompartments facilitate the diffusion of bicarbonate ions which are converted to CO by CA, following in an increase in carbon flux near Rubisco boosting CO fixation process.
View Article and Find Full Text PDFNat Commun
January 2025
School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi, China.
Photosynthesis harvests solar energy to convert CO into chemicals, offering a potential solution to reduce atmospheric CO. However, integrating photosynthesis into non-photosynthetic microbes to utilize one-carbon substrates is challenging. Here, a photosynthesis system is reconstructed in E.
View Article and Find Full Text PDFAppl Environ Microbiol
December 2024
Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany.
Unlabelled: The rising atmospheric concentration of CO is a major concern to society due to its global warming potential. In soils, CO-fixing microorganisms are preventing some of the CO from entering the atmosphere. Yet, the controls of dark CO fixation are rarely studied .
View Article and Find Full Text PDFMacromol Rapid Commun
December 2024
Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
The CO-epoxide addition to cyclic carbonate is of great significance but usually requires high temperatures and CO pressures. Herein, a spirobifluorene-based porous organic polymer catalyst is designed with a Co-salen complex immobilized on the backbone (ST-CoSalen-POP) to enable CO fixation under mild conditions. ST-CoSalen-POP possesses a high Co-loading content (9.
View Article and Find Full Text PDFFEMS Microbiol Lett
December 2024
K.A. Timiryazev Institute of Plant Physiology of the Russian Academy of Sciences, Botanicheskaya St. 35, Moscow 127276, Russian Federation.
A new filamentous phototrophic bacterium Khr17 was isolated as an enrichment culture from the brackish polar lake Bol'shie Khruslomeny. The organism was a halotolerant, strictly anaerobic phototroph possessing photosystem II. Sulfide was required for phototrophic growth.
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