Abstract：
:Biogas is the gaseous byproduct obtained during anaerobic digestion which is rich in methane, along with a significant amount of other gases like CO2. The removal of CO2 is essential to upgrade the biogas to biomethane (>95% methane content). High CO2 tolerant microalgae can be employed as a biological CO2 scrubbing agent for biogas upgrading. Many microalgal strains tolerant to the levels of CO2 and CH4 seen in biogas have been reported. A CO2 removal efficiency of 50-99% can be attained based on the microalgae used and the cultivation conditions applied. Nutrient-rich liquid digestate obtained from anaerobic digestion can also be used as the cultivation medium for microalgae, performing biogas upgrading and digestate bioremediation simultaneously. Mixotrophic cultivation enables microalgae to utilize the organic carbon present in the liquid digestate along with nitrogen and phosphorus. Microalgae appears to be a potential biological CO2 scrubbing agent for efficient biogas upgrading.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Nagarajan D,Lee DJ,Chang JSdoi
10.1016/j.biortech.2019.121804subject
Has Abstractpub_date
2019-10-01 00:00:00pages
121804eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31034-Xjournal_volume
290pub_type
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