Abstract
In a perspective projected to reduce the atmospheric concentration of greenhouse gases, in which carbon dioxide is the master, the use of microalgae is an effective and decisive response. The review describes the bio circularity of the process of abatement of carbon dioxide through biofixation in algal biomass, highlighting the potential of its reuse in the production of high value-added products.
Highlights
Greenhouse effect and decarbonisation strategies Earth's temperature is rising almost 0.15°- 0.20°C per decade since 1975, causing an increase of 1° C since 1880 [1,2]. Scientists believe that this trend cannot be explained uniquely by natural changes, but it has to consider the influence of other factors, first of all the effect of the anthropogenic emission of large quantities of greenhouse gases (GHGs)
Since CO2 is one of those gases with exceptional persistence in the atmosphere [5], transported by the wind and spreading all over the world, it can be responsible for global warming virtually irreversible for more than 1,000 years
Effect of flue gas compounds on microalgae In order to apply the biofixation of microalgae to industrial power plants or fuel gases it is necessary to understand the influence of combustion gas compounds on microalgae (Tab. 1)
Summary
Greenhouse effect and decarbonisation strategies Earth's temperature is rising almost 0.15°- 0.20°C per decade since 1975, causing an increase of 1° C since 1880 [1,2]. The main advantages of horizontal PBRs are the large surface exposed to light and the relatively low CO2 losses [31]; on the other hand, an important disadvantage is the accumulation of oxygen in the culture medium, that can lead to a decrease in biomass production and CO2 uptake [29].
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