BIOFIXATION OF CO2 BY MICROALGA Monoraphidium sp.

Abstract

Microalgae are unicellular organisms capable of photosynthesis, turning sunlight and carbon dioxide (CO2) into rich biomass. Precisely because of this definition, in recent years various sectors have been targeting their ability to reduce CO2 emissions and the capacity of simultaneously synthesize biomass which can be later used to produce bio-fuels. Besides being considered fast-growth microorganisms, microalgae have a diverse biochemical composition with similar characteristics to traditional biomass. In this context, the present work aimed to evaluate the biofixation of CO2 by the microalgae Monoraphidium sp., cultivated in a closed-window type photobioreactor, as well as characterization of microalgal biomass produced in relation to the total lipid content (TL), lipids converted into biodiesel (LCB), carbohydrates and proteins. The results achieved showed that the best result was obtained after 24 hours of cultivation, where for each gram of biomass produced approximately 1,2g of CO2 were consumed. The biomass Monoraphidium sp. produced had a content of lipids converted into biodiesel of approximately 8.36 ± 2.69%, carbohydrates 32% ± 3.37 and proteins 34.26% ± 0.41.