Avaliação proteica e lipídica da microalga Desmodesmus sp. Cultivada em meio de cultura ASM-1

Abstract

Algae are organisms with a wide diversity of forms, functions and strategies of survival, are photosynthetic organisms that range from isolated or aggregated single-celled organisms. The major role of microalgae relates to photosynthesis producing atmospheric oxygen. Some gases such as CO2 SO2 and NO, which aggravate the greenhouse effect, microalgae have the ability to capture these harmful gases and assimilate into their metabolism by converting them into fatty acids. The objective of this work was to structure microalgae cultivation at the UFFS Campus Laranjeiras do Sul, to monitor the development and maintenance and to evaluate the lipid and protein composition of the microalgae Desmodesmus sp. Thus, from an established microalgae culture, other works may give when it comes to live food or even using it in inert form. The system underwent some modifications and adjustments to obtain a minimum structure of culture, special lamps were necessary to activate the photosystem of the microalgae and thus to occur the proliferation of the same ones, that was accompanied with counting in chamber of Neubauer, for evaluation of the proteins were made by the Kjeldahl method, with a production average of 49.3295%. For the lipid values were analyzed as described with Bligh-Dyer (1959) with an average result of 13.57%. The results of the gas chromatography showed 11 elements produced by the microalgae that are of great interest where the main ones are the palmitic acid, with the greatest abundance in the sample, fatty acids linolenic and linoleic of omegas 3, and 6 respectively. This is one of the first studies with the cultivation of microalgae which shows more studies and adjustments in the system to produce a greater amount of protein or lipids.