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Avaliação técnico-económica da produção de Biodiesel e Lípidos a partir de Microalga marinha
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Resumo(s)
As alterações climáticas verificadas atualmente a nível mundial representam um problema, para o qual é necessário atuar. De modo a reduzir as emissões de dióxido de carbono, um dos principais Gases de Efeito de Estufa (GEE), novas fontes alternativas de energia têm sido procuradas. O biodiesel representa uma fonte de energia renovável, que pode ser usado como substituto ao diesel convencional. As microalgas oleaginosas são consideradas uma matéria-prima promissora para a produção de biodiesel e compostos w-3, muito procurados pelas indústrias alimentar e farmacêutica. A microalga marinha oleaginosa heterotrófica Chrypthecodinium cohnii produz quantidades significativas de lípidos com uma percentagem significativa do ácido docosahexaenóico (ADH), um ácido gordo w-3 poliinsaturado (AGPI) utilizado em formulações alimentares e farmacêuticas. A fração dos lípidos saturados e monoinsaturados desta microalga poderá ser utilizada para produção de biodiesel. Com este projeto pretende-se avaliar técnica e economicamente a produção de lípidos pela microalga marinha do projeto de investigação OMEGAFUEL, financiado pela FCT – Fundação para a Ciência e a Tecnologia, Chrypthecodinium cohnii, para obtenção de ácido docosahexaenóico (ADH) e biodiesel, num contexto de biorrefinaria. Foram avaliados cinco cenários distintos em condições de lucro e custo diferentes. Concluiu-se que, devido às limitações da análise, esta técnica de produção de lípidos e biodiesel a partir da microalga marinha apresenta ainda valores de VAL muito negativos mas, é de realçar que esta técnica encontra-se ainda numa fase muito inicial e apresenta potencial de melhoria e de se tornar um processo lucrativo.
Climate change currently occurring worldwide represents a problem that needs to be addressed. In order to reduce emissions of carbon dioxide, one of the main greenhouse gases (GHG), new alternative sources of energy have been sought. Biodiesel represents a renewable energy source, which can be used as a substitute for conventional diesel. Oilseed microalgae are considered a promising raw material for the production of biodiesel and polyunsaturated w- 3 compounds, which are highly sought after by the food and pharmaceutical industries. The heterotrophic oil microalgae Chrypthecodinium cohnii produces significant amounts of lipids with a significant percentage of docosahexaenoic acid (DHA), a polyunsaturated w-3 fatty acid (PUFA) used in food and pharmaceutical formulations. The fraction of saturated and monounsaturated lipids in this microalga can be used for the production of biodiesel in a context of biorefinery. This work intends to technically and economically evaluate the production of lipids by the marine microalgae of the OMEGAFUEL research project, funded by FCT - Foundation for Science and Technology, Chrypthecodinium cohnii, to obtain docosahexaenoic acid (DHA) and biodiesel, in a biorefinery context. It was concluded that, due to the limitations of the analysis, this technique of producing lipids and biodiesel from marine microalgae still presents very negative VAL values, but it should be noted that this technique is still at a very early stage and has potential to improve and become a profitable process.
Climate change currently occurring worldwide represents a problem that needs to be addressed. In order to reduce emissions of carbon dioxide, one of the main greenhouse gases (GHG), new alternative sources of energy have been sought. Biodiesel represents a renewable energy source, which can be used as a substitute for conventional diesel. Oilseed microalgae are considered a promising raw material for the production of biodiesel and polyunsaturated w- 3 compounds, which are highly sought after by the food and pharmaceutical industries. The heterotrophic oil microalgae Chrypthecodinium cohnii produces significant amounts of lipids with a significant percentage of docosahexaenoic acid (DHA), a polyunsaturated w-3 fatty acid (PUFA) used in food and pharmaceutical formulations. The fraction of saturated and monounsaturated lipids in this microalga can be used for the production of biodiesel in a context of biorefinery. This work intends to technically and economically evaluate the production of lipids by the marine microalgae of the OMEGAFUEL research project, funded by FCT - Foundation for Science and Technology, Chrypthecodinium cohnii, to obtain docosahexaenoic acid (DHA) and biodiesel, in a biorefinery context. It was concluded that, due to the limitations of the analysis, this technique of producing lipids and biodiesel from marine microalgae still presents very negative VAL values, but it should be noted that this technique is still at a very early stage and has potential to improve and become a profitable process.
Descrição
Tese Mestrado Mestrado Integrado em Engenharia da Energia e do Ambiente, 2021, Universidade de Lisboa, Faculdade de Ciências
Palavras-chave
Microalga Chrypthecodinium cohnii Biodiesel Ácido Docosahexaenóico (ADH) Valor Atual Líquido (VAL) Taxa Interna de Rentabilidade (TIR) Retorno do Investimento (ROI) Teses de mestrado - 2021