18 documents found, page 1 of 2
Carbon footprint assessment of microalgal biomass production, hydrothermal liqu...
Pires, Renata; Silva, Tiago; Ribeiro, Cláudia; Costa, Luis; Matos, Cristina T.; Costa, Paula; Lopes, Tiago; Gírio, Francisco; Silva, CarlaABSTRACT: Industrial liquid effluents (e.g., from fertilizer industry) and flue gas streams (e.g., CO2-rich, from cement industry) arise as an opportunity for waste valorization. Microalgae are suitable biomass for assimilating both effluents at the cultivation stage. Under a biorefinery concept, given the urge for energy transition in the aviation sector, this research explores the transformation of a microalg...
Carbon footprint assessment of microalgal biomass production, hydrothermal liqu...
Pires, Renata; Silva, Tiago; Ribeiro, Cláudia; Costa, Luis; Matos, Cristina T.; Costa, Paula; Lopes, Tiago; Gírio, Francisco; Silva, CarlaABSTRACT: Industrial liquid effluents (e.g., from fertilizer industry) and flue gas streams (e.g., CO2-rich, from cement industry) arise as an opportunity for waste valorization. Microalgae are suitable biomass for assimilating both effluents at the cultivation stage. Under a biorefinery concept, given the urge for energy transition in the aviation sector, this research explores the transformation of a microalg...
Conceptual Design of an Autotrophic Multi-Strain Microalgae-Based Biorefinery: ...
Lopes, Tiago; Ortigueira, Joana; Matos, Cristina T.; Costa, Luis; Ribeiro, Cláudia; Reis, Alberto; Gírio, FranciscoABSTRACT: Microalgae represent a promising solution in addressing the impacts associated with the current agricultural and manufacturing practices which are causing irreparable environmental damage. Microalgae have considerable biosynthetic potential, being a rich source of lipids, proteins, and high-value compounds. Under the scope of the H2020-BBI MULTI-STR3AM project, an innovative large-scale production sys...
Membrane separation and characterisation of lignin and its derived products obt...
Moniz, Patricia; Serralheiro, Cláudia; Matos, Cristina T.; Boeriu, Carmen G.; Frissen, Augustinus E.; Duarte, Luís C.; Roseiro, Luisa B.ABSTRACT: An organosolv process using ethanol-water was optimized in order to recover high quality lignin from rice-straw previously pre-treated by autohydrolysis at 210 °C. The results showed a selective and appreciable removal of lignin under very mild conditions and the highest delignification yield occurred at 30 °C. The lignin extracts were characterised using capillary zone electrophoresis (CZE), size exc...
Life cycle assessment of advanced bioethanol production from pulp and paper sludge
Sebastião, Diogo; Gonçalves, Margarida S.; Marques, Susana; Fonseca, César; Gírio, Francisco; Oliveira, Ana Cristina; Matos, Cristina T.This work evaluates the environmental performance of using pulp and paper sludge as feedstock for the production of second generation ethanol. An ethanol plant for converting 5400 tons of dry sludge/year was modelled and evaluated using a cradle-to-gate life cycle assessment approach. The sludge is a burden for pulp and paper mills that is mainly disposed in landfilling. The studied system allows for the valori...
Chemical and biological-based isoprene production: Green metrics
Morais, Ana Rita C.; Dworakowska, Sylwia; Reis, Alberto; Gouveia, Luisa; Matos, Cristina T.; Bogdal, Dariusz; Lukasik, Rafal M.Green metrics is a methodology which allows the greenness of either new or already existing processesto be assessed. This paper is a part of a special issue devoted to green metrics in which this methodologyis applied to different processes to assess bio and petrochemical routes. In this work, green metrics wereused as a tool to validate and compare the petrochemical and biological processes of isoprene product...
Life-cycle assessment of microalgae biodiesel: a review
Figueiredo, Filipa; Garcia, Rita; Gonçalves, Margarida S.; Castanheira, Érica; Malça, João; Oliveira, Ana Cristina; Matos, Cristina T.; Freire, FaustoMicroalgae are an attractive way to produce biofuels due to the ability to accumulate lipids and very high photosynthetic yields. This article presents a review of life-cycle assessment studies of microalgae biodiesel production, including an analysis of modeling choices and assumptions. A high variation in GHG emissions (between -0.75 and 2.9 kg CO2eq MJ-1) was found and the main causes were investigated, name...
Effect of light on the production of bioelectricity and added-value microalgae ...
Gouveia, Luisa; Neves, Carole; Sebastião, Diogo; Nobre, B. P.; Matos, Cristina T.This study demonstrates the simultaneous production of bioelectricity and added-value pigments in a Photosynthetic Alga Microbial Fuel Cell (PAMFC). A PAMFC was operated using Chlorella vulgaris in the cathode compartment and a bacterial consortium in the anode. The system was studied at two different light intensities and the maximum power produced was 62.7 mW/m2 with a light intensity of 96 lE/(m2 s). The res...
Nannochloropsis sp. biomass recovery by Electro-Coagulation for biodiesel and p...
Matos, Cristina T.; Santos, Marta; Nobre, B. P.; Gouveia, LuisaBiofuel production from microalgal biomass could be an alternative solution to conventional biofuels typically dependent on food and high land/water demanding crops. However, the economic and energetic viability of microalgal biofuels is limited by their harvesting processes. The finding of innovative, low cost and efficient harvesting method(s) is imperative. In this study, the Electro-Coagulation (EC) was stu...
Green metrics evaluation of isoprene production by microalgae and bacteria
Matos, Cristina T.; Gouveia, Luisa; Morais, Ana Rita C.; Reis, Alberto; Lukasik, Rafal M.Isoprene is a key intermediate compound for the production of synthetic rubber and adhesives and is also used as a building block in the chemical industry. Traditionally, isoprene is obtained from crude oil during the refinery process. Nevertheless, plants and animals are also able to synthesize this important compound. This work compares two renewable approaches for isoprene production: by photosynthetic organ...