79 documents found, page 1 of 8
Microwave-assisted hydrothermal processing of pine nut shells for oligosacchari...
Torrado, Ivone; Neves, Beatriz Guapo; Fernandes, M. C.; Carvalheiro, Florbela; Pereira, Helena; Duarte, Luís C.ABSTRACT: Pine nut shells, a biomass residue from the Mediterranean Pinus pinea pine nut industrial processing, were treated by microwave-assisted autohydrolysis to produce xylo-oligosaccharides. Microwave-assisted processes provide alternative heating that may reduce energy input and increase overall process efficiency. The autohydrolysis treatments were performed under isothermal and non-isothermal operations...
Evaluation of different fractionation methods for the simultaneous protein and ...
Martins, Pedro L.; Duarte, Luís C.; Pereira, Helena; Reis, Alberto; Carvalheiro, FlorbelaABSTRACT: The production of high-value products from microalgae, one of the preferred emerging biorefineries' feedstocks, relies on the crucial step of biomass fractionation. In this work, the fractionation of Chlorella vulgaris and Scenedesmus obliquus biomass was tested for protein extraction using a wide range of physical, chemical, and enzymatic treatment combinations, including ultrasound, cell homogenizer...
Microwave-assisted hydrothermal processing of pine nut shells for oligosacchari...
Torrado, Ivone; Neves, Beatriz Guapo; Fernandes, Maria da Conceição; Carvalheiro, Florbela; Pereira, Helena; Duarte, Luís C.Pine nut shells, a biomass residue from the Mediterranean Pinus pinea pine nut industrial processing, were treated by microwave- assisted autohydrolysis to produce xylo-oligosaccharides. Microwave-assisted processes provide alternative heating that may reduce energy input and increase overall process efficiency. The autohydrolysis treatments were performed under isothermal and non-isothermal operations within a...
Evaluation of different fractionation methods for the simultaneous protein and ...
Martins, Pedro L.; Duarte, Luís C.; Pereira, Helena; Reis, Alberto; Carvalheiro, FlorbelaThe production of high-value products from microalgae, one of the preferred emerging biorefineries’ feedstocks, relies on the crucial step of biomass fractionation. In this work, the fractionation of Chlorella vulgaris and Scenedesmus obliquus biomass was tested for protein extraction using a wide range of physical, chemical, and enzymatic treatment combinations, including ultrasound, cell homogenizer, cellulas...
Lignin utilization for the removal of microplastic particles from water
Găgeanu, Iuliana; Carvalheiro, Florbela; Ekielski, Adam; Duarte, Luís C.ABSTRACT: The focus of the research was to evaluate the use of lignin from different sources as an agent for the removal of diverse types of microplastics when present in wastewater. Organosolv lignin was obtained from three different sources (Miscanthus sp., pine bark and solid anaerobic digestates from Organic Fraction of Municipal Solid Wastes) by an ethanol-based organosolv treatment carried out in a pressu...
Cistus ladanifer as a potential feedstock for biorefineries: A review
Alves-Ferreira, Júnia; Duarte, Luís C.; Fernandes, Maria C.; Pereira, Helena; Carvalheiro, FlorbelaCistus ladanifer (rockrose) is a widespread shrub species in the Mediterranean region well known due to its production of labdanum gum, especially in the hot season. Its leaves and branches can be subjected to different extraction and distillation processes to produce various types of extracts. The natural extracts of C. ladanifer have several applications, especially in the perfumery and cosmetics sector. C. l...
The Role of Mild Alkaline Pretreatment in the Biorefinery Upgrade of Spent Coff...
Ribeiro, Gabriel Mota; Martins, Pedro L.; Oliveira, Ana Cristina; Carvalheiro, Florbela; Fragoso, Rita; Duarte, Luís C.ABSTRACT: This work proposes a valorization route for spent coffee grounds (SCG), a widespread lignocellulosic residue, encompassing the production of: biomethane, lignin, and oligosaccharides as value-added products obtained simultaneously during a mild alkaline (NaOH) pretreatment. The studied operational variables were the reaction time (60-240 min), temperature (25-75 degrees C), and the NaOH concentration ...
Cistus ladanifer as a Potential Feedstock for Biorefineries: A Review
Alves Ferreira Caturra, Júnia Aparecida; Duarte, Luís C.; Fernandes, M. C.; Pereira, Helena; Carvalheiro, FlorbelaABSTRACT: Cistus ladanifer (rockrose) is a widespread shrub species in the Mediterranean region well known due to its production of labdanum gum, especially in the hot season. Its leaves and branches can be subjected to different extraction and distillation processes to produce various types of extracts. The natural extracts of C. ladanifer have several applications, especially in the perfumery and cosmetics se...
Xylitol Production by Debaryomyces hansenii in Extracted Olive Pomace Dilute-Ac...
Morais, Ana Rita C.; Duarte, Luís C.; Lourenço, Pedro; Torrado, Ivone; Brás, Teresa; Neves, Luísa, A.; Carvalheiro, FlorbelaABSTRACT: The extracted olive pomace (EOP) is an industrial lignocellulosic by-product of olive pomace oil extraction, currently mainly used for energy production through combustion. In this work, the hemicellulosic fraction of EOP was selectively hydrolyzed by diluted acid hydrolysis to obtain pentose-rich hydrolysates that can potentially be upgraded by Debaryomyces hansenii, targeting xylitol production. The...
Lignin utilization for the removal of microplastic particles from water
Găgeanu, Iuliana; Carvalheiro, Florbela; Ekielski, Adam; Duarte, Luís C.ABSTRACT: The focus of the research was to evaluate the use of lignin from different sources as an agent for the removal of diverse types of microplastics when present in wastewater. Organosolv lignin was obtained from three different sources (Miscanthus sp., pine bark and solid anaerobic digestates from Organic Fraction of Municipal Solid Wastes) by an ethanol-based organosolv treatment carried out in a pressu...