12 documents found, page 1 of 2
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...
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...
Oligosaccharides production by enzymatic hydrolysis of banana pseudostem pulp
Díaz, Sara; Ortega, Zaida; Benítez Vega, Antonio Nizardo; Marrero, María D.; Carvalheiro, Florbela; Duarte, Luís C.; Matsakas, LeonidasABSTRACT: Banana production generates significant amounts of agricultural wastes, being fiber extraction one of the most relevant alternatives for their valorization. This process produces banana's pseudostem pulp (BPP) as a byproduct, which shows an interesting composition for the biorefinery's biochemical platform, with high polysaccharides (68%) and low lignin contents. This work deals with the enzymatic hyd...
Production of Oligosaccharides from Pine Nut Shells by Autohydrolysis
Torrado, Ivone; Dionísio, Ana; Fernandes, M. C.; Roseiro, Luisa B.; Carvalheiro, Florbela; Pereira, Helena; Duarte, Luís C.ABSTRACT: Pinus pinea nuts are commercial relevant Mediterranean edible forest nuts, with an increasing production and market value, whose industrial processing yields a lignocellulosic by-product, the pine nut shells, currently only used for combustion. Little research has been done on pine nut shells that could support a value-added application for this residue. This work studies for the first time the produc...
D-Lactic acid production from Cistus ladanifer residues: Co-fermentation of pen...
Alves Ferreira Caturra, Júnia Aparecida; Carvalheiro, Florbela; Duarte, Luís C.; Ferreira, Ana R. P.; Martinez, Alfredo; Pereira, HelenaABSTRACT: n this study, glucan-rich solids, and xylose-rich hydrolysates obtained from Cistus ladanifer distillery residues (CLR) were used for D-lactic acid (D-LA) production by the D-lactogenic Escherichia coli strain JU15. Firstly, hemicellulosic hydrolysates obtained by the autohydrolysis process were submitted to dilute sulfuric acid catalysed post-hydrolysis. The influence of operational conditions on oli...
D-lactic acid production from hydrothermally pretreated, alkali delignified and...
Fernandes, M. C.; Alves Ferreira Caturra, Júnia Aparecida; Duarte, Luís C.; Pereira, Helena; Carvalheiro, Florbela; Martinez, AlfredoABSTRACT: Rockrose lignocellulosic residues (RR) were selectively fractionated for hemicellulose separation using autohydrolysis, followed by an alkaline treatment to solubilize the lignin. The cellulose-enriched solids were used to study the effect of solid loading (SL: 2-10%) and enzyme dosage (ED: 6.34-23.66 FPU/g dry biomass) on saccharification using a Doehlert experimental design, followed by fermentation...
Assessment of the effect of autohydrolysis treatment in banana’s pseudostem pulp
Díaz, Sara; Ortega, Zaida; Benítez Vega, Antonio Nizardo; Costa, Diogo; Carvalheiro, Florbela; Fernandes, M. C.; Duarte, Luís C.ABSTRACT: Banana's pseudostem pulp (BPP) is a potential by-product obtained in the mechanical fiber extraction of banana's pseudostem. Its chemical characterization revealed to have an interesting composition, with a high polysaccharides content and low content in lignin, which makes it particularly relevant for the biorefinery's biochemical platform. Autohydrolysis pretreatment, studied under isothermal (140 d...
Delignification of Cistus ladanifer Biomass by Organosolv and Alkali Processes
Alves Ferreira Caturra, Júnia Aparecida; Lourenço, Ana; Morgado, Francisca; Duarte, Luís C.; Roseiro, Luisa B.; Fernandes, M. C.; Pereira, HelenaABSTRACT: Residues of Cistus ladanifer obtained after commercial steam distillation for essential oil production were evaluated to produce cellulose enriched solids and added-value lignin-derived compounds. The delignification of extracted (CLRext) and extracted and hydrothermally pretreated biomass (CLRtreat) was studied using two organosolv processes, ethanol/water mixtures (EO), and alkali-catalyzed glycerol...
Cistus ladanifer as a source of chemicals : structural and chemical characteriz...
Alves Ferreira Caturra, Júnia Aparecida; Miranda, Isabel; Duarte, Luís C.; Roseiro, Luisa B.; Lourenço, Ana; Quilhó, Teresa; Cardoso, SofiaABSTRACT: Different biomass fractions of Cistus ladanifer and solid residues from essential oil distilleries were structurally and chemically evaluated. The C. ladanifer biomass fractions showed chemical differences mainly related to extractives (e.g., 10.8% and 53.7% in stems and leaves) and lignin (e.g., 21.2% and 15.4% in stems and leaves). The distillery residues were characterized by 41.5% extractives and ...
Comparative study on hydrolysis and bioethanol production from cardoon and rock...
Fernandes, M. C.; Ferro, M. D.; Paulino, A. F. C.; Evtuguin, D. V.; Xavier, A. M. R. B.; Chaves, HumbertoBioethanol production potential from cardoon ( Cynara cardunculus ) and rockrose ( Cistus ladanifer ), pretreated by diluted acid hydrolysis (DAH), was studied and compared by both, separate enzymatic hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) processes. DAH pretreatment allowed an increase of 5 fold to cardoon and 16 fold to rockrose in cellulose accessibility to...