15 documents found, page 1 of 2
Industrial Off-Gas Fermentation for Acetic Acid Production: A Carbon Footprint ...
Pacheco, Marta; Brac de la Perrière, Adrien; Moura, Patrícia; silva, carlaABSTRACT: Most industrial processes depend on heat, electricity, demineralized water, and chemical inputs, which themselves are produced through energy- and resource-intensive industrial activities. In this work, acetic acid (AA) production from syngas (CO, CO2, and H2) fermentation is explored and compared against a thermochemical fossil benchmark and other thermochemical/biological processes across four main ...
Improving Carbon Fixation and Acetate Production from Syngas Fermentation: On-D...
Pacheco, Marta; Silva, Tiago; silva, carla; Moura, PatríciaABSTRACT: Syngas fermentation is a promising carbon capture and utilization (CCU) technology for producing carboxylic acids while transforming low-cost waste gas into high-value products. This study evaluates the two bioreactor feeding strategies for synthesis gas (syngas) fermentation by Eubacterium callanderi (formerly Butyribacterium methylotrophicum) strain Marburg-on-demand feeding (ODF) and continuous fee...
Effects of Lignin Gasification Impurities on the Growth and Product Distributio...
Pacheco, Marta; Pinto, Filomena; Brunsvik, Anders; Andre, Rui N.; Marques, Paula; Mata, Ricardo; Ortigueira, Joana; Gírio, Francisco; Moura, PatríciaABSTRACT: This work evaluated the effects of condensable syngas impurities on the cell viability and product distribution of Butyribacterium methylotrophicum in syngas fermentation. The condensates were collected during the gasification of two technical lignins derived from wheat straw (WST) and softwood (SW) at different temperatures and in the presence or absence of catalysts. The cleanest syngas with 169 and...
A Systematic Review of Syngas Bioconversion to Value-Added Products from 2012 t...
Pacheco, Marta; Moura, Patrícia; Silva, CarlaABSTRACT: Synthesis gas (syngas) fermentation is a biological carbon fixation process through which carboxydotrophic acetogenic bacteria convert CO, CO2, and H-2 into platform chemicals. To obtain an accurate overview of the syngas fermentation research and innovation from 2012 to 2022, a systematic search was performed on Web of Science and The Lens, focusing on academic publications and patents that were publ...
The role of Anaesthesiologists at Different Levels of Difficult Airway Manageme...
Pacheco, Marta; Castro, Rita; Aguiar, José; Órfão, JorgeMucopolysaccharidoses are a group of lysosomal storage diseases. The deficiency of specific lysosomal enzymes leads to accumulation of glycosaminoglycans (GAGs) in the tissues and organs. Patients had Difficult Airway (DA) criteria: long epiglottis, anterior larynx, small trachea, short neck, temporo-mandibular joint rigidity, cervical instability and complications with difficult ventilation and oxygenation. We...
Lignin syngas bioconversion by Butyribacterium methylotrophicum: advancing towa...
Pacheco, Marta; Pinto, Filomena; Ortigueira, Joana; Silva, Carla; Gírio, FranciscoABSTRACT: Hybrid bio-thermochemical based technologies have the potential to ensure greater feedstock flexibility for the production of bioenergy and bioproducts. This study focused on the bioconversion of syngas produced from low grade technical lignin to C-2-/C-4-carboxylic acids by Butyribacterium methylotrophicum. The effects of pH, medium supplementation and the use of crude syngas were analyzed. At pH 6.0...
Biocatalytic performance of Butyribacterium methylotrophicum in the long-term c...
Pacheco, Marta; Pinto, Filomena; Andre, Rui N.; Marques, Paula; Gírio, Francisco; Moura, PatríciaABSTRACT: Second-generation biorefineries produce large streams of low-grade lignin. Its thermochemical conversion, through gasification, enables the carbon recovery from an otherwise recalcitrant by-product. The main product of gasification is producer synthesis gas (PS), which is mainly composed by carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), methane (CH4) and minor impurities. Carboxydotrophic ...
Infraestrutura de investigação para a biomassa e a bioenergia: BBRI - Biomass a...
Reis, Alberto; Abreu, Mariana; Pacheco, Marta; Bernardo, Joana; Silva, R.; Domingues, Lucília; Teixeira, J.A.; Gírio, FranciscoRESUMO: A BBRI é a única Infraestrutura Nacional de Investigação em Biomassa e Bioenergia, que integra o Roteiro Nacional de Infraestruturas de Investigação de Interesse Estratégico em Portugal desde 2014, sendo distribuída por dois nós. O nó de Lisboa tem por base as infraestruturas laboratoriais e piloto existentes na Unidade de Bioenergia e Biorrefinarias (UBB) do Laboratório Nacional de Energia e Geologia (...
Fixação biológica de CO, CO2 e H2: fermentação de gás de síntese com produção d...
Pacheco, Marta; Ortigueira, Joana; Gírio, Francisco; Moura, PatríciaRESUMO: Os perfis de assimilação de monóxido de carbono (CO), dióxido de carbono (CO2) e hidrogénio (H2) de gás de síntese (singás) por Butyribacterium methylotrophicum foram caracterizados e foram determinadas as percentagens de fixação de carbono. Testaram-se duas formulações diferentes de singás, duas condições de pH para a cultura do microrganismo e o efeito da suplementação do meio com acetato de sódio (Na...
Food waste biorefinery : stability of an acidogenic fermentation system with ca...
Ortigueira, Joana; Pacheco, Marta; Trancoso, Maria Ascensão; Farrancha, Pedro; Correia, Jorge; Silva, Carla M.; Moura, PatríciaABSTRACT: The present study focused on the integration of the non-sterile conversion of food waste (FW) into hydrogen (H2) through dark fermentation with the subsequent electricity generation in a proton-exchange membrane fuel cell (PEMFC), and the assessment of the global warming potential (GWP) of the process. The acidogenic conversion of FW performed in continuous operation for 16 days produced 45.6 ± 0.1 L ...