51 documents found, page 1 of 6
Admissibility Grid to Support the Decision for the Preferential Routing of Port...
Crujeira, Teresa; Trancoso, Maria Ascensão; Eusebio, Ana; Oliveira, Ana Cristina; Passarinho, Paula; Abreu, Mariana; Marques, Isabel PaulaABSTRACT: A methodology was developed to assess the allocation of different types of endogenous waste biomass to eight technologies for producing electricity, heat, biogas and advanced biofuels. It was based on the identification of key physicochemical parameters for each conversion process and the definition of limit values for each parameter, applied to two different matrices of waste biomass. This enabled th...
Influence of diagenetic processes and terrestrial/anthropogenic sources in the ...
Mil-Homens, Mário; Brito, Pedro Oliveira; Caetano, M.; Costa, A. M.; Lebreiro, Susana; Trancoso, Maria Ascensão; De Stigter, H.ABSTRACT: Temporal variations of rare earth elements (REE) and their fractionation patterns, major elements, Pb and Hg were determined in two multicores collected at 445 and 2100 m water depth (mwd) in the Cascais submarine canyon (CSC). The PAAS-normalized REE patterns suggest mixing of Tagus estuarine and marine sediments, marked by MREE (Nd‐Dy series) enrichment and by positive Eu-anomaly, with marine sedime...
Validation and setting up quality control for characterization of aluminum allo...
Trancoso, Maria Ascensão; Nogueira, Carlos; Calisto, Sandra C.ABSTRACT: The improvement of recycling rates of metal waste, namely those of end-of life vehicles, is nowadays becoming imperative. Aluminum and its alloys are the main metal components in non-ferrous fraction of auto-shredders separated out after sampling. Silicon, Mg, Cu, Zn, Mn, Ti, Fe and Cr are alloying elements, which allowed the identification and differentiation of Al alloys. Flame Atomic Absorption Spe...
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 ...
Controlo analítico de impurezas em misturas de sais fundidos usadas em tecnolog...
Sousa, Ana R.; Calisto, Sandra C.; Crujeira, Teresa; Trancoso, Maria AscensãoCIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar; RESUMO: Apresentam-se métodos de ensaio para quantificar impurezas em misturas de sais fundidos que combina a cromatografia iónica para cloreto e sulfato, a análise de fluxo segmentado para nitrito, a espectrometria de absorção atómica com chama para cálcio, magnésio e sódio. As impurezas metálicas são identificadas por análise...
Measurement of total reactive phosphorus in natural water by molecular spectrop...
Silva, Ricardo Bettencourt da; Trancoso, Maria Ascensão; Teixeira, P. Alexandra; Oliveira, Cristina M. R. Ramiro de; Mosca, Alice I. de JesusABSTRACT: Phosphorus occurs in natural waters almost solely as phosphates.
Metal concentrations and removal along the SBR wastewater treatment plant of To...
Cantinho, P.; Santos, M. M. Correia dos; Trancoso, Maria Ascensão; Cortês, E.; Matos, M.ABSTRACT: The concerns on metals in municipal Wastewater Treatment Plants (WWWTPs) discharges are mainly related with its contents in sludge, witch can prevent its application in land and so the recycling of valuable nutrients, and with the more restrictive limits foreseen for final effluents, due to the recent guidelines introduced by European Water Framework Directive (EUWFD).
Metal soption and partitioning coefficients in all matrices of the Torres Vedra...
Cantinho, P.; Santos, M. M. Correia dos; Trancoso, Maria Ascensão; Cortês, E.; Matos, M.ABSTRACT: The literature review concerning the issue of metals behaviour and fate throughout WWTPs shows that, although relevant data have been published in recent decades, results are not consensual and more studies are needed, particulary from data obtained in full scale WWTPs.
Analytical protocol for the characterization of solid organic fractions: contri...
Trancoso, Maria Ascensão; Crujeira, Teresa; Sousa, R.; Calisto, Sandra C.; Branco, J.; Oliveira, Ana Cristina; Passarinho, Paula; Abreu, MarianaABSTRACT: In the scope of the CONVERTE project an optimised and uniformed methodology was developed in order to better evaluate the use of endogenous biomasses for energy production by biochemical or thermochemical processes. A protocol for preparation and characterization was designed and validated by the use of biomass certified reference materials and quality control actions. Extensive analytical work was pe...
Avaliação da conformidade do teor em enxofre em gasóleo e biodiesel
Crujeira, Teresa; Calisto, Sandra C.; Trancoso, Maria AscensãoRESUMO: Os transportes rodoviários que utilizam combustíveis de origem fóssil são uma das principais fontes de emissão de poluentes para a atmosfera, conduzindo à degradação da qualidade do ar, em particular nos grandes centros urbanos. A necessidade de utilização de combustíveis de origem renovável levou ao desenvolvimento de combustíveis alternativos, que permitem a redução significativa de emissões de CO2, o...