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Study of mass loss and elemental analysis of pine wood pellets in a small-scale...
Fraga, Lelis Gonzaga; Silva, João Pedro Vasconcelos; Teixeira, J. Carlos; Ferreira, Manuel Eduardo Cardoso; Teixeira, S. F. C. F.; Vilarinho, CândidaStudying the thermal decomposition of wood pellets is an important subject in order to understand the behavior of wood pellets during the combustion process. In fact, wood pellets have become an important fuel used in boiler combustion. The objective of this study is to investigate the mass loss and elemental analysis of pine wood pellets at various times and temperatures. Commercial pellets with a diameter of ...
Evaluation of microalgae as bioremediation agent for poultry effluent and biost...
Viegas, Catarina; Gouveia, Luisa; Gonçalves, Maria MargaridaABSTRACT: This work addresses how a pre-treatment involving biomass ash influences the poultry effluent's bioremediation using three microalga strains, such as Chlorella vulgaris, Chlorella protothecoides and Tetradesmus obliquus. The undiluted effluent served as the culture medium for the growth, both in batch and semi continuous modes, and the remediation efficiency and biomass production yield were quantifie...
Energy recovery via thermal gasification from waste insulation electrical cable...
Mota-Panizio, Roberta; Hermoso-Orzáez, Manuel Jesús; Carmo-Calado, Luís; de Campos, Victor Arruda Ferraz [UNESP]; Silveira, José Luz [UNESP]Made available in DSpace on 2021-06-25T10:44:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-11-02; European Regional Development Fund; Fundação para a Ciência e a Tecnologia; The recovery of noble metals from electrical wires and cables results in waste materials such as polyvinyl chloride (PVC) and polyethylene (PE), that is, waste insulation electrical cables (WIEC), which have been processed by ga...
Optimization of Biochar Production by Co-Torrefaction of Microalgae and Lignoce...
Viegas, Catarina; Nobre, Catarina; Correia, Ricardo; Gouveia, Luisa; Gonçalves, Maria MargaridaABSTRACT: Co-torrefaction of microalgae and lignocellulosic biomass was evaluated as a method to process microalgae sludge produced from various effluents and to obtain biochars with suitable properties for energy or material valorization. The influence of four independent variables on biochar yield and properties was evaluated by a set of experiments defined by response surface methodology (RSM). The biochars ...
A circular approach for landfill leachate treatment: chemical precipitation wit...
Viegas, Catarina; Nobre, Catarina; Mota, André; Vilarinho, Cândida; Gouveia, Luisa; Gonçalves, Maria MargaridaABSTRACT: The aim of this work was to study an integrated approach for landfill leachate remediation comprising chemical precipitation with biomass bottom ash as a pre-treatment to reduce color and turbidity followed by bioremediation through microalgae treatment for effluent disposal. Optimal pre-treatment conditions were determined through batch experiments and were found to be 160 g L-1 ash dose, 96 h of con...
Evaluation of microalgae as bioremediation agent for poultry effluent and biost...
Viegas, Catarina; Gouveia, Luisa; Gonçalves, Maria MargaridaABSTRACT: This work addresses how a pre-treatment involving biomass ash influences the poultry effluent's bioremediation using three microalga strains, such as Chlorella vulgaris, Chlorella protothecoides and Tetradesmus obliquus. The undiluted effluent served as the culture medium for the growth, both in batch and semi continuous modes, and the remediation efficiency and biomass production yield were quantifie...
Aquaculture wastewater treatment through microalgal: biomass potential applicat...
Viegas, Catarina; Gouveia, Luisa; Gonçalves, Maria MargaridaABSTRACT: The use of microalgae to remediate raw effluent from brown crab aquaculture was evaluated by performing batch mode growth tests using separately the microalgae Chlorella vulgaris (Cv), Scenedesmus obliquus (Sc), Isochrysis galbana (Ig), Nannocloropsis salina (Ns), and Spirulina major (Sp). Removal efficiencies in batch growth were 100% for total nitrogen and total phosphorus for all microalgae. Chemic...
Combustion of biomass based pellets with pyrolysis bio-oils
Vilarinho, Cândida; Teixeira, J. Carlos; Araújo, Jorge; Ferreira, Manuel Eduardo Cardoso; Carvalho, Joana; Gonçalves, Maria MargaridaDue to increased energy demands and environmental concerns, biomass has become an increasingly attractive primary source in the energy mix. It can be used as heat supply to both domestic and industrial sectors, but also as fuel in dedicated or co-generation-based power plants and it is also considered CO2 neutral. Amongst the most widely used formats, wood pellets are very attractive because of their standardiz...
Production of bio-hydrocarbons by hydrotreating of pomace oil
Pinto, Filomena; Varela, Francisco; Gonçalves, Maria Margarida; Andre, Rui N.; Costa, Paula; Mendes, BenildeOlive pomace oil is a by-product from the olive oil industry that is still being used in the food industry as a low value vegetable oil. Crude olive pomace oil needs to be refined and is blended with virgin olive oils before being used as edible oil. The detection of toxic compounds led to more restricted legislation and to the search of alternative valorisation processes, such as hydrotreating to obtain bio-hy...
Production of bio-hydrocarbons by hydrotreating of pomace oil
Pinto, Filomena; Varela, Francisco; Gonçalves, Maria Margarida; Andre, Rui N.; Costa, Paula; Mendes, BenildeOlive pomace oil is a by-product from the olive oil industry that is still being used in the food industry as a low value vegetable oil. Crude olive pomace oil needs to be refined and is blended with virgin olive oils before being used as edible oil. The detection of toxic compounds led to more restricted legislation and to the search of alternative valorisation processes, such as hydrotreating to obtain bio-hy...