12 documents found, page 1 of 2
Simultaneous removal of multiple metal(loid)s and neutralization of acid mine d...
Gonçalves, Nuno P. F.; da Silva, Eduardo Ferreira; Tarelho, Luís A. C.; Labrincha, João A.; Novais, Rui M.The mining industry is one of the largest sources of environmental concern globally. Herein we report for the first time the application of highly porous 3D-printed sorbents containing high amounts (50 wt%) of red mud, a hazardous waste derived from the alumina industry, for the remediation of acid mine drainage (AMD). The sorption capacity of the inorganic polymers was initially evaluated for the simultaneous ...
Catalytic performance of thermochemically treated sludge generated in the Fento...
Ribeiro, João Peres; Marques, Catarina C.; Neves, Márcia C.; Gomes, Helena G. M. F.; Sarinho, Luana; Tarelho, Luís A. C.; Nunes, Maria IsabelAlthough the scientific community recognises the issue of iron wastage as ferric sludge following Fenton processes, there has been limited focus on valorising of this sludge. This work proposes a circular solution to valorise Fenton sludge as catalyst of the Fenton process in the treatment of industrial wastewater. To achieve this, sludges were collected after treating pulp bleaching wastewater with Fenton proc...
Granulated biomass fly ash coupled with Fenton process for pulp and paper waste...
Ribeiro, João Peres; Cruz, Nuno C.; Neves, Márcia C.; Rodrigues, Sónia M.; Tarelho, Luís A. C.; Nunes, Maria IsabelThe work describes the combination of granulated biomass fly ash (GBFA) with Fenton process to enhance the removal of adsorbable organic halides (AOX) from pulp bleaching wastewater. At optimal operating conditions, wastewater's chemical and biochemical oxygen demand (COD and BOD5, respectively) and colour were also quantified, and operating cost of treatment assessed. For the first time, raw pulp bleaching was...
Catalytic O2-steam gasification of biomass over Fe2-xMnxO3 oxides supported on ...
Ruivo, Luis C. M.; Gomes, Helena; Lopes, Daniela V.; Yaremchenko, Aleksey; Vilas-Boas, Catarina; Tarelho, Luís A. C.; Frade, Jorge R.In the present study, catalytic gasification of biomass was investigated by incorporation of a supported Fe2-xMnxO3 catalyst into the freeboard zone of a bubbling fluidized bed gasifier. The material was processed by combining incipient wetness impregnation with microwave-assisted firing methods. These catalysts were characterized by elemental, structural and microstructural analyses, and redox testing by therm...
Characterization of ashes produced from different biomass fuels used in combust...
Capela, Marinélia Neto; Tobaldi, David Maria; Seabra, Maria Paula; Tarelho, Luís A. C.; Labrincha, João A.In the boilers of pulp mills the fuel blends used vary because they are essentially composed of residual forest biomass. Consequently, the physical-chemical properties of the produced ash streams can exhibit high temporal variability, making their proper management and recycling difficult. This study aims to characterize the ash from the incineration of biomass samples used as fuel in order to understand its in...
Techno-economic analysis of forest biomass blends gasification for small-scale ...
Cardoso, João Sousa; Silva, Valter; Eusébio, Daniela; Lima Azevedo, Inês; Tarelho, Luís A. C.The present work assesses the energetic valorisation of forest biomass blends in the archipelago of the Azores, to do so, a multiphase 2-D Eulerian-Eulerian model was employed to simulate forest biomass gasification in a pilotscale fluidized bed reactor. The numerical model was validated under experimental gasification runs performed in a 250 kWth quasi-industrial biomass gasifier. The potential use of the prod...
Critical review of key variables affecting potential recycling applications of ...
Cruz, Nuno C.; Silva, Flávio C.; Tarelho, Luís A. C.; Rodrigues, Sónia M.Growing quantities of biomass ash are produced worldwide due to an increasing use of biomass for heat and electricity generation. Physical-chemical properties and elemental composition of ash at industrial biomass thermal power plants show significant variations. Experimental methods to characterize ashes are time-consuming and difficult to implement on a routine basis, posing severe limitations to the selectio...
Use of wastes from the pulp and paper industry for the remediation of soils deg...
Alvarenga, Paula; Rodrigues, Débora; Mourinha, Clarisse; Palma, Patrícia; de Varennes, Amarilis; Cruz, Nuno; Tarelho, Luís A. C.; Rodrigues, SóniaFly ash (FA) from biomass combustion and biological sludge (S), both wastes from the pulp and paper industry, were granulated in different proportions (90% FA+10% S, and 70% FA+30% S w/w, dry weight basis, dw) and used to recover the functionality of soils affected by mining activities (Aljustrel, Iberian Pyrite Belt), with and without the application of municipal solid waste compost (MSWC). Application doses o...
Thermoeconomic analysis of integrated production of biochar and process heat fr...
Salgado, Mario A. Heredia; Tarelho, Luís A. C.; Matos, Arlindo; Robaina, M.; Narváez, Ricardo; Peralta, Miguel E.Quinoa and lupin are emergent sectors recognized as major promoters of social and economic development in the producer indigenous communities of Ecuador. The associated industrial process requires thermal energy typically produced using subsidized diesel or LPG. This analysis shows that 37.7% of the fuel costs of the analyzed industries are covered by the government in the form of subsidies. Hence, a major risk...
Characteristics of ash and particle emissions during bubbling fluidised bed com...
Ribeiro, João Peres; Vicente, Estela Domingos; Alves, Célia; Querol, Xavier; Amato, Fulvio; Tarelho, Luís A. C.Combustion of residual forest biomass (RFB) derived from eucalypt (Eucalyptus globulus), pine (Pinus pinaster) and golden wattle (Acacia longifolia) was evaluated in a pilot-scale bubbling fluidised bed reactor (BFBR). During the combustion experiments, monitoring of temperature, pressure and exhaust gas composition has been made. Ash samples were collected at several locations along the furnace and flue gas tr...