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Joan Salvadó
Chemical Engineering Department, Universitat Rovira i Virgili, 43003 Tarragona, Spain

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Journal article
Published: 03 April 2020 in Molecules
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The main objective of this work was to further analyze the optimization of the production factors of Arundo donax L. fiberboards obtained without adhesives. The production of boards derived from Arundo donax L. without added adhesives and with high mechanical performance has already been demonstrated. This present study explored a modification in the production process through a final curing thermal treatment (final heat treatment, FHT). Since pressing time is an influential factor in the production cost, it is expected that curing allows a reduction of this time. This study compared the results obtained by three panel-production alternatives: long pressing time (tp) without curing and long and short tp with FHT. Of the two factors analyzed, pressing pressure (Pp) was the most important production factor in both the modulus of elasticity (MOE) and modulus of rupture (MOR), while curing was the most important factor for the internal bond (IB). The study shows that a FHT facilitates the distribution of lignin and a possible improvement in the quantity and quality of bonds between lignin and cellulosic fibers. As a consequence, it improves the IB, produces boards with more homogeneous physical and mechanical properties and thereby makes them more hydrophobic. The curing thermal treatment allows high performance panels to be obtained in a manner which is more ecological, quicker, and cheaper.

ACS Style

Diego Ramos; Francesc Ferrando; Xavier Farriol; Joan Salvadó. Optimization of the Production Factors of Boards Obtained from Arundo donax L. Fibers without Added Adhesives. Molecules 2020, 25, 1660 .

AMA Style

Diego Ramos, Francesc Ferrando, Xavier Farriol, Joan Salvadó. Optimization of the Production Factors of Boards Obtained from Arundo donax L. Fibers without Added Adhesives. Molecules. 2020; 25 (7):1660.

Chicago/Turabian Style

Diego Ramos; Francesc Ferrando; Xavier Farriol; Joan Salvadó. 2020. "Optimization of the Production Factors of Boards Obtained from Arundo donax L. Fibers without Added Adhesives." Molecules 25, no. 7: 1660.

Journal article
Published: 21 August 2018 in Molecules
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This paper explores the possibility of producing all-lignocellulosic fiberboards from Arundo donax L. as a source of lignocellulosic fibers with no synthetic binders. This raw material was steam exploded with a thermomechanical aqueous vapor process in a batch reactor. The Arundo donax raw material and its obtained pulp were characterized in terms of chemical composition and the results were compared to other lignocellulosic materials. The chemical composition of steam exploded Arundo fibers showed high cellulose and a moderate lignin content suggesting it was a good raw material for fiberboard production. The all-lignocellulosic fiberboards were produced on laboratory scale; using the steam exploded Arundo donax by means of a wet process. The effects of pressing pressure on physical and mechanical properties were evaluated and the conditions that optimize the responses were found. The analyzed properties were density (d); water absorption (WA); thickness swelling (TS); modulus of elasticity (MOE); modulus of rupture (MOR); and internal bond strength (IB). The tested levels of the pressing pressure range from 0.35 to 15 MPa. The optimum IB; MOE; MOR; WA and TS were 1.28 MPa, 7439 MPa, 40.4 MPa, 17.6% and 13.3%, respectively. The obtained fiberboards were of very good quality and more than satisfy the requirements of the relevant standard specifications.

ACS Style

Diego Ramos; Nour-Eddine El Mansouri; Francesc Ferrando; Joan Salvadó. All-lignocellulosic Fiberboard from Steam Exploded Arundo Donax L. Molecules 2018, 23, 2088 .

AMA Style

Diego Ramos, Nour-Eddine El Mansouri, Francesc Ferrando, Joan Salvadó. All-lignocellulosic Fiberboard from Steam Exploded Arundo Donax L. Molecules. 2018; 23 (9):2088.

Chicago/Turabian Style

Diego Ramos; Nour-Eddine El Mansouri; Francesc Ferrando; Joan Salvadó. 2018. "All-lignocellulosic Fiberboard from Steam Exploded Arundo Donax L." Molecules 23, no. 9: 2088.

Journal article
Published: 22 March 2018 in Processes
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The aim of this study is to explore an innovative downstream route for microalgae processing to reduce cost production. Experiments have been carried out on cell disruption and fractionation stages to recover lipids, sugars, and proteins. Steam explosion and dynamic membrane filtration were used as unit operations. The species tested were Nannochloropsis gaditana, Chlorella sorokiniana, and Dunaliella tertiolecta with different cell wall characteristics. Acid-catalysed steam explosion permitted cell disruption, as well as the hydrolysis of carbohydrates and partial hydrolysis of proteins. This permitted a better access to non-polar solvents for lipid extraction. Dynamic filtration was used to moderate the impact of fouling. Filtration enabled two streams: A permeate containing water and monosaccharides and a low-volume retentate containing the lipids and proteins. The necessary volume of solvent to extract the lipids is thus much lower. An estimation of operational costs of both steam explosion and membrane filtration was performed. The results show that the steam explosion operation cost varies between 0.005 $/kg and 0.014 $/kg of microalgae dry sample, depending on the cost of fuel. Membrane filtration cost in fractionation was estimated at 0.12 $/kg of microalgae dry sample.

ACS Style

Esther Lorente; Monika Haponska; Ester Clavero; Carles Torras; Joan Salvadó. Steam Explosion and Vibrating Membrane Filtration to Improve the Processing Cost of Microalgae Cell Disruption and Fractionation. Processes 2018, 6, 28 .

AMA Style

Esther Lorente, Monika Haponska, Ester Clavero, Carles Torras, Joan Salvadó. Steam Explosion and Vibrating Membrane Filtration to Improve the Processing Cost of Microalgae Cell Disruption and Fractionation. Processes. 2018; 6 (4):28.

Chicago/Turabian Style

Esther Lorente; Monika Haponska; Ester Clavero; Carles Torras; Joan Salvadó. 2018. "Steam Explosion and Vibrating Membrane Filtration to Improve the Processing Cost of Microalgae Cell Disruption and Fractionation." Processes 6, no. 4: 28.

Journal article
Published: 16 May 2017 in Fluids
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Miniaturized cells can be used in photo-electrochemistry to perform water splitting. The geometry, process variables and removal of oxygen bubbles in these cells need to be optimized. Bubbles tend to remain attached to the catalytic surface, thus blocking the reaction, and they therefore need to be dragged out of the cell. Computational Fluid Dynamics simulations have been carried out to assess the design of miniaturized cells and their results have been compared with experimental results. It has been found that low liquid inlet velocities (~0.1 m/s) favor the homogeneous distribution of the flow. Moderate velocities (0.5–1 m/s) favor preferred paths. High velocities (~2 m/s) lead to turbulent behavior of the flow, but avoid bubble coalescence and help to drag the bubbles. Gravity has a limited effect at this velocity. Finally, channeled cells have also been analyzed and they allow a good flow distribution, but part of the catalytic area could be lost. The here presented results can be used as guidelines for the optimum design of photocatalytic cells for the water splitting reaction for the production of solar fuels, such as H2 or other CO2 reduction products (i.e., CO, CH4, among others).

ACS Style

Carles Torras; Esther Lorente; Simelys Hernández; Nunzio Russo; Joan Salvadó. Hydrodynamics and Oxygen Bubble Characterization of Catalytic Cells Used in Artificial Photosynthesis by Means of CFD. Fluids 2017, 2, 25 .

AMA Style

Carles Torras, Esther Lorente, Simelys Hernández, Nunzio Russo, Joan Salvadó. Hydrodynamics and Oxygen Bubble Characterization of Catalytic Cells Used in Artificial Photosynthesis by Means of CFD. Fluids. 2017; 2 (2):25.

Chicago/Turabian Style

Carles Torras; Esther Lorente; Simelys Hernández; Nunzio Russo; Joan Salvadó. 2017. "Hydrodynamics and Oxygen Bubble Characterization of Catalytic Cells Used in Artificial Photosynthesis by Means of CFD." Fluids 2, no. 2: 25.

Journal article
Published: 01 May 2017 in Renewable Energy
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ACS Style

Joaquin Capablo; Joan Salvadó. Estimating heat transfer losses caused by alkali salt deposits in biomass combustion. Renewable Energy 2017, 105, 449 -457.

AMA Style

Joaquin Capablo, Joan Salvadó. Estimating heat transfer losses caused by alkali salt deposits in biomass combustion. Renewable Energy. 2017; 105 ():449-457.

Chicago/Turabian Style

Joaquin Capablo; Joan Salvadó. 2017. "Estimating heat transfer losses caused by alkali salt deposits in biomass combustion." Renewable Energy 105, no. : 449-457.

Journal article
Published: 01 May 2017 in BioResources
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Arundo donax is a cane species with high growing productivity, and it is becoming an important source of biomass. The main objective of this study was to obtain fibreboards with high mechanical performance from A. donax without any added adhesive. Boards made without adhesive are free from formaldehyde emissions and consume no fossil resources. The characteristics of the obtained boards depended on the original material, steam explosion pre-treatments, and forming conditions (pressure, temperature, and pressing time). Production parameters were optimized. The effect of forming pressure on the physical and mechanical properties density, elastic modulus (MOE), modulus of rupture (MOR), tensile strength perpendicular to the faces (IB), thickness swelling, and water absorption of the obtained boards was studied. The European Norms (EN) methodologies were used to test the board specifications. Density, MOE, and MOR were modelled by a double reciprocal function. TS and WA were modelled with a reciprocal function in X. The boards obtained met and sometimes exceeded the requirements of these standards for the most demanding structural use.

ACS Style

Diego Ramos; Joan Salvadó; Francesc Fernando. High Mechanical Performance Boards Made from Fibers of Arundo donax without Added Adhesives. BioResources 2017, 12, 1 .

AMA Style

Diego Ramos, Joan Salvadó, Francesc Fernando. High Mechanical Performance Boards Made from Fibers of Arundo donax without Added Adhesives. BioResources. 2017; 12 (3):1.

Chicago/Turabian Style

Diego Ramos; Joan Salvadó; Francesc Fernando. 2017. "High Mechanical Performance Boards Made from Fibers of Arundo donax without Added Adhesives." BioResources 12, no. 3: 1.

Journal article
Published: 01 July 2016 in Journal of Environmental Management
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Several characteristics make Phaeodactylum tricornutum potential candidate for biofuels production such as methane and biodiesel. For this reason, some alternatives are evaluated in this manuscript to improve the conversion of this microalgae into methane. One of these alternatives is the addition of sewage sludge to Phaeodactylum tricornutum for anaerobic co-digestion. Although the co-digestion resulted in lack of synergy, the absence of inhibition indicated that both substrates could be co-digested under certain circumstances, for example if microalgae are cultivated for wastewater treatment purposes. The extraction of lipids using organic solvents has been evaluated for biodiesel production but also as a pre-treatment for anaerobic digestion. The results revealed that the type of solvent influences lipid and biodiesel yields. The high polarity of the mixture methanol/hexane increased the lipid and the biodiesel yields from 10 ± 1 to 53 ± 2 gLipids/100 gVS and from 7 ± 1 to 11 ± 1 gBiodiesel/100 gVS compared with hexane. However, none of these solvents affected the composition of biodiesel. Regarding the methane production after the extraction, it yielded 257 ± 8 and 180 ± 6 mLCH4/gVS from lipid-extracted P. tricornutum using hexane and methanol/hexane respectively. The methane production from the raw microalga was 258 ± 5 mLCH4/gVS in the same experiment. The difference in methane production, mainly after the extraction with methanol/hexane, was a consequence of the changes in the composition of the microalgae after extraction. The extraction did not influence the biodegradability. The ultrasonic pre-treatment prior anaerobic digestion completely disrupted the microalgae cells, but the solubilisation of the organic fraction was scarce (<9.5%). The methane production from pre-treated samples was barely 10-11% higher than the obtained from non pre-treated samples, indicating that the refractory nature of the organic fraction in P. tricornutum is the main obstacle for the methane production.

ACS Style

M.P. Caporgno; M. Olkiewicz; C. Torras; J. Salvadó; E. Clavero; C. Bengoa. Effect of pre-treatments on the production of biofuels from Phaeodactylum tricornutum. Journal of Environmental Management 2016, 177, 240 -246.

AMA Style

M.P. Caporgno, M. Olkiewicz, C. Torras, J. Salvadó, E. Clavero, C. Bengoa. Effect of pre-treatments on the production of biofuels from Phaeodactylum tricornutum. Journal of Environmental Management. 2016; 177 ():240-246.

Chicago/Turabian Style

M.P. Caporgno; M. Olkiewicz; C. Torras; J. Salvadó; E. Clavero; C. Bengoa. 2016. "Effect of pre-treatments on the production of biofuels from Phaeodactylum tricornutum." Journal of Environmental Management 177, no. : 240-246.

Research article
Published: 29 April 2016 in ACS Sustainable Chemistry & Engineering
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ACS Style

M. P. Caporgno; E. Clavero; C. Torras; Joan Salvadó; O. Lepine; J. Pruvost; J. Legrand; Jaume Giralt; C. Bengoa. Energy and Nutrients Recovery from Lipid-Extracted Nannochloropsis via Anaerobic Digestion and Hydrothermal Liquefaction. ACS Sustainable Chemistry & Engineering 2016, 4, 3133 -3139.

AMA Style

M. P. Caporgno, E. Clavero, C. Torras, Joan Salvadó, O. Lepine, J. Pruvost, J. Legrand, Jaume Giralt, C. Bengoa. Energy and Nutrients Recovery from Lipid-Extracted Nannochloropsis via Anaerobic Digestion and Hydrothermal Liquefaction. ACS Sustainable Chemistry & Engineering. 2016; 4 (6):3133-3139.

Chicago/Turabian Style

M. P. Caporgno; E. Clavero; C. Torras; Joan Salvadó; O. Lepine; J. Pruvost; J. Legrand; Jaume Giralt; C. Bengoa. 2016. "Energy and Nutrients Recovery from Lipid-Extracted Nannochloropsis via Anaerobic Digestion and Hydrothermal Liquefaction." ACS Sustainable Chemistry & Engineering 4, no. 6: 3133-3139.

Journal article
Published: 20 November 2015 in Polymer Engineering & Science
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One of the challenges in membrane technology is predicting permeability in porous membranes for liquid applications in an easy and inexpensive way. This is the aim of this work. To achieve this objective, several techniques can be considered. In this study, a morphological approach from two-dimensional scanning electron micrographs is proposed. First, numerical membrane morphological parameters have been determined from micrographs by using the QUANTS tool, which applies a texture recognition process. Second, the obtained data have been fit to the Darcy's and Hagen–Poiseuille models to calculate permeations. The QUANTS results have also been compared with the ones obtained through a mercury porosimeter, which is a classic and well-known methodology. Each parameter of the Hagen–Poiseuille model has been analyzed. A comparison between experimentally measured permeations and calculated ones has been performed. An even easier approach is proposed to predict flow rate with the only knowledge of membrane surface mean pore size. This method is based on cross-section pore size interpolation by using function fits from surface mean pore sizes. The obtained results show a reasonable agreement between measured and computed results, making this technique a valid approach for predicting membrane permeability. POLYM. ENG. SCI., 2015. © 2015 Society of Plastics Engineers

ACS Style

Claudia Nurra; Raphaelle Carraud; Said Pertuz; Domenec Puig; Miguel A. García; Joan Salvadó; Carles Torras; Luizildo Pitol-Filho. Toward the prediction of porous membrane permeability from morphological data. Polymer Engineering & Science 2015, 56, 118 -124.

AMA Style

Claudia Nurra, Raphaelle Carraud, Said Pertuz, Domenec Puig, Miguel A. García, Joan Salvadó, Carles Torras, Luizildo Pitol-Filho. Toward the prediction of porous membrane permeability from morphological data. Polymer Engineering & Science. 2015; 56 (1):118-124.

Chicago/Turabian Style

Claudia Nurra; Raphaelle Carraud; Said Pertuz; Domenec Puig; Miguel A. García; Joan Salvadó; Carles Torras; Luizildo Pitol-Filho. 2015. "Toward the prediction of porous membrane permeability from morphological data." Polymer Engineering & Science 56, no. 1: 118-124.

Journal article
Published: 05 March 2015 in Environmental Technology
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Harvesting is one of the key challenges to determine the feasibility of producing biodiesel from algae. This paper presents experimental results for a cost-effective system to harvest Chaetoceros calcitrans, using natural sedimentation, flocculation, and inducing pH. No efficient sedimentation of microalgal cells was observed only by gravity. By alkalinity-induced flocculation, at a pH value of 9.51, 86% recovery of the cells was achieved with a sedimentation rate of 125 cm/h and a concentration factor (CF) of 4 (volume/volume (v/v)) in 10 min. The maximum photochemical quantum yield of photosystem II (Fv/Fm) of concentrated cells was almost the same as fresh culture (0.621). Commercial flocculants, aluminium sulphate and poly-aluminium chloride (PAC), were also successful in harvesting the studied algal cells. Optimum concentration of aluminium sulphate (AS) could be concluded as 10 ppm with 87.6% recovery and 7.10 CF (v/v) in 30 min for cost-efficient harvesting, whereas for PAC it was 20 ppm with 74% recovery and 6.6 CF (v/v). Fv/Fm yields of concentrated cells with AS and PAC showed a 1% reduction compared to fresh culture. Mg+2 was the triggering ion for alkalinity-induced flocculation in the conditions studied. The rheology behaviour of the concentrated cells was Newtonian with values between 2.2×10(-3) and 2.3×10(-3) Pa s at 30°C.

ACS Style

Sema Şirin; Ester Clavero; Joan Salvadó. Efficient harvesting of Chaetoceros calcitrans for biodiesel production. Environmental Technology 2015, 36, 1902 -1912.

AMA Style

Sema Şirin, Ester Clavero, Joan Salvadó. Efficient harvesting of Chaetoceros calcitrans for biodiesel production. Environmental Technology. 2015; 36 (15):1902-1912.

Chicago/Turabian Style

Sema Şirin; Ester Clavero; Joan Salvadó. 2015. "Efficient harvesting of Chaetoceros calcitrans for biodiesel production." Environmental Technology 36, no. 15: 1902-1912.

Journal article
Published: 01 March 2015 in Fuel Processing Technology
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ACS Style

E. Lorente; X. Farriol; Joan Salvadó. Steam explosion as a fractionation step in biofuel production from microalgae. Fuel Processing Technology 2015, 131, 93 -98.

AMA Style

E. Lorente, X. Farriol, Joan Salvadó. Steam explosion as a fractionation step in biofuel production from microalgae. Fuel Processing Technology. 2015; 131 ():93-98.

Chicago/Turabian Style

E. Lorente; X. Farriol; Joan Salvadó. 2015. "Steam explosion as a fractionation step in biofuel production from microalgae." Fuel Processing Technology 131, no. : 93-98.

Journal article
Published: 01 December 2014 in Ecological Modelling
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ACS Style

Rosa Trobajo; Carles Ibáñez; Ester Clavero; Joan Salvadó; Sven Erik Jørgensen. Modelling the response of microalgae to CO2 addition. Ecological Modelling 2014, 294, 42 -50.

AMA Style

Rosa Trobajo, Carles Ibáñez, Ester Clavero, Joan Salvadó, Sven Erik Jørgensen. Modelling the response of microalgae to CO2 addition. Ecological Modelling. 2014; 294 ():42-50.

Chicago/Turabian Style

Rosa Trobajo; Carles Ibáñez; Ester Clavero; Joan Salvadó; Sven Erik Jørgensen. 2014. "Modelling the response of microalgae to CO2 addition." Ecological Modelling 294, no. : 42-50.

Journal article
Published: 30 July 2014 in Teknos revista científica
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Resumen El biodiesel es un combustible basado en ésteres metílicos de ácidos grasos con numerosas ventajas ambientales. Una de las más importantes es su elevada biodegradabilidad y su habilidad para disolver el petróleo crudo. En este estudio, se prepararon mezclas de petróleo crudo pesado y biodiesel y se midieron las densidades y viscosidades de dichas mezclas con el fin de evaluar la facilidad de recolección de las mismas en una zona afectada por un derrame. Se encontró que la densidad de todas las muestras estaba por debajo de la densidad del agua de mar, lo que indica que estas flotarán en la superficie. La viscosidad de las mezclas fue inferior varios órdenes de magnitud con respecto a la viscosidad del petróleo crudo pesado; esto indica la posibilidad de bombear fácilmente las mismas. Adicionalmente, se estudió la biodegradabilidad de las mezclas mediante el método de evolución de CO2. En todos los casos, la biodegradabilidad se incrementó con la adición del biodiesel y mostró la presencia de efectos sinérgicos debidos a cometabolismo. La mezcla, que contenía 50 % de petróleo crudo, demostró el mayor efecto sinérgico. Finalmente, se plantearon diversas soluciones para el tratamiento de aguas y suelos afectados por un derrame de petróleo crudo pesado.

ACS Style

Jorgelina C. Pasqualino; Joan Salvadó. Uso de biodiesel en la biorremediación de derrames de petróleo crudo. Teknos revista científica 2014, 14, 69 .

AMA Style

Jorgelina C. Pasqualino, Joan Salvadó. Uso de biodiesel en la biorremediación de derrames de petróleo crudo. Teknos revista científica. 2014; 14 (1):69.

Chicago/Turabian Style

Jorgelina C. Pasqualino; Joan Salvadó. 2014. "Uso de biodiesel en la biorremediación de derrames de petróleo crudo." Teknos revista científica 14, no. 1: 69.

Journal article
Published: 04 July 2014 in Journal of Materials Science
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Among different strategies to reduce costs in microalgae dewatering process via cross-flow filtration, the one related to membrane material was investigated in order to be decreased. Several materials were tested, starting with the ones commonly used in membrane technology [ceramic, polysulfone (PSf) and polyacrylonitrile (PAN)] to the ones generally employed in packaging industry [acrylonitrile butadiene styrene (ABS), glycol-modified polyethylene terephthalate (PETG) and polylactic acid (PLA)], the latter being considerably cheaper. Experiments carried out showed promising results in terms of permeabilities for PSf–Pluronic® F127 blended membranes and PAN membranes (11 ± 1 L/h/m2/bar and 22 ± 1 L/h/m2/bar, respectively, instead of 2 ± 2 L/h/m2/bar of PSf membranes), but with high related costs. PLA membranes showed good mechanical properties, biodegradability and price, but low permeability values (5 ± 1 L/h/m2/bar). PETG membranes showed attractive results in terms of costs and permeability, but poor mechanical properties. The polymer that offered the best results was the ABS that reached membrane permeabilities of 19 ± 1 L/h/m2/bar, maintaining good mechanical properties while filtering the microalgae Phaeodactylum tricornutum Bohlin. Thus, a novel functionality was found for these not so common polymers in microalgae dewatering. This indicates that use of these materials could also be considered in other aqueous micro/ultrafiltration applications. In addition, the biodegradable PLA polymer introduces a new concept of cheap and environmental friendly membrane in this application.

ACS Style

Claudia Nurra; Edgar Franco; Maria L. Maspoch; Joan Salvadó; Carles Torras. Cheaper membrane materials for microalgae dewatering. Journal of Materials Science 2014, 49, 7031 -7039.

AMA Style

Claudia Nurra, Edgar Franco, Maria L. Maspoch, Joan Salvadó, Carles Torras. Cheaper membrane materials for microalgae dewatering. Journal of Materials Science. 2014; 49 (20):7031-7039.

Chicago/Turabian Style

Claudia Nurra; Edgar Franco; Maria L. Maspoch; Joan Salvadó; Carles Torras. 2014. "Cheaper membrane materials for microalgae dewatering." Journal of Materials Science 49, no. 20: 7031-7039.

Journal article
Published: 01 July 2014 in Bioresource Technology
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10.1016/j.biortech.2014.04.009A 53m3 microalgae pilot plant with semi-closed photobioreactors has been operated in batch mode at Tarragona, where proper climatic conditions exist. Operations carried-out were microalgae culturing, concentration, cell disruption and lipid extraction. Culturing was performed with and without CO2 fertilization. pH was used to control CO2 dosing. With CO2 fertilization best microalgae concentrations were obtained. Productivities up to 19.9 g/m2/day were reached. Although sedimentation and centrifugation was performed, studies focused on dynamic membrane filtration as improved technique compared with conventional one. Significant fouling reduction was obtained by using a vibrational membrane setup. Cell disruption including product pre-extraction was performed by using steam explosion at moderate conditions, as novel technique for this application. Lipid extraction was performed by using conventional techniques with and without exploded material. The amount of lipids obtained from exploded material was higher than with non-exploded material, which shows that steam explosion provides a clear enhancement. 2014 Elsevier Ltd. All rights reserved

ACS Style

Claudia Nurra; Carles Torras; Ester Clavero; S. Ríos; M. Rey; E. Lorente; X. Farriol; J. Salvadó. Biorefinery concept in a microalgae pilot plant. Culturing, dynamic filtration and steam explosion fractionation. Bioresource Technology 2014, 163, 136 -142.

AMA Style

Claudia Nurra, Carles Torras, Ester Clavero, S. Ríos, M. Rey, E. Lorente, X. Farriol, J. Salvadó. Biorefinery concept in a microalgae pilot plant. Culturing, dynamic filtration and steam explosion fractionation. Bioresource Technology. 2014; 163 ():136-142.

Chicago/Turabian Style

Claudia Nurra; Carles Torras; Ester Clavero; S. Ríos; M. Rey; E. Lorente; X. Farriol; J. Salvadó. 2014. "Biorefinery concept in a microalgae pilot plant. Culturing, dynamic filtration and steam explosion fractionation." Bioresource Technology 163, no. : 136-142.

Journal article
Published: 01 April 2014 in Bioresource Technology
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10.1016/j.biortech.2014.01.115The effect of shear-enhanced filtration by vibratory process in microalgae dewatering is presented in this paper. The aim of this research was to investigate the technical performance and improvement of vibrating membrane filtration compared with conventional tangential cross-flow filtration in microalgae concentration. An industrial-scale available commercial set-up was used. Several membrane materials as polyethersulfone, polyacrylonitrile, etc., and mean pore sizes (from 7000 Da to 0.2 lm) were tested and compared in both filtration set-ups. Experiments were carried-out with Nannochloropsis gaditana and Phaeodactylum tricornutum microalgae. It has been demonstrated that, even if the choice of the membrane depends on its cut-off, its material and the type of microalgae filtrated, dynamic filtration is always the best technology over a conventional one. If with conventional filtration permeability values were in the vicinity of 10 L/h/m2/bar in steady state phase, with dynamic filtration these values increased to 30 L/h/m2/bar or more. 2014 Elsevier Ltd. All rights reserved

ACS Style

Claudia Nurra; Ester Clavero; Joan Salvadó; Carles Torras. Vibrating membrane filtration as improved technology for microalgae dewatering. Bioresource Technology 2014, 157, 247 -253.

AMA Style

Claudia Nurra, Ester Clavero, Joan Salvadó, Carles Torras. Vibrating membrane filtration as improved technology for microalgae dewatering. Bioresource Technology. 2014; 157 ():247-253.

Chicago/Turabian Style

Claudia Nurra; Ester Clavero; Joan Salvadó; Carles Torras. 2014. "Vibrating membrane filtration as improved technology for microalgae dewatering." Bioresource Technology 157, no. : 247-253.

Journal article
Published: 01 November 2013 in Bioresource Technology
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10.1016/j.biortech.2013.07.145Microalgae-based biodiesel has several benefits over other resources such as less land use, potential cultivation in non-fertile locations, faster growth and especially a high lipid-to-biodiesel yield. Nevertheless, the environmental and economic behavior for high scale production depends on several variables that must be addressed in the scale-up procedure. In this sense, rigorous modeling and multicriteria evaluation are performed in order to achieve optimal topology for third generation biodiesel production. Different scenarios and the most promising technologies tested at pilot scale are assessed. Besides, the sensitivity analysis allows the detection of key operating variables and assumptions that have a direct effect on the lipid content. The deviation of these variables may lead to an erroneous estimation of the scale-up performance of the technology reviewed in the microalgae-based biodiesel process. The modeling and evaluation of different scenarios of the harvesting, oil extraction and transesterification help to identify greener and cheaper alternatives

ACS Style

Carmen M. Torres; Sergio D. Ríos; Carles Torras; Joan Salvadó; Josep M. Mateo-Sanz; Laureano Jiménez. Microalgae-based biodiesel: A multicriteria analysis of the production process using realistic scenarios. Bioresource Technology 2013, 147, 7 -16.

AMA Style

Carmen M. Torres, Sergio D. Ríos, Carles Torras, Joan Salvadó, Josep M. Mateo-Sanz, Laureano Jiménez. Microalgae-based biodiesel: A multicriteria analysis of the production process using realistic scenarios. Bioresource Technology. 2013; 147 ():7-16.

Chicago/Turabian Style

Carmen M. Torres; Sergio D. Ríos; Carles Torras; Joan Salvadó; Josep M. Mateo-Sanz; Laureano Jiménez. 2013. "Microalgae-based biodiesel: A multicriteria analysis of the production process using realistic scenarios." Bioresource Technology 147, no. : 7-16.

Journal article
Published: 01 September 2013 in Fuel
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ACS Style

Carmen M. Torres; Sergio D. Ríos; Carles Torras; Joan Salvadó; Josep Maria Mateo-Sanz; Laureano Jiménez. Sustainability analysis of biodiesel production from Cynara Cardunculus crop. Fuel 2013, 111, 535 -542.

AMA Style

Carmen M. Torres, Sergio D. Ríos, Carles Torras, Joan Salvadó, Josep Maria Mateo-Sanz, Laureano Jiménez. Sustainability analysis of biodiesel production from Cynara Cardunculus crop. Fuel. 2013; 111 ():535-542.

Chicago/Turabian Style

Carmen M. Torres; Sergio D. Ríos; Carles Torras; Joan Salvadó; Josep Maria Mateo-Sanz; Laureano Jiménez. 2013. "Sustainability analysis of biodiesel production from Cynara Cardunculus crop." Fuel 111, no. : 535-542.

Journal article
Published: 01 May 2013 in Bioresource Technology
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Microalgae oil has been identified as a reliable resource for biodiesel production due to its high lipid productivity and potential cultivation in non-fertile locations. However, high scale production of microalgae based biodiesel depends on the optimization of the entire process to be economically feasible. The selected strain, medium, harvesting methods, etc., sorely affects the ash content in the dry biomass which have a direct effect in the lipid content. Moreover, the suitable lipids for biodiesel production, some of the neutral/saponifiable, are only a fraction of the total ones (around 30% dry base biomass in the best case). The present work uses computational tools for the modeling of different scenarios of the harvesting, oil extraction and transesterification. This rigorous modeling approach detects process bottlenecks that could have led to an overestimation of the potentiality of the microalgae lipids as a resource for the biodiesel production.

ACS Style

Sergio D. Ríos; Carmen M. Torres; Carles Torras; Joan Salvadó; Josep M. Mateo-Sanz; Laureano Jiménez. Microalgae-based biodiesel: Economic analysis of downstream process realistic scenarios. Bioresource Technology 2013, 136, 617 -625.

AMA Style

Sergio D. Ríos, Carmen M. Torres, Carles Torras, Joan Salvadó, Josep M. Mateo-Sanz, Laureano Jiménez. Microalgae-based biodiesel: Economic analysis of downstream process realistic scenarios. Bioresource Technology. 2013; 136 ():617-625.

Chicago/Turabian Style

Sergio D. Ríos; Carmen M. Torres; Carles Torras; Joan Salvadó; Josep M. Mateo-Sanz; Laureano Jiménez. 2013. "Microalgae-based biodiesel: Economic analysis of downstream process realistic scenarios." Bioresource Technology 136, no. : 617-625.

Journal article
Published: 01 March 2013 in Bioresource Technology
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We compared potential pre-concentration techniques for Nannochloropsis gaditana (Nng) by testing natural sedimentation; flocculation with aluminium sulphate, polyaluminium chloride and chitosan; and induced pH. Promising flocculation efficiencies and concentration factors were obtained in a short time with alkalinity-induced flocculation at an adjusted pH of 9.7 and with chitosan at an adjusted pH of 9.9 using a concentration of 30mgL(-1). The sedimentation rates of alkalinity-induced flocculation were also evaluated. Additionally, viscosity, particle size distribution and Ca/Mg ions were analysed for pre-concentrated samples of N. gaditana (Nng) and the previously studied Phaeodactylum tricornutum (Pht) which were obtained by various different harvesting methods under optimal conditions. The rheological properties of the concentrated algae suspensions of two microalgal species showed Newtonian behaviour. The mean diameters of the flocs were between 39 and 48μm. The Ca/Mg analysis showed that Mg(+2) is the triggering ion for alkalinity-induced flocculation in the conditions studied.

ACS Style

Sema Şirin; Ester Clavero; Joan Salvadó. Potential pre-concentration methods for Nannochloropsis gaditana and a comparative study of pre-concentrated sample properties. Bioresource Technology 2013, 132, 293 -304.

AMA Style

Sema Şirin, Ester Clavero, Joan Salvadó. Potential pre-concentration methods for Nannochloropsis gaditana and a comparative study of pre-concentrated sample properties. Bioresource Technology. 2013; 132 ():293-304.

Chicago/Turabian Style

Sema Şirin; Ester Clavero; Joan Salvadó. 2013. "Potential pre-concentration methods for Nannochloropsis gaditana and a comparative study of pre-concentrated sample properties." Bioresource Technology 132, no. : 293-304.