WorldCat Identities

Puig, Sebastià

Overview
Works: 4 works in 5 publications in 1 language and 61 library holdings
Roles: Editor, Opponent, Other
Classifications: TD353, 363.61
Publication Timeline
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Most widely held works by Sebastià Puig
Microbial Synthesis, Gas-Fermentation and Bioelectroconversion of CO2 and other Gaseous Streams by Andrea Schievano( )

1 edition published in 2019 in English and held by 34 WorldCat member libraries worldwide

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact
Environmental technologies for the sustainable development of the water and energy sectors( )

2 editions published in 2020 in English and held by 25 WorldCat member libraries worldwide

Microbial electrochemical snorkel for nitrate reduction in constructed wetlands by Joanna Maria Roginska( )

1 edition published in 2021 in English and held by 1 WorldCat member library worldwide

The exceeded nitrate concentration in water is caused by the use of nitrogen fertilizers in agriculture and may result in negative environmental consequences. One of the solutions are constructed wetlands - wastewater treating engineered systems. However, this approach might not be fast enough, especially in periods when nitrate concentration is high and in not sufficiently big wetlands. This thesis is exploring strategies for accelerating nitrate reduction. The denitrification requires an electron donor, such as organic carbon. These compounds appear more in the sediment, while nitrate is present in water, hence we hypothesized that increasing the sediment/water interface will facilitate the access to electron donors and accelerate denitrification, and we evaluated this in the first part of this work. Other strategy to increase this interface was to implement a bioelectrochemical system (BES) with nitrate-reducing biocathode. The BES we studied is a Microbial Electrochemical Snorkel (MES), which consists of one piece of electrode immersed in two different media, here in sediment and water. On the part in sediment an anodic biofilm is developed, which is oxidizing the organic matter. The electrons are then transported to the part of electrode in water, where the cathodic biofilm grows and the reduction of oxygen or nitrate process occurs.This work aims to create the conditions for developing MES with nitrate-reducing biocathodic part and to characterize its electrochemical properties, microbial community and nitrate reduction efficiency. A literature review about the nitrate-reduction biocathodes is provided in Chapter 1. Chapter 2 describes the materials and methods used in this work. Chapter 3 explores the effect of increasing the water/sediment interface on nitrate reduction. To increase this interface, sediment was arranged vertically in the tubes made of water-permeable tissue. This experiment was first performed in stationary state and by increasing the interface area 10 times, the nitrate reduction was increased up to 6.5 times. The volume of the sediment, its origin and composition, did not have a significant influence on nitrate reduction. This experiment was later repeated in flow, which resulted in 3.5 times faster nitrate reduction, stable for 53 days. The scenario of applying this method in the constructed wetland is considered.Chapter 4 covers the preliminary studies of MES: the choice of electrode materials and the ratio between part in water and sediment. The development of MES is confirmed by electrochemical analysis and study of microbial community. The addition of nitrate caused the increase of cathodic current and shift of potential. The laboratory results were compared with the results on the field.Next, MES of increased size and optimized distribution between sediment and water was built (Chapter 5), which confirmed the improvement in nitrate reduction. An increase of cathodic current was observed after addition of nitrate, and it decreased after nitrate was reduced. This current was linked to electron transfer reaction occurring at relatively high potentials when compared to the literature. Microbial analysis showed the significant differences between the community on biocathodes and in sediment and water.The final chapter is exploring potential role of electrodes in sediments for accelerating nitrate removal. It was implemented by integrating electrode in vertical sediment tubes that were studied in Chapter 3. Stainless steel and carbon felt electrodes were tested, and the latter caused indeed fast nitrate reduction. However, additional experiments showed that the mechanism is not nitrate reduction on the electrode. Carbon felt in sediment caused the release of species and the rapid nitrate reduction occurring in water. Changing the water eliminated the advantage in nitrate reduction. But, clear electrochemical reaction could still be observed at the electrode in sediment after nitrate addition
Role of Operating Conditions on Energetic Pathways in a Microbial Fuel Cell( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Abstract: The electric performance of a Microbial Fuel Cell (MFC) fed with swine manure, and specifically the interactions between different coexisting bacterial populations are examined in relationship to the Organic Loading Rate (OLR) and External Resistance applied to the cell. Feasibility of swine manure treatment using MFCs was already demonstrated by previous studies, however low Coulombic efficiencies were attained due to a competing methanogenic degradation occurring in the same cells. External resistance (Rext) and Organic Loading Rate have been identified as two of the key parameters affecting the balance between exoelectrogenic and methanogenic bacterial populations in a MFC system; despite this, virtually no attention had been paid to the study of OLR influence on MFCs performance. This study evaluates the performance of a MFC, treating swine manure, in this perspective, demonstrating that high OLRs (up to 11.2 kg COD m 3 /d) have a limiting effect on MFCs electrochemical losses, and increase absolute values of ORR (4.6 kg COD m 3 /d) and current production (14.9 mA). On the other hand, adoption of low OLR (as low as 0.7 kg COD m 3 /d) translates in an increase of both organic matter removal efficiency (52%) and Coulombic efficiency (higher than 70%). These improvements can be directly connected with the shifting balance between exoelectrogenic and methanogenic biomass populations, as confirmed by the cell's anode off-gas analysis. Hence, by adopting the appropriate design value of ORL and operating conditions, the MFC's biofilm exoelectrogenic population fraction, and thus its overall activity, can be improved considerably
 
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Environmental technologies for the sustainable development of the water and energy sectors
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