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Author Martinez, C.; Briones, F.; Aguilar, C.; Araya, N.; Iturriza, I.; Machado, I.; Rojas, P.
Title Effect of hot pressing and hot isostatic pressing on the microstructure, hardness, and wear behavior of nickel Type
Year 2020 Publication Materials Letters Abbreviated Journal Mater. Lett.
Volume 273 Issue Pages 127944
Keywords MECHANICAL-PROPERTIES; RESISTANCE; NANO
Abstract Nanocrystalline Ni (Ni-nc) obtained by mechanical milling may present improved mechanical properties paired with high abrasion resistance. Different sintering processes were used to consolidate Nanocrystaline Ni: hot pressed (HP) and hot-isostatic pressed (HIP). The microstructure, mechanical properties, and tribological were evaluated to compare the processes. X-ray diffraction patterns showed that HIP-consolidated specimens had larger crystallite sizes and 37% less microstrain when compared to the HP specimens. The nanohardness of the HIP specimens was also carried out and it was 50% lower than that of HP specimens, whereas its coefficient of friction found was 25% higher. These results show the advantages of the HP process over the HIP since the high pressure. The low sintering temperature of HP inhibited the grain growth, which leads excellent mechanical and tribological properties of Ni. (C) 2020 Elsevier B.V. All rights reserved.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0167-577X ISBN Medium
Area Expedition Conference
Notes WOS:000538775300023 Approved
Call Number UAI @ alexi.delcanto @ Serial 1403
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Author Moreno, R.; Bezerra, B.; Rudnick, H.; Suazo-Martinez, C.; Carvalho, M.; Navarro, A.; Silva, C.; Strbac, G.
Title Distribution Network Rate Making in Latin America Type
Year 2020 Publication Ieee Power & Energy Magazine Abbreviated Journal IEEE Power Energy Mag.
Volume 18 Issue 3 Pages 33-48
Keywords
Abstract Following the trend observed in developed economies, various Latin American governments are committed to reducing greenhouse gas emissions, particularly in the power sector. In countries such as Chile, Peru, Colombia, Brazil, and Mexico, various regulatory policies have been issued to meet renewable-generation integration targets and satisfy the increasing demand from consumers for supply quality. Meanwhile, the integration of distributed generation (DG) in rural and urban areas as well as the increasing need to integrate electric vehicles (EVs) in urban areas are driving important reforms in the distribution sector.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1540-7977 ISBN Medium
Area Expedition Conference
Notes WOS:000619161600001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1334
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Author Goles, E.; Mascareno, A.; Medina, P.; Rica, S.
Title Migration-induced transition in social structures: a view through the Sakoda model of social interactions Type
Year 2020 Publication Scientific Reports Abbreviated Journal Sci. Rep.
Volume 10 Issue 1 Pages 18338
Keywords
Abstract We study the dynamics of three populations evolving in a two-dimensional discrete grid according to rules of attraction, rejection, or indifference following the framework of the seminal model by Sakoda and we apply it to migration phenomena. An interesting feature of the Sakoda model is the existence of a Potts-like energy which, as a common principle, decreases as time passes by. Here we consider the evolution of two populations until stabilization, then, we perturb this attractor by the inclusion of a third arrival: the immigrants. We show the conditions under which this irruption does not alter significantly the previous attractor (a sociological morphostatic behaviour) or it is dramatically changed (morphogenetic behaviour). We observe empirically that for a morphostatic behaviour the energy decreases while for morphogenesis this energy increases, revealing an escalation of social tension.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2045-2322 ISBN Medium
Area Expedition Conference
Notes WOS:000615371300017 Approved
Call Number UAI @ alexi.delcanto @ Serial 1330
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Author Goles, E.; Lobos, F.; Montealegre, P.; Ruivo, ELP.; de Oliveira, PPB.
Title Computational Complexity of the Stability Problem for Elementary Cellular Automata Type
Year 2020 Publication Journal of Cellular Automata Abbreviated Journal J. Cell. Autom.
Volume 15 Issue 4 Pages 261-304
Keywords One-dimensional cellular automata; elementary cellular automata; computational complexity; stability problem; decision problem
Abstract Given an elementary cellular automaton and a cell v, we define the stability decision problem as the determination of whether or not the state of cell v will ever change, at least once, during the time evolution of the rule, over a finite input configuration. Here, we perform the study of the entire elementary cellular automata rule space, for the two possible decision cases of the problem, namely, changes in v from state 0 to 1 (0 -> 1), and the other way round (1 -> 0). Out of the 256 elementary cellular automata, we show that for all of them, at least one of the two decision problems is in the NC complexity class.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1557-5969 ISBN Medium
Area Expedition Conference
Notes WOS:000613086900002 Approved
Call Number UAI @ alexi.delcanto @ Serial 1329
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Author Adamatzky, A.; Goles, E.; Martinez, GJ.; Tsompanas, MA.; Tegelaar, M.; Wosten, HAB.
Title Fungal Automata Type
Year 2020 Publication Complex Systems Abbreviated Journal Complex Syst.
Volume 29 Issue 4 Pages 759-778
Keywords fungi; ascomycete; Woronin body; cellular automata
Abstract We study a cellular automaton (CA) model of information dynamics on a single hypha of a fungal mycelium. Such a filament is divided in compartments (here also called cells) by septa. These septa are invaginations of the cell wall and their pores allow for the flow of cytoplasm between compartments and hyphae. The septal pores of the fungal phylum of the Ascomycota can be closed by organelles called Woronin bodies. Septal closure is increased when the septa become older and when exposed to stress conditions. Thus, Woronin bodies act as informational flow valves. The one-dimensional fungal automaton is a binary-state ternary neighborhood CA, where every compartment follows one of the elementary cellular automaton (ECA) rules if its pores are open and either remains in state 0 (first species of fungal automata) or its previous state (second species of fungal automata) if its pores are closed. The Woronin bodies closing the pores are also governed by ECA rules. We analyze a structure of the composition space of cell-state transition and pore-state transition rules and the complexity of fungal automata with just a few Woronin bodies, and exemplify several important local events in the automaton dynamics.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0891-2513 ISBN Medium
Area Expedition Conference
Notes WOS:000604844500002 Approved
Call Number UAI @ alexi.delcanto @ Serial 1319
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Author Baudin, K.; Fusaro, A.; Krupa, K.; Garnier, J.; Rica, S.; Millot, G.; Picozzi, A.
Title Classical Rayleigh-Jeans Condensation of Light Waves: Observation and Thermodynamic Characterization Type
Year 2020 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.
Volume 125 Issue 24 Pages 244101
Keywords
Abstract Theoretical studies on wave turbulence predict that a purely classical system of random waves can exhibit a process of condensation, which originates in the singularity of the Rayleigh-Jeans equilibrium distribution. We report the experimental observation of the transition to condensation of classical optical waves propagating in a multimode fiber, i.e., in a conservative Hamiltonian system without thermal heat bath. In contrast to conventional self-organization processes featured by the nonequilibrium formation of nonlinear coherent structures (solitons, vortices, ...), here the self-organization originates in the equilibrium Rayleigh-Jeans statistics of classical waves. The experimental results show that the chemical potential reaches the lowest energy level at the transition to condensation, which leads to the macroscopic population of the fundamental mode of the optical fiber. The near-field and far-field measurements of the condensate fraction across the transition to condensation are in quantitative agreement with the Rayleigh-Jeans theory. The thermodynamics of classical wave condensation reveals that the heat capacity takes a constant value in the condensed state and tends to vanish above the transition in the normal state. Our experiments provide the first demonstration of a coherent phenomenon of self-organization that is exclusively driven by optical thermalization toward the Rayleigh-Jeans equilibrium.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9007 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1318
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Author Mellado, P.
Title Timescales in the thermal dynamics of magnetic dipolar clusters Type
Year 2020 Publication Physical Review B Abbreviated Journal Phys. Rev. B
Volume 102 Issue 21 Pages 214442
Keywords ARTIFICIAL SPIN ICE; RELAXATION; FRACTIONALIZATION; FRUSTRATION; GLASSES; PHYSICS; PHASE; MODEL
Abstract The collective behavior of thermally active structures offers clues on the emergent degrees of freedom and the physical mechanisms that determine the low-energy state of a variety of systems. Here, the thermally active dynamics of magnetic dipoles at square plaquettes is modeled in terms of Brownian oscillators in contact with a heat bath. Solution of the Langevin equation for a set of interacting x-y dipoles allows the identification of the timescales and correlation length that reveal how interactions, temperature, damping, and inertia may determine the frequency modes of edge and bulk magnetic mesospins in artificial dipolar systems.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2469-9950 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1316
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Author Golovach, P.A.; Heggernes, P.; Lima, P.T.; Montealegre, P.
Title Finding Connected Secluded Subgraphs Type
Year 2020 Publication 12th International Symposium on Parameterized and Exact Computation Abbreviated Journal IPEC 2017
Volume 89 Issue 18 Pages 1-13
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1868-8969 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1314
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Author Seccatore, J.; Gonzalez, P.; Herrera, M.
Title Peculiarities of drilling and blasting in underground small-scale mines. Type
Year 2020 Publication REM – International Engineering Journal Abbreviated Journal REM
Volume 73 Issue 3 Pages
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2448-167X ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1312
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Author Espinoza, C.; Seccatore, J.; Herrera, M.
Title Chilean artisanal mining: a gambling scenario Type
Year 2020 Publication REM – International Engineering Journal Abbreviated Journal REM
Volume 73 Issue 2 Pages
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2448-167X ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1311
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Author Livshits, E.; Bertossi, L.; Kimefeld, B.; Sebag, M.
Title The Shapley Value of Tuples in Query Answering Type
Year 2020 Publication 23rd International Conference on Database Theory (ICDT 2020) Abbreviated Journal ICDT 2020
Volume 155 Issue 20 Pages 1-19
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1868-8969 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1310
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Author Bertossi, L.; Li, J.; Schleich, M.; Suciu, D.; Vagena, Z.
Title Causality-based Explanation of Classification Outcomes Type
Year 2020 Publication DEEM'20: Proceedings of the Fourth International Workshop on Data Management for End-to-End Machine Learning Abbreviated Journal DEEM 2020
Volume 6 Issue Pages 1-10
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN 9781450380232 Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1309
Permanent link to this record
 

 
Author Bertossi, L.; Geerts, F.
Title Data Quality and Explainable AI Type
Year 2020 Publication Acm Journal Of Data And Information Quality Abbreviated Journal ACM J. Data Inf. Qual.
Volume 12 Issue 2 Pages 11
Keywords Machine learning; causes; fairness; bias
Abstract In this work, we provide some insights and develop some ideas, with few technical details, about the role of explanations in Data Quality in the context of data-based machine learning models (ML). In this direction, there are, as expected, roles for causality, and explainable artificial intelligence. The latter area not only sheds light on the models, but also on the data that support model construction. There is also room for defining, identifying, and explaining errors in data, in particular, in ML, and also for suggesting repair actions. More generally, explanations can be used as a basis for defining dirty data in the context of ML, and measuring or quantifying them. We think dirtiness as relative to the ML task at hand, e.g., classification.
Address [Bertossi, Leopoldo] Univ Adolfo Ibanez, Fac Engn & Sci, Santiago, Chile, Email: leopoldo.bertossi@uai.cl;
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1936-1955 ISBN Medium
Area Expedition Conference
Notes WOS:000582595600005 Approved
Call Number UAI @ eduardo.moreno @ Serial 1308
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Author Prieto, P.; Bride, J.C.; Beghelli, A.; Canessa, E.; Barra, C.
Title I like it elegant: imprinting personalities into product shapes Type
Year 2020 Publication International Journal of Design Creativity and Innovation Abbreviated Journal Int. J. Des. Creativity Innov.
Volume 8 Issue 1 Pages 5-20
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2165-0349 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ eduardo.moreno @ Serial 1307
Permanent link to this record
 

 
Author Schlecker, M.; Kossakowski, D.; Brahm, R.; Espinoza, N.; Henning, T.; Carone, L.; Molaverdikhani, K.; Trifonov, T.; Molliere, P.; Hobson, MJ.; Jordan, A.; Rojas, FI.; Klahr, H.; Sarkis, P.; Bakos, GA.; Bhatti, W.; Osip, D.; Suc, V.; Ricker, G.; Vanderspek, R.; Latham, DW.; Seager, S.; Winn, JN.; Jenkins, JM.; Vezie, M.; Villasenor, JN.; Rose, ME.; Rodriguez, DR.; Rodriguez, JE.; Quinn, SN.; Shporer, A.
Title A highly eccentric warm jupiter orbiting TIC 237913194 Type
Year 2020 Publication Astronomical Journal Abbreviated Journal Astron. J.
Volume 160 Issue 6 Pages 275
Keywords Exoplanet astronomy; Transit photometry; Radial velocity; Exoplanet dynamics; Exoplanet atmospheres; Exoplanet structure; Hot Jupiters; Extrasolar gas giants
Abstract The orbital parameters of warm Jupiters serve as a record of their formation history, providing constraints on formation scenarios for giant planets on close and intermediate orbits. Here, we report the discovery of TIC.237913194b, detected in full-frame images from Sectors 1 and 2 of the Transiting Exoplanet Survey Satellite (TESS), ground-based photometry (Chilean-Hungarian Automated Telescope, Las Cumbres Observatory Global Telescope), and Fiber-fed Extended Range Optical Spectrograph radial velocity time series. We constrain its mass to M-P = 1.942(-0.091)(+0.091) M-J and its radius to R-P = 1.117(-0.047)(+0.054) R-J, implying a bulk density similar to Neptune's. It orbits a G-type star (M-* = 1.026(-0.055)(+0.057) M-circle dot, V = 12.1 mag) with a period of 15.17 days on one of the most eccentric orbits of all known warm giants (e approximate to 0.58). This extreme dynamical state points to a past interaction with an additional, undetected massive companion. A tidal evolution analysis showed a large tidal dissipation timescale, suggesting that the planet is not a progenitor for a hot Jupiter caught during its high-eccentricity migration. TIC.237913194b further represents an attractive opportunity to study the energy deposition and redistribution in the atmosphere of a warm Jupiter with high eccentricity.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0004-6256 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1286
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Author Crutchik, D.; Rodriguez-Valdecantos, G.; Bustos, G.; Bravo, J.; Gonzalez, B.; Pabon-Pereira, C.
Title Vermiproductivity, maturation and microbiological changes derived from the use of liquid anaerobic digestate during the vermicomposting of market waste Type
Year 2020 Publication Water Science and Technology Abbreviated Journal Water Sci. Technol.
Volume 82 Issue 9 Pages 1781-1794
Keywords anaerobic digestion; digestate; market waste; microbial community; residues valorization; vermicomposting
Abstract Recently, it has been suggested that the liquid fraction of anaerobic digestate, derived from the treatment of wastewater and solid wastes, could be used in vermicomposting as a solution to its disposal, and even for its valorization. Nevertheless, the literature does not provide enough information about its impact on the process of vermicomposting itself and on the final quality of the end-product. In this study, the effect of different doses of digestate in the vermicomposting process treating market waste is assessed measuring earthworm population dynamics, the bacterial community succession present in the vermibeds, as well as maturation and the end-quality of the vermicompost. Our results show that the addition of liquid digestate to the vermibeds increased the earthworms biomass, i.e. 71%, 94% and 168% in control, and vermibeds with 30% and 60% digestate, respectively. Further, the increase in the amount of N in the vermicompost decreased as the digestate addition increased, i.e. 75%, 8%, 3%. The maturity achieved was high in all treatments as shown by the C/N ratio, 7.98, 7.40 and 10.20, and the high seed germination rate, above 90%. Finally, the succession of the microbial community was not disturbed and compositional stabilization was reached after 92 days.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ WOS:000595253000005 Serial 1285
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Author Gonzalez, HA.; Puhm, A,; Rojas, F.
Title Loop corrections to celestial amplitudes Type
Year 2020 Publication Physical Review D Abbreviated Journal Phys. Rev. D.
Volume 102 Issue Pages 126027
Keywords Conformal field theory; Large-N expansion in field theory; Non-Abelian gauge theories; Perturbation theory; Scattering amplitudes; Supersymmetric models
Abstract We study the effect of loop corrections to conformal correlators on the celestial sphere at null infinity. We first analyze finite one-loop celestial amplitudes in pure Yang-Mills theory and Einstein gravity. We then turn to our main focus: infrared divergent loop amplitudes in planar N=4

super–Yang-Mills theory. We compute the celestial one-loop amplitude in dimensional regularization and show that it can be recast as an operator acting on the celestial tree-level amplitude. This extends to any loop order, and the resummation of all planar loops enables us to write down an expression for the all-loop celestial amplitude. Finally, we show that the exponentiated all-loop expression given by the Bern-Dixon-Smirnov (BDS) formula gets promoted on the celestial sphere to an operator acting on the tree-level conformal correlation function, thus yielding, the celestial BDS formula.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2470-0010 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1282
Permanent link to this record
 

 
Author Reus, L.
Title English as a medium of instruction at a Chilean engineering school: Experiences in finance and industrial organization courses Type
Year 2020 Publication Studies in Educational Evaluation Abbreviated Journal Stud. Educ. Eval.
Volume 67 Issue Pages 100930
Keywords EMI; EFL; Chilean education; Finance education; Internationalization
Abstract Implementing English as a medium of instruction (EMI) in Latin American countries contributes to reducing language exchange isolation in the region and helps prepare higher education students for future labor opportunities. However, one of the main concerns around EMI is whether English instruction could negatively affect content acquisition. This paper examines if the performance of native Spanish speakers is affected by EMI. Specifically, it discusses experiences from finance and industrial organization courses given to industrial engineers at a Chilean university. The results of a multivariate analysis of tests and final grades show that performance differences can mainly be attributed to students� performance in previous courses; only on rare occasions do language, gender, and attendance explain performance differences.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0191-491X ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1280
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Author Mondschein, S.; Quinteros, M.; Yankovic, N.
Title Gender bias in the Chilean public health system: Do we all wait the same? Type
Year 2020 Publication Plos One Abbreviated Journal Plos One
Volume 15 Issue 9 Pages e0239445
Keywords Sex
Abstract Background

In 2002, Chile introduced a major health reform, designed to level out inequities in healthcare coverage, access and opportunities. In particular, the opportunity guarantees ensure a maximum time to receive the appropriate diagnosis and treatment, and thus, gender bias should not be observed.

Objective

To explore the existence of differences in the timeliness of treatment between women and men under the Chilean public health insurance system. We controlled by other observable variables, including age, insurance holder status, provider complexity and health district.

Methods

We used an individual level database that includes all interactions for the diseases covered under the national plan from 2014 to 2019. We excluded from the analysis the diseases affecting only men, women, and infants. To study the waiting time differences between women and men, we first perform a Welch two sample t-test. Then, we used a multilevel hierarchical regression model to further explore the impact of gender in waiting time. At the individual level, we included gender, insurance holder status, age, and the interaction between gender and age. For the aggregate levels, we used the specific opportunity guarantee, the type of provider, and health district.

Results

From the Welch two sample t-test, we found significant differences in waiting times between women and men, in seven opportunity guarantees. From the multilevel regression, the individual variables: holder status, ages between 35 and 49, and the interaction between gender and age for ages between 40 and 54 were statistically significant at 95% level. We remark that the major differences in waiting times between women and men were observed for individuals between ages from 40 to 54, with women waiting significantly longer.

Conclusion

Results show the existence of bias in the timeliness of treatment, proving that universal guarantees are not enough to reduce gender inequalities in health care.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1932-6203 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1279
Permanent link to this record
 

 
Author Crutchik, D.; Rodriguez-Valdecantos, G.; Bustos, G.; Bravo, J.; Gonzalez, B.; Pabon-Pereira, C.
Title WATER SCIENCE AND TECHNOLOGY Type
Year 2020 Publication Abbreviated Journal Water Sci. Technol.
Volume 82 Issue 9 Pages 1781-1794
Keywords anaerobic digestion; digestate; market waste; microbial community; residues valorization; vermicomposting
Abstract Recently, it has been suggested that the liquid fraction of anaerobic digestate, derived from the treatment of wastewater and solid wastes, could be used in vermicomposting as a solution to its disposal, and even for its valorization. Nevertheless, the literature does not provide enough information about its impact on the process of vermicomposting itself and on the final quality of the end-product. In this study, the effect of different doses of digestate in the vermicomposting process treating market waste is assessed measuring earthworm population dynamics, the bacterial community succession present in the vermibeds, as well as maturation and the end-quality of the vermicompost. Our results show that the addition of liquid digestate to the vermibeds increased the earthworms biomass, i.e. 71%, 94% and 168% in control, and vermibeds with 30% and 60% digestate, respectively. Further, the increase in the amount of N in the vermicompost decreased as the digestate addition increased, i.e. 75%, 8%, 3%. The maturity achieved was high in all treatments as shown by the C/N ratio, 7.98, 7.40 and 10.20, and the high seed germination rate, above 90%. Finally, the succession of the microbial community was not disturbed and compositional stabilization was reached after 92 days.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0273-1223 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1278
Permanent link to this record