logo

Group of Environmental Biotechnology

Universidade de Santiago de Compostela

Universidade de Santiago de Compostela Campus Vida Cretus
logo

Group of Environmental Biotechnology

Universidade de Santiago de Compostela

You are here

Publications

2018

Fresh milk supply through vending machines: Consumption patterns and associated environmental impacts
Authors-Ext: Ángeles Pereira, Xavier Vence
Magazine/book: Sustainable Production and Consumption
Volume: 15
Pages: 119-130
Date of publication: 01/07/2018
Publishing house: Elsevier
ISBN: ISSN: 2352-5509
DOI: link
Integrating urban metabolism material flow analysis and life cycle assessment in the environmental evaluation of Santiago de Compostela
Authors-Ext: García-Guaita, F., Villanueva-Rey, P.
Magazine/book: Sustainable Cities and Society
Volume: 40
Pages: 569-580
Date of publication: 01/07/2018
Publishing house: Elsevier
ISBN: ISSN: 2210-6707
Impact Index: 3.07
DOI: link
Education of chemical engineering in Spain: A global picture
Authors-Ext: Raquel Ibañez, Javier Herguido, PedroPartal, MontserratTobajas, Julia Sèmpere, María FernandaLópez-Pérez, Maria J.Rivero
Magazine/book: Education for Chemical Engineers
Volume: 24
Pages: 27-31
Date of publication: 01/07/2018
Publishing house: Elsevier
ISBN: ISSN: 1749-7728
DOI: link

Abstract

The general framework of the Chemical Engineering studies in Spain includes the Bachelor's Degree (4 years), Master's Degree (the most common duration is 1.5 years) and Doctorate (3-4 years). In 2008, the Conference of Directors and Deans of Chemical Engineering (CODDIQ) was constituted with the main objective of promoting and improving the quality of Chemical Engineering studies in Spain. Currently, Faculties and Schools of 29 Spanish universities are members of CODDIQ. An analysis of the most characteristic indicators provides a representative radiography of the Chemical Engineering Studies in Spain, whose most outstanding data are: (i) 7,396 undergraduate students, 1,014 Master students and 556 PhD students, (ii) according to the gender profile of undergraduates and graduates, the percentage of women is similar to that of men, while for faculty staff, the percentage of women is 43% and 46% for Associate and Assistant Professor (respectively) and 23% for the category of Full Professor category; (iii) after completing the Bachelor studies, most of them continue their training in the MSc in Chemical Engineering, (iv) the employability after obtaining the Master's degree is very high (>75%), which in the case of PhDs is close to 100%. The studies of Chemical Engineering in Spain have a very direct relationship with society, especially in the chemical, environmental, biotechnological and energy fields. The companies that collaborate in the training of future professionals are distributed throughout the national territory, which allows a strong connection with the socioeconomic environment.

A simplified approach to determine the carbon footprint of a region: Key learning points from a Galician study
Authors: Almudena Hospido
Authors-Ext: Laura Roibás, Eléonore Loiseau
Magazine/book: Journal of Environmental Management
Volume: 217
Pages: 832-844
Date of publication: 01/07/2018
Publishing house: Elsevier
ISBN: ISSN: 0301-4797
Impact Index: 4.01
DOI: link
Life cycle assessment of management alternatives for sludge from sewage treatment plants in Chile: does advanced anaerobic digestion improve environmental performance compared to current practices?
Authors: Almudena Hospido
Authors-Ext: Javier Cartes, Patricio Neumann, Gladys Vidal
Magazine/book: Journal of Material Cycles and Waste Management
Volume: 20
Issue: 3
Pages: 1530–1540
Date of publication: 01/07/2018
Publishing house: Springer
On the feasibility and interest of applying territorial Life Cycle Assessment to determine subnational normalisation factors
Authors-Ext: Eléonore Loiseau
Magazine/book: Science of the Total Environment
Volume: 626
Pages: 1086–1099
Date of publication: 01/07/2018
Publishing house: Elsevier
ISBN: ISSN: 0048-9697
Impact Index: 4.90
DOI: link
Abstract

Normalisation is an optional step in Life Cycle Assessment (LCA), often used in decision making since it helps interpreting the results of LCA studies with regard to some reference information. The applicable ISO standard recommends considering different reference systems to guarantee the robustness of the normalisation step, and so the availability of different normalisation datasets becomes of high relevance. Life Cycle Impact Assessment (LCIA) methods provide normalisation factors (NFs) for global and regional areas, but no NFs are proposed for smaller areas such as local or subnational scales. The aim of this paper is to evaluate the feasibility of using territorial LCA approach to determine subnational NFs. Normalisation datasets for both Galician (NW Spain) production and consumption activities have been calculated considering a life cycle perspective. In addition to this, the normalisation datasets calculated for Galicia have been used to evaluate two food products produced and/or consumed in the region as case studies. Then, the normalised results have been compared to those obtained using different reference systems (Europe and the World), calculated following the same methodology (ReCiPe). A qualitative uncertainty analysis of the NFs has been carried out, and the usefulness of territorial LCA to determine them has been discussed. It was concluded that territorial LCA is a promising way to determine NFs but that some improvements could be made, which have also been pointed out here.

Assessing the sustainability of Spanish cities considering environmental and socio-economic indicators
Authors-Ext: Rocío Manteiga
Magazine/book: Journal of Cleaner Production
Volume: 178
Pages: 599-610
Date of publication: 20/05/2018
Publishing house: Elsevier
ISBN: ISSN: 0959-6526
DOI: link
Abstract

The conception of urban metabolism has considered the perspective of environmental sustainability in the framework of cities. In this context, cities can be regarded complex entities driven by material and energy flows that entail consumption of resources and production of waste materials in the pursuit of economic welfare and social progress. According to a sustainability perspective, environmental, social and economic indicators must also be integrated into urban planning processes. However, methodological advances regarding the definition and development of sustainable cities are required since a consensus of indicators, weighting and data management is still lacking. In this paper, a multi-criteria approach that combines three methodologies: Material Flow Analysis (MFA), Life Cycle Assessment (LCA) and Data Envelopment Analysis (DEA) has been developed and applied to a sample of 26 representative Spanish cities with different characteristics (i.e., population, location, demands, economy, topography and culture). The combined approach allows identifying the non-sustainable cities considering an offset of indicators from the three pillars of sustainability. With this purpose, the mentioned items are implemented in a DEA model of efficiency, being the inefficient cities with an efficiency score lower than 100% defined as non-sustainable ones. Finally, this multi-criteria method allows setting the target values for the assessed indicators (benchmarked values), which become objectives for the non-sustainable cities to evolve toward a more sustainable performance. The outcomes from the analysis have identified six cities that ranked worse, with efficiency scores ranging from 57.9% to 85.8%. According to the targets of socio-economic indicators, attention should be paid to AROPE rate (people at risk of poverty and social exclusion), unemployment rate and number of crimes, meanwhile lower levels of electricity consumption, municipal solid waste and on-site greenhouse gases emissions are desirable from an environmental perspective. These outcomes are of potential interest for politicians, governments and inhabitants to aid in the identification of the metabolic flows and social/economic indicators to be optimized in search of sustainability.

Environmental aspects of oriented strand boards production. A Brazilian case study
Authors: Sara Gonzalez
Authors-Ext: Fabiane Salles Ferro, Diogo Aparecido Lopes Silva, Francisco Antonio Rocco Lahr, Mateus Argentonc
Magazine/book: Journal of Cleaner Production
Volume: 183
Pages: 710-719
Date of publication: 10/05/2018
Publishing house: Elsevier
ISBN: ISSN: 0959-6526
Impact Index: 5.65
DOI: link

Abstract

Use and production of industrialized wood based panels is increasing in Brazil and one of the outstanding products is the Oriented Strand Boards (OSB). At the same time, environmental concerns by companies and society about products and production systems are also growing, and the current study aims to assess the environmental impacts associated to the Brazilian OSB production in order to propose improvement alternatives focused on their profile's enhancement. Thus, a Life Cycle Assessment (LCA) study was performed according to ISO14040 and 14044 frameworks. The study covers the life cycle of OSB production from a cradle-to-gate perspective and considering real practices carried out in a representative Brazilian company. The production system has been divided in two main subsystems: Forest operations (SS1) and Panel factory (SS2). The environmental profiles have been reported considering characterization factors from the ReCiPe method, in terms of nine impact categories: climate change (CC), ozone depletion (OD), terrestrial acidification (TA), freshwater eutrophication (FE), marine eutrophication (ME), human toxicity (HT), photochemical oxidant formation (POF), terrestrial ecotoxicity (TET), freshwater ecotoxicity (FET), fossil depletion (FD). According to the results, the industrial activities carried out within SS2 have been identified as the largest responsible of contributions to all impact categories under assessment. The production of pyrethroid termiticide, which is applied in the panels to improve their resistance to attack by wood decay organisms, was the largest contributor to OD, FE, HT and FET. Scenarios based on the substitution of pyrethroid termiticide were proposed and results showed that substituting the pyrethroid termiticide by different types of boron based termiticides could lead to reduce environmental impacts up to 35%. The identification of the main environmental hotspots in the OSB cradle-to-gate life cycle can assist the Brazilian industry to improve its environmental profile by adopting the proposed scenarios for SS2. Finally, further research should be focused on exploring more types of termiticides that can be applied in the OSB panel.

The importance of using life cycle assessment in policy support to determine the sustainability of fishing fleets: a case study for the small-scale xeito fishery in Galicia, Spain
Authors-Ext: Ian Vázquez-Rowe
Magazine/book: The International Journal of Life Cycle Assessment
Volume: 23
Pages: 1091–1106
Date of publication: 01/05/2018
Publishing house: Springer
ISBN: 0948-3349
DOI: link
Role of methanogenesis on the biotransformation of organic micropollutants during anaerobic digestion
Magazine/book: Science of the Total Environment
Pages: 459-466
Date of publication: 01/05/2018
Publishing house: Elsevier
ISBN: ISSN: 0048-9697
Impact Index: 4.61
Quartil: Q1
Decil: D1
DOI: link

Abstract

Several studies showed that some organic micropollutants (OMPs) are biotransformed during anaerobic digestion (AD). Yet, most of them aim at reporting removal efficiencies instead of understanding the biotransformation process. Indeed, how each of the main AD stages (i.e., hydrolysis, acidogenesis, and methanogenesis) contribute to OMP biotransformation remains unknown. This study focuses on investigating the role of methanogenesis, the most characteristic step of AD, to OMP removal. More specifically, the sorption and the biotransformation of 20 OMPs by methanogenic biomass were analyzed determining their concentrations in both liquid and solid phases. Sorption onto methanogenic biomass displayed a similar behavior as reported for digested sludge. Most of the OMPs were biotransformed to a medium extent (35–70%) and only sulfamethoxazole was completely removed. Comparing these results with those reported for the complete AD process, methanogenesis was proven to play a key role, accounting for more than 50% of the OMP biotransformation (except for roxithromycin) during AD. An increase in the organic loading rate from 1 to 2 g COD/L d, typical loads employed in sewage sludge anaerobic digesters, did not exert a clear cometabolic effect on the OMPs biotransformation. It is hypothesized that biotransformation occurs in both liquid and solid phases because no link between the partition coefficient (Kd) and the overall biotransformation efficiency was found. These findings allow a better understanding of the OMPs fate under anaerobic conditions, which is necessary to design efficient biological mitigation strategies.

The relevance of supply chain characteristics in GHG emissions: The carbon footprint of Maltese juices
Authors-Ext: S.Rodríguez-García, V.P.Valdramidis
Magazine/book: Food Research International
Volume: 107
Pages: 747-754
Date of publication: 01/05/2018
Publishing house: Elsevier
ISBN: ISSN: 0963-9969
Impact Index: 3.52
DOI: link
Comparative environmental Life Cycle Assessment of integral revalorization of vine shoots from a biorefinery perspective
Authors-Ext: Patricia Gullón, Izaskun Dávila, Jalel Labidi
Magazine/book: Science of The Total Environment
Volume: 624
Pages: 225-240
Date of publication: 01/05/2018
Publishing house: Elsevier
ISBN: ISSN: 0048-9697
Impact Index: 4.61
DOI: link
Evaluation of a low-cost magnesium product for phosphorus recovery by struvite crystallization
Authors-Ext: Samuel Rodrigues, David Ruddle
Magazine/book: Journal of Chemical Technology and Biotechnology
Volume: 93
Issue: 4
Pages: 1012–1021
Date of publication: 01/04/2018
Publishing house: Society of Chemical Industry
DOI: link

Abstract

The development of a cost‐effective process of struvite crystallization requires the selection of appropriate sources of alkali and magnesium. In this study, the effectiveness of two industrial grade products, MgO and Mg(OH)2, as magnesium and alkali sources to recover phosphorus as struvite were investigated and compared in a first set of experiments. Subsequently, the use of industrial Mg(OH)2 was compared in two different struvite crystallization systems, an upflow fluidized bed reactor (FBR) and a continuous stirred tank reactor (CSTR) coupled to a settler tank

Influence of biomass acclimation on the performance of a partial nitritation-anammox reactor treating industrial saline effluents
Authors-Ext: Elisa A.Giustinianovich, José-LuisCampos, Marlene D.Roeckel, Alejandro J.Estrada
Magazine/book: Chemosphere
Volume: 194
Pages: 131-138
Date of publication: 01/03/2018
Publishing house: Elsevier
ISBN: ISSN: 0045-6535
Impact Index: 4.55
Quartil: Q1 Envrionmental Sciences (2016)
Decil: 32/229
DOI: link
Yerba mate waste: A sustainable resource of antioxidant compounds
Authors-Ext: René Herrera, Jalel Labidi, Patricia Gullón
Magazine/book: Industrial Crops and Products
Volume: 113
Pages: 398-405
Date of publication: 01/03/2018
Publishing house: Elsevier
ISBN: ISSN: 0926-6690
Impact Index: 3.85
DOI: link

Abstract

The infusion of yerba mate (Ilex paraguariensis St. Hil.) is the most popular tea-like beverage of southern Latin American countries, and its health benefits such as stimulating effect and antioxidant activity are well known. The exhausted mate leaves are managed as waste and are not currently exploited or valorized as a bio-resource. In this work, a cost-effective alternative for extracting antioxidant compounds from this type of residue as a possible valorization route was investigated. Accordingly, different liquid/solid ratios, solvents and extraction times were evaluated with the aim of maximizing extraction performance, total phenolic (TPC) and flavonoid (TFC) content and antioxidant activity (AA) of the extracts. The optimal conditions allowed the recovery of high level of phenolics (TPC 63.13 mg gallic acid equivalents/g) and flavonoids (TFC 148.45 mg rutin equivalents/g) in the extract, with remarkable content in AA (111.18 mg Trolox equivalents/g). Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) analysis identified that the main compounds in the extract were terpenes (phenol, guaiacol, 4-vinylguaicol and eugenol), caffeine, 4-ethyl-resorcinol, hydroquinone, palmitic acid, and stearic acid. Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA) analyses provided the functional characteristics and thermal stability of the extract. From the results obtained, it can be concluded that the residue of yerba mate after the infusion of the original yerba mate still possesses high antioxidant potential, mainly associated with its phenolic and flavonoid composition. Furthermore, the content of antioxidant phenolic compounds reported here was higher than most of those reported for agro-industrial residues. Therefore, this type of waste, that is generally discarded, can be valorized as a source of high added-value compounds.

Development of a Superparamagnetic Laccase Nanobiocatalyst for the Enzymatic Biotransformation of Xenobiotics
Authors-Ext: Z. Vargas-Osorio; C. Vazquez-Vazquez
Magazine/book: Journal of Environmental Engineering
Volume: 144
Issue: 3
Date of publication: 01/03/2018
Publishing house: American Society of Civil Engineers
ISBN: ISSN (print): 0733-9372 | ISSN (online): 1943-7870
DOI: link

Abstract

The development of nanotechnology has provided a range of diverse nanoscale carriers that can be potentially applied for enzyme immobilization. Among the different types of support, magnetic nanoparticles (mNPs) have received increasing attention because they can be easily recovered from the reaction medium by applying an external magnetic field. In the present study, silica-coated magnetic nanoparticles (Fe3O4@SiO2) were prepared, characterized, and used for covalent immobilization of laccase from Trametes versicolor. Different concentrations of the functionalization agent (3-aminopropyltriethoxysilane), cross-linker (glutaraldehyde), and laccase allowed a maximum enzyme loading of 2.68±0.08  U mg−1 mNP. Several factors, including pH, T, presence of inactivating compounds, enzyme stability, and reusability of the support, were evaluated. The oxidative action of the enzyme toward xenobiotics was proven in the formation of the chromogenic radical of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and the biotransformation of the endocrine-disrupting compound Bisphenol A (BPA). The enhancement of catalytic activity and stability of the nanobiocatalyst was evidenced by the increase of ABTS oxidation. Moreover, the superparamagnetic characteristic of the support allowed simple and fast recovery of the nanobiocatalyst. With the development of nanobiocatalyst-driven applications in mind, the development of magnetic nanoparticle synthesis at large scale as well as the design of bioreactors that assure the retention and recovery of the nanobiocatalyst need to addressed.

Valorization of peanut shells: Manufacture of bioactive oligosaccharides
Authors: Beatriz Gullón
Authors-Ext: Xiana Rico, José Luis Alonsoa, Juan Carlos Parajó, Remedios Yáñez
Magazine/book: Carbohydrate Polymers
Volume: 183
Pages: 21-28
Date of publication: 01/03/2018
Publishing house: Elsevier
ISBN: ISSN: 0144-8617
Impact Index: 5.16
DOI: link
Performance of a hybrid membrane bioreactor treating a low strength and alkalinity wastewater
Authors-Ext: José Ramón Vázquez-Padín, Rosa Weiler, Roberto Fernández-González, Frank Rogalla
Magazine/book: Process Biochemistry
Volume: 66
Pages: 176-182
Date of publication: 01/03/2018
Publishing house: Elsevier
ISBN: ISSN: 1359-5113
Impact Index: 2.62
DOI: link

Abstract

A pilot-scale Hybrid Membrane Bioreactor (HMBR) containing both suspended biomass and biofilm was tested for the treatment of a low strength municipal wastewater. The wastewater fed was characterized by a high variability throughout the day, low BOD5/TN ratio and low alkalinity (302 ± 52 mgCaCO3/L). For limiting membrane fouling, an innovative abrasive granular material has been proven in the Microdyn-Nadir membrane. Permeability ranged from 126 to 291 L/(h m2 bar) during the operational period, achieving a maximum flux of 24 L/(m2 h). A low BOD5/TN ratio of the raw wastewater, led to insufficient denitrification, with an average nitrogen removal of 49%. This fact, in turn, caused a decrease in the pH due to the lack of alkalinity. This study underlined that wastewaters characterized by high variability throughout the day, low BOD5/TN ratio and/or low alkalinity content require carefully design of the MBR systems. It was shown that a low pH in the HMBR led to a strong membrane fouling increasing cake resistances.

Understanding the sorption and biotransformation of organic micropollutants in innovative biological wastewater treatment technologies
Authors-Ext: T.Alvarino
Magazine/book: Science of The Total Environment
Pages: 297–306 Vol 615
Date of publication: 15/02/2018
Publishing house: Elsevier
ISBN: ISSN: 0048-9697
Impact Index: 4.90
DOI: link
Dynamic environmental efficiency assessment for wastewater treatment plants
Authors-Ext: Ian Vázquez, Desirée Marín-Navarro, Rosa M. Crujeiras
Magazine/book: The International Journal of Life Cycle Assessment
Volume: 23
Issue: 2
Pages: 357–367
Date of publication: 01/02/2018
Publishing house: Springer
ISBN: 0948-3349 (Print) 1614-7502 (Online)
DOI: link
Environmental assessment of biorefinery processes for the valorization of lignocellulosic wastes into oligosaccharides
Magazine/book: Journal of Cleaner Production
Volume: 172
Pages: 4066-4073
Date of publication: 20/01/2018
Publishing house: Elsevier
ISBN: ISSN: 0959-6526
Impact Index: 5.65
DOI: link
Environmental impacts of the cultivation-phase associated with agricultural crops for feed production
Authors-Ext: Jacopo Bacenetti, Marco Fiala
Magazine/book: Journal of Cleaner Production
Volume: 172
Pages: 3721-3733
Date of publication: 20/01/2018
ISBN: ISSN: 0959-6526
Impact Index: 5.65
DOI: link

Abstract

Life Cycle Assessment (LCA) methodology was used to estimate the environmental impacts and identify the most critical stages (hotspots) of cultivation of three cereal crops typically used for animal feed purposes – barley, rye and sorghum – in the Lombardy region, the most productive crop and livestock area in Northern Italy. The crop variety (out of 3 and 4 varieties of barley and rye, respectively) and cultivation regime (single vs. double cropping of sorghum) with the lowest impacts per kg of crude protein (mass-based functional unit) were identified. Environmental impact categories reported by ReCiPe method were used. According to the results, both Reni and Dank Nowe were the varieties with the lowest environmental impacts for barley and rye varieties, respectively; single cropping of sorghum had lower impacts than double cropping. Impact hotspots included field emissions, agricultural activities and agrochemical (fertilisers and herbicides) production regardless the cropping system considered. Moreover, among the cereals studies, rye was identified as the best environmental alternative. Use of land-based and economic functional units did not change the ranking of systems according to their impacts.

What happens with organic micropollutants during UV disinfection in WWTPs? A global perspective from laboratory to full-scale
Magazine/book: Journal of Hazardous Materials
Pages: 670–678 Vol.342
Date of publication: 15/01/2018
ISBN: ISSN: 0304-3894
Impact Index: 6.07
Lessons learned from the treatment of organosolv pulp with ligninolytic enzymes and chemical delignification agents
Authors-Ext: María García-Torreiro
Magazine/book: Cellulose
Volume: 25
Issue: 1
Pages: 763–776
Date of publication: 10/01/2018
Publishing house: Springer
ISBN: 0969-0239
DOI: link
Blending based optimisation and pretreatment strategies to enhance anaerobic digestion of poultry manure
Magazine/book: Waste Management
Pages: Issue 71, 521–531
Date of publication: 01/01/2018
Publishing house: Elsevier
ISBN: ISSN: 0956-053X
¿Debemos preocuparnos por la presencia de nanopartículas metálicas en la depuración de aguas residuales?
Magazine/book: Investigación: cultura, ciencia y tecnología
Volume: 10
Issue: 20
Pages: 28-35
Date of publication: 01/01/2018
Publishing house: Universidad de Vigo
ISBN: ISSN: 1889-4399
Gamestorming for the Conceptual Design of Products and Processes in the context of engineering education
Authors-Ext: Crujeira, R.M.
Magazine/book: Education for Chemical Engineers
Volume: 22
Pages: 44-52
Date of publication: 01/01/2018
Publishing house: Elsevier
ISBN: 1749-7728
DOI: link
The environmental impact of magnetic nanoparticles under the perspective of carbon footprint (Chapter 3)
Authors-Ext: Vázquez-Vázquez, C.
Muthu, S.S. (ed).
Magazine/book: Environmental Carbon Footprints: Industrial Case Studies (Book)
Pages: 45-77
Date of publication: 01/01/2018
Publishing house: Butterworth-Heinemann Publishing (Elsevier)
ISBN: 978-0-12-812849-7
Simultaneous valorization and detoxification of the hemicellulose rich liquor from the organosolv fractionation
Magazine/book: International Biodeterioration & Biodegradation
Pages: 112-118 Vol126
Date of publication: 01/01/2018
Publishing house: Elsevier
ISBN: ISSN: 0964-8305
Sequential reactors for the removal of endocrine disrupting chemicals by laccase immobilized onto fumed silica microparticles
Magazine/book: Biocatalysis and Biotransformation
Volume: 36
Issue: 3
Pages: 254-264
Date of publication: 01/01/2018
Publishing house: Taylor and Francis Group
ISBN: Print ISSN: 1024-2422 Online ISSN: 1029-2446
Impact Index: 1.06
DOI: link

Pages