Raquel Lebrero

Universidad de Valladolid

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Raúl Muñoz

Universidad de Valladolid

168

Sara Cantera

Universidad de Valladolid

Pedro A. García‐Encina

Universidad de Valladolid

Víctor Pérez

Universidad de Valladolid

José M. Estrada

Universidad de Valladolid

Celia Marcos Pascual

Universidad de Valladolid

David Marín

Universidad de Valladolid

María del Rosario Rodero

Universidad de Valladolid

RÁ

Roxana Ángeles

Universidad de Valladolid

Rebeca Pérez

Universidad de Valladolid

Cooperative Institutions

Biocat

148

Cell Biotech (South Korea)

147

Universidad de Valladolid

116

Universitat de València

University of St Andrews

University of Almería

University of Crete

Democritus University of Thrace

Hellenic Open University

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

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Two-liquid phase partitioning biotrickling filters for methane abatement: Exploring the potential of hydrophobic methanotrophs

Journal of Environmental Management (2014)

Raquel Lebrero Laura Hernández Rebeca Pérez José M. Estrada Raúl Muñoz

Aqueous two-phase system

Methanotroph

10.1016/j.jenvman.2014.12.016

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Citations (36)

Exploring naphthalene vapor biofiltration: performance and microbial community dynamics with diverse inoculums

Journal of Chemical Technology & Biotechnology (2024)

J. San Martín-Davison Raquel Lebrero Christian Vergara‐Ojeda Felipe Scott César Huiliñir

Abstract Background Naphthalene is a polycyclic aromatic hydrocarbon, highly dangerous for human health. It is produced as a byproduct of incomplete combustion of organic material and is frequently present in the air. Biofilters offer an effective alternative for its treatment. The aim of this work was to study the treatment of naphthalene vapors through biofiltration using two biofilters: one inoculated with a consortium composed of Fusarium solani and Rhodococcus erythropolis (BF1), and the other inoculated with a consortium of microbial isolates obtained from a previous biofilter eliminating naphthalene vapors. Results The results demonstrate that inoculating a biofilter with a reconstructed consortium of microbial isolates from a naphthalene vapor‐eliminating biofilter allowed a reduction of the startup time from 35 to 5 days, while maintaining a consistent removal capacity (6 g m −3 h −1 , equivalent to 80% removal efficiency). It was also observed that the biofilter inoculated with the reconstructed consortium exhibited comparable robustness to a biofilter previously operated for 4 months with naphthalene, with a maximum removal capacity of 14 g m −3 h −1 for a naphthalene inlet load of 17 g m −3 h −1 . The study of microbial communities indicates an increase in the bacterial variability, while fungal variability remains low, with Fusarium solani being predominant at 97%. Conclusions Results obtained during the startup of both biofilters and by challenging biofilters to increasing naphthalene concentrations or decreasing empty bed residence time showed that startup time can be reduced sevenfold by selecting the microbial consortium. An equivalent performance, in the long run, was achieved for both biofilters. © 2024 Society of Chemical Industry (SCI).

Biofilter

10.1002/jctb.7744

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Citations (0)

Polyhydroxyalkanoates production from methane emissions in Sphagnum mosses: Assessing the effect of temperature and phosphorus limitation

The Science of The Total Environment (2019)

Rebeca Pérez Jesús Casal Raúl Muñoz Raquel Lebrero

Sphagnum

Methanotroph

Bioconversion

10.1016/j.scitotenv.2019.06.296

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Citations (20)

Botanical filters for the abatement of indoor air pollutants

Chemosphere (2023)

María Sol Montaluisa-Mantilla Pedro A. García‐Encina Raquel Lebrero Raúl Muñoz

Nowadays, people spend 80–90% of their time indoors, while recent policies on energy efficient and safe buildings require reduced building ventilation rates and locked windows. These facts have raised a growing concern on indoor air quality, which is currently receiving even more attention than outdoors pollution. Prevention is the first and most cost-effective strategy to improve indoor air quality, but once pollution is generated, a battery of physicochemical technologies is typically implemented to improve air quality with a questionable efficiency and at high operating costs. Biotechnologies have emerged as promising alternatives to abate indoor air pollutants, but current bioreactor configurations and the low concentrations of indoor air pollutants limit their widespread implementation in homes, offices and public buildings. In this context, recent investigations have shown that potted plants can aid in the removal of a wide range of indoor air pollutants, especially volatile organic compounds (VOCs), and can be engineered in aesthetically attractive configurations. The original investigations conducted by NASA, along with recent advances in technology and design, have resulted in a new generation of botanical biofilters with the potential to effectively mitigate indoor air pollution, with increasing public aesthetics acceptance. This article presents a review of the research on active botanical filters as sustainable alternatives to purify indoor air.

10.1016/j.chemosphere.2023.140483

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Citations (15)

Dataset _ Seasonal variation of biogas upgrading coupled with digestate treatment in an outdoors pilot scale algal-bacterial photobioreactor

Zenodo (CERN European Organization for Nuclear Research) (2018)

David Marín Esther Posadas Patricia Cano Víctor Pérez Saúl Blanco

This is the dataset used for the publication of the journal article title “Seasonal variation of biogas upgrading coupled with digestate treatment in an outdoors pilot scale algal-bacterial photobioreactor”. In this dataset there is all the information collected in the experimentation process.

Photobioreactor

Digestate

Biogas

10.5281/zenodo.2547427

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Citations (0)

Comparative performance evaluation of conventional and two‐phase hydrophobic stirred tank reactors for methane abatement: Mass transfer and biological considerations

Biotechnology and Bioengineering (2015)

Sara Cantera José M. Estrada Raquel Lebrero Pedro A. García‐Encina Raúl Muñoz

ABSTRACT This study demonstrated for the first time the capability of methanotrophs to grow inside silicone oil (SO200) and identified the optimum cultivation conditions for enrichment of hydrophobic methanotrophs (high dilution rates (D) and low CH 4 transfer rates). The potential of the hydrophobic methanotrophs enriched was assessed in a single‐phase stirred tank reactor (1P‐STR) and in a two‐phase stirred tank reactor (2P‐STR). Different operational conditions were systematically evaluated in both reactors (SO200 fractions of 30 and 60 %, stirring rates of 250 and 500 rpm, and D of 0.1–0.35 day −1 with and without biomass retention). The results showed that the TPPB only supported a superior CH 4 abatement performance compared to the 1P‐STR (40% enhancement at 250 rpm and 25% enhancement at 500 rpm) at a D of 0.3 day −1 due to the retention of the biocatalytic activity inside the SO200, while the 1P‐STR achieved higher elimination capacities (EC up to ≈3 times) than the TPPB under the rest of conditions tested (EC max = 91.1 g m −3 h −1 ). Furthermore, the microscopic examination and DGGE‐sequencing of the communities showed that the presence of SO200 influenced the microbial population structure, impacting on bacterial biodiversity and favoring the growth of methanotrophs such as Methylosarcina . Biotechnol. Bioeng. 2016;113: 1203–1212. © 2015 Wiley Periodicals, Inc.

10.1002/bit.25897

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Citations (42)

Biological conversion and revalorization of waste methane streams

Critical Reviews in Environmental Science and Technology (2017)

Raquel Lebrero Kartik Chandran

Methane-laden anthropogenic emissions are widely variable in terms of methane (CH4) concentration depending on their source, ranging from <3% up to 80% of CH4 as in biogas. Diluted emissions are commonly flared or directly vented to the atmosphere, while CH4 concentrations exceeding 20% allow for energy production by direct combustion. Nevertheless, these practices entail a loss of potential energy and/or detrimental effects to the environment resulting from the release of greenhouse gases (CO2 and CH4) directly to the atmosphere. In this context, the implementation of low-cost, environmentally friendly biotechnologies aiming not only at abating CH4 from these off-gases but targeting its revalorization represents a sustainable alternative from both an economic and environmental point of view. This review critically presents the state-of-the-art of biotechnologies devoted to the revalorization of anthropogenic CH4 emissions, with a special focus on the bioconversion to methanol of the CH4 contained in diluted streams and on the biological upgrading of the biogas to biomethane.

Biogas

Bioconversion

Environmentally Friendly

10.1080/10643389.2017.1415059

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Citations (13)

Biogas-based polyhydroxyalkanoates production by Methylocystis hirsuta: A step further in anaerobic digestion biorefineries

Chemical Engineering Journal (2017)

Juan Carlos López Esther Arnáiz Laura Merchán Raquel Lebrero Raúl Muñoz

Biogas

Valeric acid

10.1016/j.cej.2017.09.185