Martín Ramírez
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View article: Anoxic desulfurization of biogas rich in hydrogen sulfide through feedback control using biotrickling filters: Operational limits and multi-omics analysis
Anoxic desulfurization of biogas rich in hydrogen sulfide through feedback control using biotrickling filters: Operational limits and multi-omics analysis Open
Biodesulfurization is crucial for sustainable biogas purification from hydrogen sulfide (H2S). This study investigates the operational limits of anoxic biotrickling filters (BTFs) for treating biogas with high H2S concentrations (up to 20,…
View article: Chemolithoautotrophic elimination of H2S from biogas in a pilot-scale biotrickling filter for agricultural applications
Chemolithoautotrophic elimination of H2S from biogas in a pilot-scale biotrickling filter for agricultural applications Open
Hydrogen sulfide (H2S) removal is the single most essential treatment step for most biogas applications. This study compiles an exploratory analysis of a pilot-scale biotrickling filter (BTF) for H2S removal under anoxic conditions to eval…
View article: Temporal Profiles of Volatile Organic Compounds near the Houston Ship Channel, Texas
Temporal Profiles of Volatile Organic Compounds near the Houston Ship Channel, Texas Open
Houston, Texas, with its large-scale industrial activities, serves as a national hub for petrochemical processing and chemical feedstock production, making it a unique emission region for volatile organic compounds (VOCs) and production-re…
View article: Project‐Based Learning in Bioprocess Engineering: MATLAB Software as a Tool for Industrial‐Scale Bioreactor Design
Project‐Based Learning in Bioprocess Engineering: MATLAB Software as a Tool for Industrial‐Scale Bioreactor Design Open
The project‐based learning (PBL) methodology has proven to be a valuable pedagogical approach in engineering programs for decades. However, a significant gap remains in the application of such methodologies in the field of bioprocess engin…
View article: Sustainable Recovery of Platinum Group Metals from Spent Automotive Three-Way Catalysts through a Biogenic Thiosulfate-Copper-Ammonia System
Sustainable Recovery of Platinum Group Metals from Spent Automotive Three-Way Catalysts through a Biogenic Thiosulfate-Copper-Ammonia System Open
This study explores an eco-friendly method for recovering platinum group metals from a synthetic automotive three-way catalyst (TWC). Bioleaching of palladium (Pd) using the thiosulfate-copper-ammonia leaching processes, with biogenic thio…
View article: Bioleaching of the α-alumina layer of spent three-way catalysts as a pretreatment for the recovery of platinum group metals
Bioleaching of the α-alumina layer of spent three-way catalysts as a pretreatment for the recovery of platinum group metals Open
Acid bioleaching of Al by Acidithiobacillus thiooxidans has been explored as an environmentally friendly pretreatment to facilitate the extraction of platinum group metals from spent three-way catalysts (TWC). Biogenic sulfur obtained from…
View article: Application of a Microalgal Peptide-Enriched Extract as Media Component in <i>E. coli</i> Culture
Application of a Microalgal Peptide-Enriched Extract as Media Component in <i>E. coli</i> Culture Open
This study evaluated the feasibility of applying a microalgal peptide-enriched extract, obtained through a sequential alkaline and enzymatic method, as a fundamental media component in Escherichia coli culture. The results demonstrated tha…
View article: Recent advances in biological technologies for anoxic biogas desulfurization
Recent advances in biological technologies for anoxic biogas desulfurization Open
Recovery of the energy contained in biogas will be essential in coming years to reduce greenhouse gas emissions and our current dependence on fossil fuels. The elimination of H2S is a priority to avoid equipment corrosion, poisoning of cat…
View article: Implementation of a Pilot-Scale Biotrickling Filtration Process for Biogas Desulfurization under Anoxic Conditions Using Agricultural Digestate as Trickling Liquid
Implementation of a Pilot-Scale Biotrickling Filtration Process for Biogas Desulfurization under Anoxic Conditions Using Agricultural Digestate as Trickling Liquid Open
A pilot-scale biotrickling filter (BTF) was operated in counter-current flow mode under anoxic conditions, using diluted agricultural digestate as inoculum and as the recirculation medium for the nutrient source. The process was tested on-…
View article: Methane concentration and bacterial communities’ dynamics during the anoxic desulfurization of landfill biogas under diverse nitrate sources and hydraulic residence times
Methane concentration and bacterial communities’ dynamics during the anoxic desulfurization of landfill biogas under diverse nitrate sources and hydraulic residence times Open
Landfill biogas contains certain amounts of H2S that must be removed in order to prevent both equipment corrosion and SO2 emissions to the atmosphere when burnt. Anoxic desulfurization has been proven to be an eco-friendly and cost-efficie…
View article: Characterization of Bacterial and Archaeal Communities by DGGE and Next Generation Sequencing (NGS) of Nitrification Bioreactors Using Two Different Intermediate Landfill Leachates as Ammonium Substrate
Characterization of Bacterial and Archaeal Communities by DGGE and Next Generation Sequencing (NGS) of Nitrification Bioreactors Using Two Different Intermediate Landfill Leachates as Ammonium Substrate Open
Nitrification–denitrification is an environmentally friendly and cost-effective way to treat landfill leachates. Special attention has been given to the nitrification step, usually the limiting one due to its special sensitivity to environ…
View article: Development and validation of a sampling and analysis method to determine biogenic sulfur in a desulfurization bioreactor by gas chromatography coupled with a pulsed flame photometric detector (GC-PFPD)
Development and validation of a sampling and analysis method to determine biogenic sulfur in a desulfurization bioreactor by gas chromatography coupled with a pulsed flame photometric detector (GC-PFPD) Open
Suspended biomass bioreactors can be operated to remove H2S from biogas under anoxic conditions and produce elemental sulfur, the commercial value of which has been demonstrated. In the present paper, a novel methodology comprising the opt…
View article: Influence of Leachate and Nitrifying Bacteria on Photosynthetic Biogas Upgrading in a Two-Stage System
Influence of Leachate and Nitrifying Bacteria on Photosynthetic Biogas Upgrading in a Two-Stage System Open
Photosynthetic biogas upgrading using two-stage systems allows the absorption of carbon dioxide (CO2) in an absorption unit and its subsequent assimilation by microalgae. The production of microalgae requires large amounts of nutrients, th…
View article: Special Issue “Advances in Biogas Desulfurization”
Special Issue “Advances in Biogas Desulfurization” Open
This Special Issue contains three articles and two reviews. The biological reactors used in the studies were fed with real biogas from Landfill or STPs. One research article concerns the use of a pilot scale plant with a combined process w…
View article: Feedback and Feedforward Control of a Biotrickling Filter for H2S Desulfurization with Nitrite as Electron Acceptor
Feedback and Feedforward Control of a Biotrickling Filter for H2S Desulfurization with Nitrite as Electron Acceptor Open
Biotrickling filters’ control for H2S removal has special challenges because of complexity of the systems. Feedback and feedforward control were implemented in an anoxic biotrickling filter, operated in co-current flow mode and using nitri…