A5041307928- Wastewater Treatment and Nitrogen Removal
- Water Treatment and Disinfection
- Microbial Community Ecology and Physiology
- Microbial Fuel Cells and Bioremediation
- Geochemistry and Elemental Analysis
- Environmental DNA in Biodiversity Studies
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Geophysical and Geoelectrical Methods
- Methane Hydrates and Related Phenomena
- Fecal contamination and water quality
- Mine drainage and remediation techniques
Delft University of Technology
2022-2025
Abstract Microorganisms encoding for the N2O reductase (NosZ) are only known biological sink of potent greenhouse gas and central to global mitigation efforts. Clade II NosZ populations particular biotechnological interest as they usually feature high affinities often lack other denitrification genes. We focus on yet-unresolved ecological constraints selecting different N2O-reducers strains controlling assembly N2O-respiring communities. Two planktonic mixed cultures were enriched at low...
Rapid sand filters (RSF) are an established and widely applied technology for groundwater treatment. Yet, the underlying interwoven biological physical-chemical reactions controlling sequential removal of iron, ammonia manganese remain poorly understood. To resolve contribution interactions between individual reactions, we studied two full-scale drinking water treatment plant configurations, namely (i) one dual-media (anthracite quartz sand) filter (ii) single-media (quartz in series. In...
Rapid sand filters are established and widely applied technologies for groundwater treatment. In these filters, main contaminants such as iron, manganese, ammonium oxidized removed. Conventionally, intensive aeration is employed to provide oxygen redox reactions. While effective, promotes flocculent iron removal, which results in oxide flocs that rapidly clog the filter. this study, we operated two parallel full-scale at different intensities resolve relative contribution of homogeneous,...
Rapid sand filters (RSF) are an established and widely applied technology for the removal of dissolved iron (Fe2+) ammonium (NH4+) among other contaminants in groundwater treatment. Most often, biological NH4+oxidation is spatially delayed starts only upon complete Fe2+ depletion. However, mechanism(s) responsible inhibition by or its oxidation (by)products remains elusive, hindering further process control optimization. We used batch assays, lab-scale columns, full-scale filter...
Drinking water treatment plants (DWTPs) are designed to remove physical, chemical, and biological contaminants. However, until recently, the role of DWTPs in minimizing cycling antibiotic resistance determinants has got limited attention. In particular, risk selecting antibiotic-resistant bacteria (ARB) is largely overlooked chlorine-free where processes applied. Here, we combined high-throughput quantitative PCR metagenomics analyze abundance dynamics microbial communities, genes (ARGs),...
Abstract Nitrate leaching from agricultural soils is increasingly found in groundwater, a primary source of drinking water worldwide. This nitrate influx can potentially stimulate the biological oxidation iron anoxic groundwater reservoirs. Nitrate-dependent iron-oxidizing (NDFO) bacteria have been extensively studied laboratory settings, yet their ecophysiology natural environments remains largely unknown. To this end, we established pilot-scale filter on nitrate-rich to elucidate structure...
Abstract Rapid sand filters are established and widely applied technologies for groundwater treatment. Conventionally, intensive aeration is employed to provide oxygen the oxidation removal of main contaminants. While effective, promotes flocculent iron removal, which results in flocs that rapidly clog filter. In this study, we operated two parallel full-scale at different intensities resolve relative contribution homogeneous, heterogeneous biological pathways, identify their operational...
Abstract Rapid sand filters (RSF) are an established and widely applied technology for the removal of dissolved iron (Fe 2+ ) ammonium (NH + in groundwater treatment. Most often, biological NH oxidation is delayed starts only upon complete Fe depletion. However, mechanism(s) responsible inhibition by or its (by)products remains elusive, hindering further process control optimization. We used batch assays, lab-scale columns, full-scale filter characterizations to resolve individual impact...
Abstract Microorganisms encoding for the N 2 O reductase (NosZ) are only known biological sink of potent greenhouse gas O, and central to global mitigation efforts. Yet, ecological constraints selecting different O-reducers strains controlling assembly O-respiring communities remain largely unknown. Of particular biotechnological interest clade II NosZ populations, which usually feature high affinities often lack other denitrification genes. Two planktonic mixed cultures were enriched under...
Abstract Rapid sand filters (RSF) are an established and widely applied technology for groundwater treatment. Yet, the underlying interwoven biological physical-chemical reactions controlling sequential removal of iron, ammonia manganese remain poorly understood. To resolve contribution interactions between individual reactions, we studied two full-scale drinking water treatment plant configurations, namely ( i ) one dual-media (anthracite quartz sand) filter ii single-media (quartz in...
Abstract Nitrate leaching from agricultural soils is increasingly found in groundwater, a primary source of drinking water worldwide. This nitrate influx can potentially stimulate the biological oxidation iron anoxic groundwater reservoirs. Nitrate-reducing iron-oxidizing (NRFO) bacteria have been extensively studied laboratory settings, yet their ecophysiology natural environments remains largely unknown. To this end, we established pilot-scale filter on nitrate-rich to elucidate structure...
ABSTRACT Drinking water treatment plants (DWTPs) are designed to remove physical, chemical, and biological contaminants. However, until recently, the role of DWTPs in minimizing cycling antibiotic resistance determinants has got limited attention. In particular, risk selecting antibiotic-resistant bacteria (ARB) is largely overlooked chlorine-free where processes applied. Here, we combined high-throughput quantitative PCR metagenomics analyze abundance dynamics microbial communities, genes...