Wastewater Treatment and Nitrogen Removal

Building Predictive Understanding of Microbial Ecology by Bridging Microbial Growth Kinetics and Microbial Population Dynamics

The paper develops a modeling approach integrating microbial growth kinetics and population dynamics to predict microbial community behavior in activated sludge systems.

Hexavalent Chromium Inhibits Nitrate-Dependent Anaerobic Methane Oxidation While Enriching Denitrifiers: Insights into Microbial Interactions for Simultaneous Methane, Nitrate and Chromate Removal

This study investigates how hexavalent chromium affects nitrate-dependent anaerobic methane oxidation, finding it inhibits methane oxidation and reduces key microbial populations.

Machine-learning informs mitigation strategies for nitrous oxide emissions from wastewater operations

This paper uses machine learning to predict and mitigate nitrous oxide emissions from wastewater treatment systems by analyzing process variables and their impact on emissions.

Measuring Temporal Variations of Nucleotide Pools in Microbial Granular Biofilm Performing Enhanced Biological Phosphorous Removal

The paper develops a metabolomics workflow to measure temporal variations in nucleotide pools in EBPR biofilms, revealing dynamic changes in energy charge during metabolic processes.

Non-canonical reductive nitrous oxide production pathways in a seasonally stratified lake basin

The paper identifies non-canonical nitrous oxide production pathways in a lake through isotope analysis and incubation experiments, showing bacterial denitrification as dominant with contributions from chemo- and fungal denitrification.

Nitric oxide-forming nitrite reductases in the anaerobic ammonium oxidizer Kuenenia stuttgartiensis

The paper identifies two active nitrite reductases in K. stuttgartiensis that produce nitric oxide, contributing to the anammox reaction.

Nitrous oxide production, mechanisms, and modeling from a denitrifying phosphorus removal bioreactor

This study investigates N2O production in a wastewater treatment reactor, identifies key microbial pathways, and models N2O generation using metagenomic data.

Linking Oxygen-Induced Oxidative Stress to Resource Recovery by Enhancing the Production of Extracellular Polymeric Substances in Activated Sludge Microbial Communities

This study enhances EPS production in activated sludge by manipulating oxygen exposure to increase oxidative stress, resulting in a 90.5% higher EPS yield.

Hypoosmolarity inhibits archaeal ammonia oxidation

This study shows hypoosmolarity inhibits archaeal ammonia oxidation while promoting bacterial ammonia oxidation in different environments.

Sediments from a seasonally euxinic coastal ecosystem show high nitrogen cycling potential

The paper examines nitrogen cycling in sediments of a seasonally euxinic coastal ecosystem, finding high nitrogen removal potential through denitrification and DNRA.

Establishing a co-culture aggregate of N-cycle bacteria to elucidate flocculation in biological wastewater treatment

The paper demonstrates the feasibility of using a simplified N-cycle bacterial consortium to study bioflocculation in wastewater treatment by forming and observing microcolonies and macroclusters under controlled conditions.

A new nitrogen biochemical process: Oxidization of ammonium into nitrogen gas using nitrate

This study discovers a new anaerobic process where nitrate directly oxidizes ammonium to nitrogen gas, achieving high nitrogen removal rates.

Influence of carbon-to-nitrogen ratio on the denitrifying activities of a methanol-fed, marine recirculating denitrification reactor, and the evolution of the bacteria community during the operating process.

This study examines how varying carbon-to-nitrogen ratios affect denitrification in a marine reactor and microbial community evolution over 31 weeks.

Mitigating nitrous oxide emission by an ultra-fast bioprocess enabling the removal of high concentration N2O

This paper develops a novel bioprocess using a down-flow hanging sponge reactor to efficiently remove high concentrations of nitrous oxide, achieving over 96% removal efficiency for 300 ppm N2O.

Coupling Anaerobic Oxic and Integrated Fixed Activated Sludge Processes for Removal and Transformation of Refractory Organic Matter in Livestock and Poultry Digestate

This study compares anaerobic-oxic and IFAS systems for treating livestock digestate, finding IFAS achieves higher organic removal and promotes oxidative fragmentation of organic matter.

Multiple extracellular polymeric substances pathways expressed by Accumulibacter and the flanking community during aerobic granule formation and after influent modification

The paper studies microbial community changes and extracellular polymeric substances during aerobic granule formation and under phosphate concentration modification.

Microbial community characteristics and stable relationships centered on anammox bacteria revealed by global-scale analysis

This study identifies stable microbial relationships with anammox bacteria using global data, revealing key companion bacteria and their roles in anammox metabolism.

Multi-omics highlights challenges in assessing the composition and performance of microbial consortia for commercial applications

This study uses multi-omics to analyze a microbial consortium for wastewater treatment, revealing shifts in community composition and nitrogen cycling under different environmental conditions.

Membrane vesicles of Shewanella oneidensis MR-1 enhance denitrification growth in a species-selective manner

This study shows that membrane vesicles from Shewanella oneidensis MR-1 enhance denitrification in a species-selective way by promoting bacterial attachment and influencing metabolic activity.

Mechanisms of Anammox Adaptation to High Temperatures: Increased Cyclization of Ladderane Lipids and Proteomic Insights

This study investigates anammox bacteria adaptation to high temperatures, finding increased ladderane lipid cyclization and proteomic changes as key mechanisms.

Metabolic implications for dual substrate growth in "Candidatus Accumulibacter"

This study shows that dual substrate uptake by 'Candidatus Accumulibacter' improves metabolic efficiency in EBPR by reducing ATP losses through optimized storage polymer use.

Resource Recovery from Wastewater By Directing Microbial Metabolism Toward Production of Value-added Biochemicals

The paper tests if fluctuating oxygen levels in wastewater treatment can boost production of valuable biochemicals by altering microbial metabolism.

Microbial nitrogen removal versus recycling in the redox transition zone of a meromictic lake and its coupling to sulfur

The paper investigates nitrogen transformation pathways in a meromictic lake's redox transition zone, finding that nitrogen recycling via DNRA and nitrification dominates over denitrification under carbon limitation.

Emergence and disruption of cooperativity in a denitrifying microbial community

This study identifies pathway partitioning as a mechanism for complete denitrification in microbial communities and shows how imbalances in substrate utilization can disrupt cooperativity and lead to nitrous oxide emissions.

Occurrence and temporal dynamics of denitrifying protist endosymbionts in the wastewater microbiome

The paper investigates denitrifying protist endosymbionts in wastewater treatment plants, finding their presence in 20-50% of facilities and highlighting temporal fluctuations and incomplete denitrification pathways.

Lotka-Volterra Dynamics Facilitate Sustainable Biocontrol of Wastewater Sludge Bulking

The paper uses Lotka-Volterra dynamics to model the biocontrol of wastewater sludge bulking by protists against filamentous bacteria.

Selective enrichment of high-affinity clade II N2O-reducers in a mixed culture

The paper shows clade II N2O-reducers outcompete clade I under low N2O availability, and coexist under high N2O, with cobalamin interactions influencing community composition.

Meta-omic insights into active bacteria mediating N2O mitigation and dissimilatory nitrate reduction to ammonium in an ammonia recovery bioreactor

The paper uses metagenomics and metatranscriptomics to identify bacteria involved in N2O mitigation and ammonification in a bioreactor, showing how oxygen levels affect their activity.

Metagenomic analysis of age-dependent microbial dynamics in dual-media rapid sand filters treating groundwater

This study uses metagenomic analysis to reveal age-dependent microbial functional shifts in rapid sand filters, identifying key taxa and genes involved in contaminant removal.

From gene to structure: Unraveling genomic dark matter in Ca. Accumulibacter

The paper develops a method to annotate genomic dark matter in Ca. Accumulibacter by integrating pangenome analysis, protein structure prediction, and metatranscriptomics, significantly improving gene annotation coverage.