M. Laureni

Long-term multi-meta-omics resolves the ecophysiological controls of seasonal N2O emissions

This study uses long-term multi-meta-omics to identify the ecophysiological controls of seasonal N2O emissions in wastewater treatment systems.

A difficult coexistence: resolving the iron-induced nitrification delay in groundwater filters

This study identifies Fe3+ flocs as the main cause of nitrification delay in groundwater filters by inhibiting NH4+ oxidation, showing the inhibition is reversible through backwashing.

Shifting to biology promotes highly efficient iron removal in groundwater filters

This study shows that mild aeration in sand filters promotes biological iron removal, achieving faster oxidation rates and higher water yields compared to intensive aeration.

"Candidatus Siderophilus nitratireducens": a psychrophilic, nap-dependent nitrate-reducing iron oxidizer within the new order Siderophiliales

The paper identifies a new nitrate-reducing iron-oxidizing bacterium in groundwater, demonstrating its lithoautotrophic growth and metabolic pathway.

Aerobic denitrification as N2O source in microbial communities

The paper quantifies aerobic denitrification's contribution to N2O emissions in microbiomes with frequent oxic/anoxic transitions, showing it can respire a third of organic substrate with nitrate and produce up to a quarter of aerobically respired nitrate as N2O.

Microbiome, resistome and mobilome of chlorine-free drinking water treatment systems

This study analyzes antibiotic resistance determinants in chlorine-free drinking water treatment plants using metagenomics and quantitative PCR, finding reduced ARGs and MGEs despite increases in disinfection sub-units.

Meta-omics profiling of full-scale groundwater rapid sand filters explains stratification of iron, ammonium and manganese removals

The paper uses metaproteomics to analyze full-scale groundwater filters and shows how microbial protein expression stratifies with nutrient availability, explaining iron, ammonium, and manganese removal patterns.

Adaptation of anammox bacteria to low temperature via gradual acclimation and cold shocks: distinctions in protein expression, membrane composition and activities

This study compares gradual temperature decrease and cold shocks for adapting anammox bacteria to low temperatures, finding cold shocks more effective in maintaining metabolic activity and protein expression.

On anammox activity at low temperature: effect of ladderane composition, process conditions and dominant anammox population

This study investigates how anammox activity is affected by temperature and lipid composition in 14 anammox communities, finding that lipid structure and cold adaptation significantly influence performance at low temperatures.