A5103230221- Wastewater Treatment and Nitrogen Removal
- Microbial Fuel Cells and Bioremediation
- Microbial Community Ecology and Physiology
- Constructed Wetlands for Wastewater Treatment
- Water Treatment and Disinfection
- Liver Disease Diagnosis and Treatment
- Acute Ischemic Stroke Management
- Ammonia Synthesis and Nitrogen Reduction
- Pharmaceutical and Antibiotic Environmental Impacts
- Phosphorus and nutrient management
- Membrane Separation Technologies
- Genomics and Rare Diseases
- Bacterial biofilms and quorum sensing
- Environmental DNA in Biodiversity Studies
- Aortic Disease and Treatment Approaches
- Gut microbiota and health
- Water-Energy-Food Nexus Studies
- Aortic aneurysm repair treatments
- Antibiotic Resistance in Bacteria
- Cellular Mechanics and Interactions
- Immunodeficiency and Autoimmune Disorders
- Optical Coherence Tomography Applications
- Marine and coastal ecosystems
- Mass Spectrometry Techniques and Applications
- SARS-CoV-2 detection and testing
Northwestern University
2016-2025
University of Ottawa
2007-2024
Northwestern University
2024
University of California, Santa Cruz
2024
Nepean Hospital
2019-2020
Ottawa Heart Institute
2019-2020
Swiss Federal Institute of Aquatic Science and Technology
2012-2017
Stanford University
2006-2014
ETH Zurich
2012
University of Milan
2010
It has long been assumed that differences in the relative abundance of taxa microbial communities reflect environmental conditions. Here we show economically and environmentally important a wastewater treatment plant, population dynamics are consistent with neutral community assembly, where chance random immigration play an predictable role shaping communities. Using dynamic observations, demonstrate straightforward calibration purely model parsimonious method to incorporate influence on...
Microbial fuel cells (MFCs) harness the metabolism of microorganisms, converting chemical energy into electrical energy. Anode performance is an important factor limiting power density MFCs for practical application. Improving anode design thus enhancing MFC performance, but only a little development has been reported. Here, we describe biocompatible, highly conductive, two-scale porous fabricated from carbon nanotube−textile (CNT−textile) composite high-performance MFCs. The macroscale...
ABSTRACT We report molecular evidence that ammonia-oxidizing archaea (AOA) occur in activated sludge bioreactors used to remove ammonia from wastewater. Using PCR primers targeting archaeal monooxygenase subunit A ( amoA ) genes, we retrieved and compared 75 sequences five wastewater treatment plants operating with low dissolved oxygen levels long retention times. All of these showed similarity previously found soil sediments, they were distributed primarily four major phylogenetic clusters....
Nitrous oxide (N(2)O) is an environmentally important atmospheric trace gas because it effective greenhouse and leads to ozone depletion through photo-chemical nitric (NO) production in the stratosphere. Mitigating its steady increase concentration requires understanding of mechanisms that lead formation natural engineered microbial communities. N(2)O formed biologically from oxidation hydroxylamine (NH(2)OH) or reduction nitrite (NO(-) (2)) NO further N(2)O. Our review biological pathways...
The COVID-19 pandemic has severely impacted public health and the worldwide economy. Converging evidence from current pandemic, previous outbreaks controlled experiments indicates that SARS-CoVs are present in wastewater for several days, leading to potential risks via waterborne aerosolized pathways. Conventional treatment provides only partial removal of SARS-CoVs, thus safe disposal or reuse will depend on efficacy final disinfection. This underscores need a risk assessment management...
The control of nitrite-oxidizing bacteria (NOB) challenges the implementation partial nitritation and anammox (PN/A) processes under mainstream conditions. aim present study was to understand how operating conditions impact microbial competition NOB in hybrid PN/A systems, where biofilm flocs coexist. A moving-bed reactor (MBBR; also referred as integrated fixed film activated sludge or IFAS) operated at 15 °C on aerobically pre-treated municipal wastewater (23 mgNH4-N L-1)....
Wastewater treatment plants (WWTPs) release treated effluent containing mobile genetic elements (MGEs), antibiotic resistance genes (ARGs), and microorganisms into the environment, yet little is known about their influence on nearby microbial communities retention of these factors in receiving water bodies. Our research aimed to characterize organisms from two different WWTPs that discharge Lake Michigan, as well surrounding lake sediments determine dispersal fate with respect distance...
Ammonia-oxidizing bacteria (AOB) have long been considered key to the removal of nitrogen in activated sludge bioreactors. Culture-independent molecular analyses established that AOB lineages bioreactors are dynamic, but underlying operational or environmental factors unclear. Furthermore, contribution ammonia-oxidizing archaea (AOA) has not studied. To this end, we investigated abundance AOA and as well correlations between dynamics parameters at a municipal wastewater treatment plant...
The human gut microbiota is an important reservoir of antibiotic resistance genes (ARGs). A metagenomic approach and network analysis were used to establish a comprehensive resistome catalog obtain co-occurrence patterns between ARGs microbial taxa in fecal samples from 180 healthy individuals 11 different countries. In total, 507 ARG subtypes belonging 20 types detected with abundances ranging 7.12 × 10-7 2.72 10-1 copy ARG/copy 16S-rRNA gene. Tetracycline, multidrug,...
Enhancing activated sludge dewaterability is of scientific and engineering importance in the face accelerated urbanization stringent environmental regulations. In this study, we investigated integration acidification ultrasound (A/US) treatment for improving at both bench- pilot-scales. Our results showed that A/US process exhibited significantly improved dewatering performance, characterized by capillary suction time, cake moisture, water/solid content cake. Synergistic mechanisms were...
A new process for the removal of nitrogen from wastewater is introduced. The involves three steps: (1) partial nitrification NH4+ to NO2−; (2) anoxic reduction NO2− N2O; and (3) N2O conversion N2 with energy recovery by either catalytic decomposition O2 or use oxidize biogas CH4. Steps 1 3 have been previously established at full-scale. Accordingly, bench-scale experiments focused on step 2. Two strategies were evaluated found be effective: in first, Fe(II) was used abiotically reduce...
<h3>Importance</h3> Among patients with ST-segment elevation myocardial infarction (STEMI) referred for primary percutaneous coronary intervention (PCI), a survival benefit associated radial access compared femoral remains controversial. <h3>Objective</h3> To assess whether there is when used instead of among STEMI PCI. <h3>Design, Setting, and Participants</h3> This multicenter, open-label, randomized clinical trial was conducted at 5 PCI centers in Canada. In total, 2292 were enrolled...
Combined partial nitritation-anammox (PN/A) systems are increasingly being employed for sustainable removal of nitrogen from wastewater, but process instabilities present ongoing challenges practitioners. The goal this study was to elucidate differences in stability between PN/A variations employing two distinct aggregate types: biofilm [in moving bed reactors (MBBRs)] and suspended growth biomass. Triplicate each variation were studied under baseline conditions response a series transient...