Ammonia-oxidizing bacteria (AOB) in nitrifying biofilters degrading four regulated trihalomethanes-trichloromethane, bromodichloromethane, dibromochloromethane, and tribromomethane-were related to Nitrosomonas oligotropha. N. oligotropha is associated with chloraminated drinking water systems, and its presence in the biofilters might indicate that trihalomethane tolerance is another reason that this bacterium is dominant in chloraminated systems.
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http://dx.doi.org/10.1128/AEM.02464-10 | DOI Listing |
Front Microbiol
December 2024
Department of Forestry and Rangeland Stewardship, Colorado State University, Fort Collins, CO, United States.
Land stewards in dryland ecosystems across the western U.S. face challenges to manage the exotic grass (cheatgrass), which is a poor forage, is difficult to remove, and increases risk of catastrophic fire.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
Departments of Molecular Biosciences and of Chemistry, Northwestern University, Evanston, IL 60208.
Methane- and ammonia-oxidizing bacteria play key roles in the global carbon and nitrogen cycles, respectively. These bacteria use homologous copper membrane monooxygenases to accomplish the defining chemical transformations of their metabolisms: the oxidations of methane to methanol by particulate methane monooxygenase (pMMO) and ammonia to hydroxylamine by ammonia monooxygenase (AMO), enzymes of prime interest for applications in mitigating climate change. However, investigations of these enzymes have been hindered by the need for disruptive detergent solubilization prior to structure determination, confounding studies of pMMO and precluding studies of AMO.
View Article and Find Full Text PDFWaste Manag
December 2024
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address:
Biofiltration is an important method for composting off-gas treatment. Compost-based materials are widely used as the filling media for biofilter. To expand the application of compost from different composting materials in off-gas control for organic waste aerobic composting, the NH removal efficiency, NO generation, and microbial communities of ammonia monooxygenase (amoA functional gene was selected) and nitrite reductase (nirS functional gene was selected) were investigated using the animal manure compost (AMC) and sludge compost (SC) as filling materials.
View Article and Find Full Text PDFBioresour Technol
December 2024
Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China.
Mainstream anammox faces challenges in adapting to non-optimal temperatures and managing greenhouse gas emissions. This study investigates nitrogen removal and NO emissions in attached-growth anammox reactors subjected to rapid temperature shifts (15-55 °C). Temperature reductions to 15-25 °C had minimal impact on the anammox bacterial populations, with nitrogen removal rates of 0.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Riverbank filtration (RBF) is an effective pretreatment technology for drinking water, removing organic micropollutants (OMPs) mainly through biodegradation. Despite documented improvements in OMP removal with extended adaptation time, the mechanisms remain poorly understood. This study assessed the removal of 128 OMPs over 82 d in a simulated RBF system, identified those with improved removal, and analyzed their properties.
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