Research Topics
| Frederik HammesSummaryAffiliation: Swiss Federal Institute of Aquatic Science and Technology Country: Switzerland Publications
| Collaborators
|
Detail Information
Publications
Development and laboratory-scale testing of a fully automated online flow cytometer for drinking water analysisFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf 8600, Switzerland
Cytometry A 81:508-16. 2012....
Critical evaluation of the volumetric "bottle effect" on microbial batch growthFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Appl Environ Microbiol 76:1278-81. 2010..We examined six bottle sizes (20 to 1,000 ml) using three independent enumeration methods to quantify growth. We found no evidence of a so-called volumetric bottle effect, thus contradicting numerous previous reports...- Bacterial colonization of pellet softening reactors used during drinking water treatmentFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Appl Environ Microbiol 77:1041-8. 2011.... - Cultivation-independent Assessment of Bacterial ViabilityFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dubendorf, Switzerland
Adv Biochem Eng Biotechnol 124:123-50. 2011.... - Measurement and interpretation of microbial adenosine tri-phosphate (ATP) in aquatic environmentsFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Water Res 44:3915-23. 2010..95x10(-9)nmol/microm(3) was calculated. These results support the use of ATP analysis for both routine monitoring and research purposes, and contribute towards a better interpretation of ATP data... - Development of biomass in a drinking water granular active carbon (GAC) filterSilvana Velten
Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Duebendorf, Switzerland
Water Res 45:6347-54. 2011..This study shows that the combination of different analytical methods allows detailed quantification of the microbiological activity in drinking water biofilters... - Rapid, cultivation-independent assessment of microbial viability in drinking waterMichael Berney
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Dubendorf, Switzerland
Water Res 42:4010-8. 2008.... - Flow cytometry and adenosine tri-phosphate analysis: alternative possibilities to evaluate major bacteriological changes in drinking water treatment and distribution systemsMarius Vital
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, 8600 Dubendorf, Switzerland
Water Res 46:4665-76. 2012..This work demonstrates the value of alternative microbial methods for process/system control, optimization and routine monitoring of the general microbial quality of water during treatment and distribution... 
Flow-cytometric total bacterial cell counts as a descriptive microbiological parameter for drinking water treatment processesFrederik Hammes
Swiss Federal Institute of Aquatic Science and Technology EAWAG, P O Box 611, Uberlandstr 133, CH 8600 Dubendorf, Switzerland
Water Res 42:269-77. 2008..We have shown that total cell concentration measured with FCM is a rapid, easy, sensitive and importantly, a descriptive parameter of several widely applied drinking water treatment processes...- Overnight stagnation of drinking water in household taps induces microbial growth and changes in community compositionKarin Lautenschlager
Eawag, Swiss Federal Institute for Aquatic Science and Technology, Uberlandstrasse 133, CH 8600 Dubendorf, Switzerland
Water Res 44:4868-77. 2010..However, a simple mitigation strategy would be a short flushing of taps prior to use... - Assessment and interpretation of bacterial viability by using the LIVE/DEAD BacLight Kit in combination with flow cytometryMichael Berney
Swiss Federal Institute of Aquatic Science and Technology, Eawag, P O Box 611, CH 8600 Dubendorf, Switzerland
Appl Environ Microbiol 73:3283-90. 2007..Our observations add a new aspect to the LIVE/DEAD stain, which so far was believed to be dependent only on cytoplasmic membrane permeability... - Evaluating the growth potential of pathogenic bacteria in waterMarius Vital
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, Switzerland
Appl Environ Microbiol 76:6477-84. 2010..The proposed approach provides a first step for including pathogen growth into microbial risk assessment... - Competition of Escherichia coli O157 with a drinking water bacterial community at low nutrient concentrationsMarius Vital
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department for Environmental Microbiology, Dubendorf, Switzerland
Water Res 46:6279-90. 2012..The study provides new insights into the principles governing competition of an enteric pathogen with autochthonous aquatic bacteria... - Formation of assimilable organic carbon (AOC) and specific natural organic matter (NOM) fractions during ozonation of phytoplanktonFrederik Hammes
Swiss Federal Institute for Aquatic Science and Technology, Eawag, Uberlandstr 133, CH 8600, Dubendorf, Switzerland
Water Res 41:1447-54. 2007..It is therefore conceivable that strategies for the removal of phytoplankton before pre-ozonation should be considered during the design of drinking water treatment installations, particularly when surface water is used... - Rapid and direct estimation of active biomass on granular activated carbon through adenosine tri-phosphate (ATP) determinationSilvana Velten
Swiss Federal Institute for Aquatic Science and Technology Eawag, P O Box 611, Uberlandstr 133, CH 8600, Dubendorf, Switzerland
Water Res 41:1973-83. 2007..9 x 10(9)cells/g GAC DW. It was shown that the method can be used to determine the biomass attached to the GAC for both stable and developing biofilms... - Quantification of the filterability of freshwater bacteria through 0.45, 0.22, and 0.1 microm pore size filters and shape-dependent enrichment of filterable bacterial communitiesYingying Wang
Department of Environmental Microbiology, Swiss Federal Institute of Aquatic Science and Technology EAWAG, PO Box 611, Uberlandstrasse 133, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 41:7080-6. 2007.... - Permeability of low molecular weight organics through nanofiltration membranesSébastien Meylan
Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf, Switzerland
Water Res 41:3968-76. 2007..This indicates that the drinking water produced by NF might be biologically unstable in the distribution system. Nevertheless, in comparison with the raw water, NF significantly reduced the AOC concentration... - Isolation and characterization of low nucleic acid (LNA)-content bacteriaYingying Wang
Department of Environmental Microbiology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, Switzerland
ISME J 3:889-902. 2009..Their isolation and cultivation allow further detailed investigation of this group of organisms under defined laboratory conditions... - Growth of Vibrio cholerae O1 Ogawa Eltor in freshwaterMarius Vital
Swiss Federal Institute for Aquatic Science and Technology Eawag, Dubendorf, Switzerland
Microbiology 153:1993-2001. 2007..cholerae has the ability to gain access to the substrates present in freshwater even in competition with an autochthonous bacterial lake water consortium... - Stabilization of flux during dead-end ultra-low pressure ultrafiltrationMaryna Peter-Varbanets
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Uberlandstrasse 133, 8600 Dubendorf, Switzerland
Water Res 44:3607-16. 2010.... - Influence of size, shape, and flexibility on bacterial passage through micropore membrane filtersYingying Wang
Department of Environmental Microbiology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 42:6749-54. 2008.... - The impact of industrial-scale cartridge filtration on the native microbial communities from groundwaterYingying Wang
Department of Environmental Microbiology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Uberlandstrasse 133, CH 8600 Dubendorf, Switzerland
Water Res 42:4319-26. 2008.... - Kinetics of membrane damage to high (HNA) and low (LNA) nucleic acid bacterial clusters in drinking water by ozone, chlorine, chlorine dioxide, monochloramine, ferrate(VI), and permanganateMaaike K Ramseier
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH 8600 Duebendorf, Switzerland
Water Res 45:1490-500. 2011..Based on the different reactivity of these oxidants it was suggested that HNA and LNA bacterial cell membranes have a different chemical constitution... - A microbiology-based multi-parametric approach towards assessing biological stability in drinking water distribution networksKarin Lautenschlager
Eawag, Swiss Federal Institute for Aquatic Science and Technology, Uberlandstr 133, CH 8600 Dubendorf, Switzerland ETH Zürich, Institute of Biogeochemistry and Pollutant Dynamics, CH 8092 Zurich, Switzerland
Water Res 47:3015-25. 2013..Our findings demonstrate that the multi-parametric approach used provides a powerful and sensitive tool to assess and evaluate biological stability and microbial processes in drinking water distribution systems... - Mechanistic and kinetic evaluation of organic disinfection by-product and assimilable organic carbon (AOC) formation during the ozonation of drinking waterFrederik Hammes
Swiss Federal Institute for Aquatic Science and Technology, Eawag, Uberlandstr. 133, CH-8600, , Switzerland
Water Res 40:2275-86. 2006..Thus, the kinetic and mechanistic information gained during the laboratory-scale experiments can be utilised for upscaling to full-scale water treatment plants... - Cytometric methods for measuring bacteria in water: advantages, pitfalls and applicationsFrederik Hammes
Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf, Switzerland
Anal Bioanal Chem 397:1083-95. 2010..This review focuses on the information that can be gained from the analysis of bacteria in water, highlighting some of the main advantages, pitfalls and applications...