Frederik Hammes

Summary

Affiliation: Swiss Federal Institute of Aquatic Science and Technology
Country: Switzerland

Publications

  1. pmc Monitoring of dynamic microbiological processes using real-time flow cytometry
    Markus Arnoldini
    Department of Environmental Microbiology, Eawag Swiss Federal Institute for Aquatic Science and Technology, Dubendorf, Switzerland Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
    PLoS ONE 8:e80117. 2013
  2. doi request reprint Development and laboratory-scale testing of a fully automated online flow cytometer for drinking water analysis
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf 8600, Switzerland
    Cytometry A 81:508-16. 2012
  3. pmc Bacterial colonization of pellet softening reactors used during drinking water treatment
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
    Appl Environ Microbiol 77:1041-8. 2011
  4. ncbi request reprint Cultivation-independent assessment of bacterial viability
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dubendorf, Switzerland
    Adv Biochem Eng Biotechnol 124:123-50. 2011
  5. doi request reprint Measurement and interpretation of microbial adenosine tri-phosphate (ATP) in aquatic environments
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
    Water Res 44:3915-23. 2010
  6. pmc Critical evaluation of the volumetric "bottle effect" on microbial batch growth
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
    Appl Environ Microbiol 76:1278-81. 2010
  7. doi request reprint Development of biomass in a drinking water granular active carbon (GAC) filter
    Silvana Velten
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Duebendorf, Switzerland
    Water Res 45:6347-54. 2011
  8. doi request reprint Rapid, cultivation-independent assessment of microbial viability in drinking water
    Michael Berney
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Dubendorf, Switzerland
    Water Res 42:4010-8. 2008
  9. doi request reprint Flow cytometry and adenosine tri-phosphate analysis: alternative possibilities to evaluate major bacteriological changes in drinking water treatment and distribution systems
    Marius Vital
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, 8600 Dubendorf, Switzerland
    Water Res 46:4665-76. 2012
  10. ncbi request reprint Flow-cytometric total bacterial cell counts as a descriptive microbiological parameter for drinking water treatment processes
    Frederik 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

Collaborators

Detail Information

Publications30

  1. pmc Monitoring of dynamic microbiological processes using real-time flow cytometry
    Markus Arnoldini
    Department of Environmental Microbiology, Eawag Swiss Federal Institute for Aquatic Science and Technology, Dubendorf, Switzerland Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
    PLoS ONE 8:e80117. 2013
    ..These examples demonstrate the broad applicability of the method to diverse biological experiments, showing that it allows the collection of detailed, time-resolved information on complex processes. ..
  2. doi request reprint Development and laboratory-scale testing of a fully automated online flow cytometer for drinking water analysis
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf 8600, Switzerland
    Cytometry A 81:508-16. 2012
    ....
  3. pmc Bacterial colonization of pellet softening reactors used during drinking water treatment
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
    Appl Environ Microbiol 77:1041-8. 2011
    ....
  4. ncbi request reprint Cultivation-independent assessment of bacterial viability
    Frederik Hammes
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dubendorf, Switzerland
    Adv Biochem Eng Biotechnol 124:123-50. 2011
    ....
  5. doi request reprint Measurement and interpretation of microbial adenosine tri-phosphate (ATP) in aquatic environments
    Frederik 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...
  6. pmc Critical evaluation of the volumetric "bottle effect" on microbial batch growth
    Frederik 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...
  7. doi request reprint Development of biomass in a drinking water granular active carbon (GAC) filter
    Silvana 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...
  8. doi request reprint Rapid, cultivation-independent assessment of microbial viability in drinking water
    Michael Berney
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Dubendorf, Switzerland
    Water Res 42:4010-8. 2008
    ....
  9. doi request reprint Flow cytometry and adenosine tri-phosphate analysis: alternative possibilities to evaluate major bacteriological changes in drinking water treatment and distribution systems
    Marius 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...
  10. ncbi request reprint Flow-cytometric total bacterial cell counts as a descriptive microbiological parameter for drinking water treatment processes
    Frederik 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...
  11. doi request reprint Overnight stagnation of drinking water in household taps induces microbial growth and changes in community composition
    Karin 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...
  12. pmc Assessment and interpretation of bacterial viability by using the LIVE/DEAD BacLight Kit in combination with flow cytometry
    Michael 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...
  13. ncbi request reprint Formation of assimilable organic carbon (AOC) and specific natural organic matter (NOM) fractions during ozonation of phytoplankton
    Frederik 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...
  14. doi request reprint A microbiology-based multi-parametric approach towards assessing biological stability in drinking water distribution networks
    Karin Lautenschlager
    Eawag, Swiss Federal Institute for Aquatic Science and Technology, Uberlandstr 133, CH 8600 Dubendorf, 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...
  15. pmc Evaluating the growth potential of pathogenic bacteria in water
    Marius 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...
  16. doi request reprint Competition of Escherichia coli O157 with a drinking water bacterial community at low nutrient concentrations
    Marius 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...
  17. ncbi request reprint 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 communities
    Yingying 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
    ....
  18. ncbi request reprint Rapid and direct estimation of active biomass on granular activated carbon through adenosine tri-phosphate (ATP) determination
    Silvana 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...
  19. doi request reprint Isolation and characterization of low nucleic acid (LNA)-content bacteria
    Yingying 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...
  20. ncbi request reprint Permeability of low molecular weight organics through nanofiltration membranes
    Sébastien 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...
  21. ncbi request reprint Growth of Vibrio cholerae O1 Ogawa Eltor in freshwater
    Marius 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...
  22. ncbi request reprint Influence of size, shape, and flexibility on bacterial passage through micropore membrane filters
    Yingying 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
    ....
  23. doi request reprint The impact of industrial-scale cartridge filtration on the native microbial communities from groundwater
    Yingying 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
    ....
  24. doi request reprint Stabilization of flux during dead-end ultra-low pressure ultrafiltration
    Maryna Peter-Varbanets
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Uberlandstrasse 133, 8600 Dubendorf, Switzerland
    Water Res 44:3607-16. 2010
    ....
  25. ncbi request reprint Chemical extraction of microorganisms from water-saturated, packed sediment
    Fabio Ugolini
    Institute for Biogeochemistry and Pollutant Dynamics, ETH Zurich, Universitatstrasse 16, CH 8092 Zurich, Switzerland
    Water Environ Res 85:503-13. 2013
    ..These results suggest that comparison of communities extracted by different DPAs can provide improved information on the occurrence of rare microbial groups in biofilms...
  26. doi request reprint 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 permanganate
    Maaike 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...
  27. ncbi request reprint Mechanistic and kinetic evaluation of organic disinfection by-product and assimilable organic carbon (AOC) formation during the ozonation of drinking water
    Frederik Hammes
    Swiss Federal Institute for Aquatic Science and Technology, Eawag, Uberlandstr 133, CH 8600, Dubendorf, 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...
  28. doi request reprint Cytometric methods for measuring bacteria in water: advantages, pitfalls and applications
    Frederik 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...
  29. pmc Biological instability in a chlorinated drinking water distribution network
    Alina Nescerecka
    Department of Water Engineering and Technology, Riga Technical University, Riga, Latvia Department of Environmental Microbiology, Eawag, Swiss Federal Institute for Aquatic Science and Technology, Dubendorf, Switzerland
    PLoS ONE 9:e96354. 2014
    ..In addition, it underlines the complexity of full-scale drinking water distribution systems, and the resulting challenges to establish the causes of biological instability. ..
  30. pmc Kinetics and yields of pesticide biodegradation at low substrate concentrations and under conditions restricting assimilable organic carbon
    Damian E Helbling
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Environmental Microbiology, Dubendorf, Switzerland
    Appl Environ Microbiol 80:1306-13. 2014
    ..Our work provides novel insights into the kinetics of biodegradation processes and growth yields at low substrate concentrations. ..