Department Events

Events

  • Nov
    8

    SPREE Seminar: Dominic Frigon

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    Microbial Immigration through the Urban Water Cycle: Importance for Process Modeling and System Dynamics Prediction

    Abstract:
    The wastewater industry is under increasing pressure to meet ever more stringent discharge regulations, improve water resource recovery, and expand removal of emerging contaminants. The diverse microbial communities found along the urban water cycle are fundamental for the engineering of biological processes to meet these challenges. However, current practices often neglect immigration between sections of the cycles; for example, from the sewer to the wastewater resource recovery facility. High-throughput amplicon sequencing now allows the detection of low abundance taxa, improving the description of the immigration process. With this approach, we analysed the impact of sewer immigration on the activity of nitrifiers, ordinary heterotrophs, and phosphate-accumulating organisms in full-scale and laboratory-scale activated sludge wastewater bioreactors. For nitrifiers, we demonstrated at full-scale plant the important and ecologically neutral transfer (i.e., without selection) of nitrifying populations between the sewer and the activated sludge system. Considering influent nitrifiers resulted in a 30% reduction of the maximum growth rate used to model the activated sludge, which could correspond to an equivalent reduction in plant size. At laboratory-scale, we confirmed that complete nitrification can be restored by sewer immigration in activated sludge system operated at SRTs below wash out. For heterotrophs, we showed that respirometry assays to assess biomass concentrations in wastewater influent overestimate immigration rates because the assays neglect ecological selection. In addition, immigration appears to impact more the populations consuming readily degradable substrates than slowly degradable substrates, suggesting complex ecological interactions among heterotrophs. These data will contribute to the site-specific optimization of wastewater resource recovery facilities, and to understand the significance of sewer systems in structuring activated sludge microbial communities.

    Biography:
    Dominic Frigon is an Associate Professor of environmental engineering in the Civil Engineering Dept. at McGill University (Montreal, Canada). He holds BSc and MSc degrees in Microbiology from McGill (Montréal) and a Ph.D. in Environmental Engineering from the University of Illinois (Urbana-Champaign). He specializes in biological wastewater treatment, organic resource recovery, and biosolids safety, with emphasis on the characterization of microbial communities with metagenomics and mathematical modeling. He directs a team of several Masters and Ph.D. students currently working on innovative systems for producing biomaterials and energy from waste, for limiting the dispersal of antimicrobial resistance, and for reducing excess biosolids while improving their microbiological qualities. Finally, his work also extends to sewer systems, where his team develops strategies to engineer sewer microbial communities and impact microbial activities inside wastewater resource recovery facilities.

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    TIME Friday, November 8, 2019 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    15

    EES Seminar: Patricio Carnelli

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 15, 2019 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    20

    SPREE Seminar: Chloé Arson

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, November 20, 2019 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    22

    EES Seminar: Paul Roots

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 22, 2019 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    27

    Thanksgiving vacation begins 6 p.m.

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    EVENT DETAILS

    TIME Wednesday, November 27, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Nov
    28

    Thanksgiving Day

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    TIME Thursday, November 28, 2019

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  • Dec
    2

    Fall Classes resume 8 a.m.

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    EVENT DETAILS

    TIME Monday, December 2, 2019

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  • Dec
    3

    Our Future with Robots

    McCormick School of Engineering and Applied Science

    3:30 PM ITW classroom, 1-350, Ford Motor Company Engineering Design Center

    EVENT DETAILSmore info

    TIME Tuesday, December 3, 2019 at 3:30 PM - 6:00 PM

    LOCATION ITW classroom, 1-350, Ford Motor Company Engineering Design Center    map it

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    CONTACT Northwestern Engineering Events    mccormick-events@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Dec
    6

    EES Seminar: Fangqiong Ling

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, December 6, 2019 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    6

    EES Seminar: Fangqiong Ling

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, December 6, 2019 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    7

    Fall classes end

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    EVENT DETAILS

    TIME Saturday, December 7, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Dec
    9

    Fall examinations begin

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    EVENT DETAILS

    TIME Monday, December 9, 2019

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  • Dec
    14

    Winter Break Begins

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    EVENT DETAILS

    TIME Saturday, December 14, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Dec
    14

    Northwestern Engineering PhD Hooding and Master's Recognition Ceremony

    McCormick School of Engineering and Applied Science

    4:00 PM Pick-Staiger Concert Hall

    EVENT DETAILS

    TIME Saturday, December 14, 2019 at 4:00 PM - 5:30 PM

    LOCATION Pick-Staiger Concert Hall    map it

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    CONTACT Paula Straaton    p-straaton@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Dec
    26

    Winter Recess - University Closed

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    EVENT DETAILS

    TIME Thursday, December 26, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Dec
    27

    Winter Recess - University Closed

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    EVENT DETAILS

    TIME Friday, December 27, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Dec
    30

    Winter Recess University Closed

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    EVENT DETAILS

    TIME Monday, December 30, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Dec
    31

    New Year's Eve

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    EVENT DETAILS

    TIME Tuesday, December 31, 2019

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Jan
    1

    New Year's Day

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    EVENT DETAILS

    TIME Wednesday, January 1, 2020

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Jan
    6

    Winter Classes begin 8 a.m.

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    EVENT DETAILS

    TIME Monday, January 6, 2020

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