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    Submerged anaerobic membrane bioreactors for wastewater treatment and membrane fouling characterization and control

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    Date

    2012-11-10

    Author

    Gao, Weijue

    Degree

    Ph.D.

    Discipline

    Biotechnology

    Subject

    Submerged anaerobic membrane bioreactor
    ph shock
    Biogas production
    Sludge properties
    Micro-tome slicing
    Pulp and paper effluent

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    Abstract

    This thesis focused on effects of transient conditions (pH shocks, temperature variation and temperature shocks) on the performance and membrane fouling characterization and control of submerged anaerobic membrane bioreactors (SAnMBR) for pulp and paper effluent treatment (thermomechanical whitewater and pressate). A comprehensive characterization of cake layer formed on membrane surfaces was conducted using various techniques. Results show that a pH 8.0 shock had a minor impact, while pH 9.1 and 10.0 shocks exerted significant long-lasting negative impacts on performance of the SAnMBR. The SAnMBR system was highly resilient and could successfully tolerate the 5 °C/10 °C temperatures shocks at 37 °C and the temperature variations from 37 to 45 °C. The temperature shock of 5 °C and 10 °C at 45 °C led to slight disturbance and significant disturbance of the performance, respectively.

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    http://knowledgecommons.lakeheadu.ca/handle/2453/326

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