submerged anaerobic membrane bioreactors for wastewater treatment and membrane fouling characterization and control
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.