Biofiltration as a pre-treatment for membranes

The Windsor Lake drinking water treatment plant (WLWTP) in St. John’s Newfoundland is a
microfiltration (MF) membrane plant. One shortcoming of membrane filtration is a phenomena called
fouling; fouling refers to the build up of rejected particles on the surface or into the membrane’s pores
that can negatively affect the membrane’s performance. Since it’s installment, WLWTP has
experienced high fouling rates, reducing permeate flux and requiring frequent chemical cleanings. The
proposed research project will look into reducing membrane fouling and thus membrane cleaning
frequencies by pre-treating the raw water with a biofilter to remove membrane foulants, namely
natural organic matter (NOM). By partnering with researchers at Dalhousie University, CBCL has an
opportunity to assess the potential of new biological filtration techniques to serve as an alternative to
coagulation in Atlantic Canada. By understanding the capabilities of biofiltration as a pre-treatment for
membranes, CBCL can work towards providing these solutions to their clients in the future.

Faculty Supervisor:

Graham Gagnon

Student:

Partner:

CBCL Ltd

Discipline:

Engineering

Sector:

Construction and infrastructure; Professional, scientific and technical services

University:

Dalhousie University

Program: