Membrane autopsy of a 10Â year old hollow fibre membrane from Sydney Olympic Park water reclamation plant

► Autopsy can understand change in properties of old membranes after long operation. ► Membrane becomes less negatively charged with age increasing its fouling potential. ► Old membrane material appears less flexible and brittle may cause integrity problems. ► Si, Ca, biopolymers and humic substances were the major membrane foulants.