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Published on: February 13, 2016
Ceramic membrane ultrafiltration of natural surface water with ultrasound enhanced backwashing
A Boley1, K Narasimhan, M Kieninger
1Institute for Sanitary Engineering, Water Quality and Solid Waste Management, University of Stuttgart, D-70569 Stuttgart, Germany.angela.boley@iswa.uni-stuttgart.de
Abstract:
Ultrafiltration membrane cleaning with ultrasound enhanced backwashing was investigated with two ceramic membrane systems in parallel. One of them was subjected to ultrasound during backwashing, the other acted as a reference system. The feed water was directly taken from a creek with a sedimentation process as only pre-treatment. The cleaning performance was improved with ultrasound but after 3 weeks of operation damages occurred on the membranes. These effects were studied with online measurements of flux, trans-membrane-pressure and temperature, but also with integrity tests, turbidity measurements and visual examination.
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