Ozone Chemically-Enhanced Backwashes For Ceramic Membrane Fouling Control in Cyanobacteria-Laden Surface Water Applications

Abstract

Membranes have been shown to be e↵ective physical barriers against cyanobacteria, however, membrane fouling in surface waters impacted by cyanobacteria is poorly controlled and results in high operating costs. A possible solution is the chemicallyenhanced backwash (CEB), a cleaning strategy in which a chemical is combined with a hydraulic backwash for in-situ fouling control. This research investigates the po-Firstly, I would like to thank my two supervisors: Dr. Onita Basu and Dr. Benoit Barbeau. Their guidance and unwavering optimism throughout all stages of this research was motivating and much appreciated. I am very grateful for the opportunities that were given to me. As a whole, this project was a great learning experience and has helped shape my career path. A la Polytechnique de Montréal, j'aimerais remercier l'équipe de techniciens du

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

“…82 However, in situ ozonation for membrane fouling control requires large ozone concentrations, making it uneconomical for full-scale applications. 83…”

“…82 However, in situ ozonation for membrane fouling control requires large ozone concentrations, making it uneconomical for full-scale applications. 83 In the last decade, the use of an FeCl 3 system in order to reduce membrane fouling has received much attention. 78,84 Flocculants reduce fouling based on charge neutralization, bridge formation and electrostatic patch mechanisms; 85 therefore, FeCl 3 reduces fouling by weakening the repulsion between SMP, causing them to agglomerate to become larger particles.…”