Improvement and Optimization of the A. H. Weeks Water Treatment Plant Processes, Windsor, ON, Canada

Advanced Oxidation Treatment of Drinking Water: Part II. Turbidity, Particles and Organics Removal from Lake Huron Water

“…Clearly, as can be observed from Figure 5, Train 2 filtered water exhibited much lower particle counts in the priority channels and thus indicate that O 3 /H 2 O 2 -based AOP would assist in improving finished water quality. In previous studies, Jasim et al (2008), Mazloum et al (2004), Gaubert et al (2000), Hall and Croll (1997), Anderson et al (1996) and Paode et al (1995) observed similar trends with ozone only. Paode et al (1995) also found that the addition of H 2 O 2 can enhance the particles removal capacity of lower doses of ozone and thus can reduce ozone dosage.…”

“…Furthermore monitoring particles in the size range of 2-20 µm is important as it corresponds to the size range for some pathogens ( Mazloum et al, 2006;Hall and Croll, 1997). Cryptosporidium oocysts are 3-5 µm with a spherical shape while Giardia cysts are ellipses with 8-14 µm length and 7-10 µm width (Mazloum et al, 2004).…”

“…Pre-coagulation ozonation also can effectively reduce coagulant doses by improving particle destabilization and aggregation, decrease the THMs precursors and also improve filtered and settled water turbidity (Farvardin and Collins, 1989;Chang and Singer, 1991;Anderson et al, 1996;Mazloum et al, 2004;Jasim et al, 2008). Moreover, pre-ozonation would decrease filter headloss and subsequently increase filter run times (Amirsardari et al, 1998;Jasim et al, 2008).…”

“…Moreover, pre-ozonation would decrease filter headloss and subsequently increase filter run times (Amirsardari et al, 1998;Jasim et al, 2008). Potential benefits of pre-coagulation ozonation have also been reflected in particles removal with filtered water having lower particle counts (Anderson et al, 1996;Mazloum et al, 2004;Gaubert et al, 2000;Jasim et al, 2008). Although many inconsistencies in the beneficial effects of ozonation prior to coagulation have been observed, almost invariably, studies suggest that low ozone doses would be more effective compared to higher doses, and that higher doses may even inhibit the coagulation process.…”

Impact of Ozone and Hydrogen Peroxide vs. UV and Hydrogen Peroxide on Chlorine Residual

“…It also minimizes trihalomethanes (THMs) precursors, and assists in turbidity and particles removal (Anderson et al, 1996;Chang and Singer 1991;Jasim et al, 2008;Mazloum et al, 2004;Rakness 2005). Advanced oxidation process (AOP) involves the oxidation of target contaminants by OH radicals.…”