Presentation - Hazen and Sawyer

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Wrap Up 26 • Algal toxins and algae related taste and odor outbreaks are both caused by seasonal, cyanobacteria outbreaks • Recent research has indicated that presence of taste and odor (geosmin particularly), correlates well with presence of algal toxins • UV Advanced Oxidation effectively degrades both T&O and algal toxins In general, MIB < Geosmin ~ Anatoxin
Parting thought… 27 “Drinking water purveyors frequently tell customers during taste-and-odor outbreaks that there are no health risks. In our study, however, taste-and-odor causing compounds were always accompanied by cyanotoxins, highlighting the need for water purveyors to increase cyanotoxin surveillance during taste-and-odor outbreaks so that treatment can be modified accordingly, and to verify that cyanotoxins are not present at or above thresholds of potential health risk.” Graham et al, 2010
Page 1 and 2: UV Advanced Oxidation for Treatment
Page 3 and 4: 3 Algae Issues • Seasonal algae b
Page 5 and 6: Cyanotoxins 5 • Some blue-green c
Page 7 and 8: Cyanotoxin Occurrence 7 Indiana dat
Page 9 and 10: Cyanotoxins and Taste and Odor 9
Page 11 and 12: Northeast Climate Projections 11
Page 13 and 14: 13 What can be done? • Algae bloo
Page 15 and 16: 15 UV/H 2 O 2 AOP • H 2 O 2 absor
Page 17 and 18: Differences between UV disinfection
Page 19 and 20: UV AOP for Algal Toxins UV and UV A
Page 21 and 22: Why UV AOP makes some sense 21 •
Page 23 and 24: Why UV AOP makes some sense 23 Nesh
Page 25: Byproducts 25 • In the case of UV

Presentation - Hazen and Sawyer

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