AWWA WQTC69360

This powerpoint presentation begins by providing a brief overview of the City of Baltimore, Maryland, Fullerton Filtration Plant Study, that had the objective of providing a reliable barrier against tastes and odors (T&O). A brief overview of tastes and odors in drinking water is presented, along with the proposed T&O control strategy that included the following: utilize powdered activated carbon (PAC) as the primary T&O barrier; granular activated carbon (GAC) treatment as a secondary barrier (polishing step); although PAC treatment is highly effective, complete removal likely infeasible during severe T&O events; and, GAC to be included for Stage 2 compliance, protection against emerging contaminants. Testing plan, jar testing procedure, odor analysis, pilot-scale PAC evaluation, rapid small scale column tests, and pilot-scale GAC evaluation are covered. Presentation summary indicates the following: jar testing indicated that a wood-based PAC is best suited for this source water; pilot-scale testing demonstrated that 30 minute PAC contact time is sufficient, and that some MIB may remain after PAC treatment (i.e. there is a need for a secondary T&O barrier); and, RSSCTs / pilot-scale GAC columns demonstrated that GAC treatment adequately removes the MIB remaining after PAC treatment (even when GAC is no longer removing TOC). Includes figures.