1. Water Treatment Plant Evaluation Protocol for HABs. This presentation will summarize an optional protocol for water treatment plants that want to evaluate their ability to optimize treatment for cyanobacteria and cyanotoxins. The protocol was developed in partnership with Ohio EPA through the course of four pilot comprehensive performance evaluations (CPEs). Evaluations are intended to be comprehensive, such that factors that could limit treatment performance during a HAB are identified by evaluating plant administration, operations, maintenance and design. Concepts and studies developed during the pilot project have been used by U.S. EPA and Ohio EPA staff to provide technical support related to HAB treatment. US EPA is in the process of finalizing the draft protocol for publication on the Agency’s website.

2. Treatment Options for HABs Impacted Waters. This presentation will focus on the removal of cyanobacterial biomass through the conventional treatment process: coagulation, flocculation, sedimentation, and filtration. It will also cover the removal of the toxins microcystin, cylindrospermopsin, and anatoxin through variations of the conventional treatment process: potassium permanganate application, powdered activated carbon (PAC) application, and chlorination. The presentation will conclude with data showing correlations between microcystin analyses performed by the ELISA and LC/MS/MS methods.

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