AWWA ACE63176

This slide presentation outlines a study on the effect of pH and natural organic matter (NOM) on the removal of microcystin-LR by a powdered activated carbon-ultrafiltration (PAC-UF) system. Objectives of the study include: investigate the application of PAC-UF system for the removal of microcystin-LR; examine the effect of natural organic matter (NOM) on the removal of microcystin-LR by PAC adsorption, UF, and PAC-UF system; and, examine the effect of pH on the removal of microcystin-LR by three processes. Results outlined for the first objective include: process variables for the best process configuration; PAC process and type; UF (Ultrafiltration) process; membrane characteristics (Hydrophobicity, Pore size); and, hybrid PAC-UF system, membrane characteristics and PAC dosage. Results outlined of the second objective include: PAC process, the effect of NOM on PAC adsorption capacity for microcystin; UF (Ultrafiltration) process, the effect of NOM on the removal of microcystin by UF membranes - simultaneous and sequential addition of NOM and the effect of NOM-fouled membrane on rejection of microcystin; and, hybrid PAC-UF system and the effect of NOM on microcystin removal by PAC-UF. The third objective for future study includes: investigation of the effect of solution pH on the removal of microcystin-LR by three processes; and, PAC adsorption - the adsorption of microcystin on PAC decreased with increasing pH. Includes tables, figures.