Thickening of Sludge from DAF process by Flotation; Application of Solid Flux Theory and Effective Factors

摘要: Compared with the sludge from gravity sedimentation, it is difficult for operations to settle occurred dissolved-air-flotation (DAF). Even though there are some problems in treating DAF conventional thickeners, those has been used until now. In this study, Solid Flux theory thickening was applied of through flotation order develop new methodology treatment sludge. Also, characteristics were investigated. From experiment results, revealed that higher polymer dosage, at fixed solid concentration, greater rising velocity becomes. When we flux theory, relationship, which similar thickening, achieved. could find proper dosage about 50 mg/L. Consequently, limiting can be derived relationship between total and withdrawal Furthermore, factors, such as concentrations, bubble volume, pH, zeta potential, temperature, have effects on sedimentation treatment.