Membrane air flow rates and HF sludging phenomenon in SMBR

摘要: This paper sets out to characterize the sludging dynamics in a MBR hollow fibre system. Rates of sludge accumulation inside membrane bundle and rates removal by aeration are evaluated order reach optimal use aeration, avoiding any irreversible sludging. Experiments were performed submerged bioreactor. Capillary modules placed on outside bioreactor side stream position. Air was injected below each module, ensuring vertical air lift circulation. During experiments, two flow compared (100 300 L/h). Some bubbling characteristics described terms bubble size penetration HF bundle. Results showed that appeared as determining criterion minimize when filtering under intensive conditions (30 LMH permeate flux, 8–10 g/L TSS) with an rate L/H allowing continuous functioning, 100 L/h which did not. Specific experiments evaluate from high capacity remove bundles soon no dead zones appeared. These corresponded local dried (10–12% DM). The compactness such deposit non-reversible even practising higher rate, inducing more filtration condition working zone