Abstract ▼ AI-Helper

Membrane technologies have been used frequently in industries, taking advantage of that it is energy-saving and employable in relatively large scale. The fact that a non-mass separating agent is used in mild conditions without phase change in membrane separation makes it a method of choice in the re...

Membrane technologies have been used frequently in industries, taking advantage of that it is energy-saving and employable in relatively large scale. The fact that a non-mass separating agent is used in mild conditions without phase change in membrane separation makes it a method of choice in the recovery of biological materials. Recently, the development of noble separating modules has been solving the inherent problems in membrane separation, the fouling and the concentration polarization. In addition, membrane separation has broadened its applications from the conventional crude separation to the purificational use by the advent of the new and functional membrane materials. The role of membrane technologies is expected to be enormous in the production and recovery of biological products, considering the excellent applicability of membrane in the fields of integrated separation and in-situ separation, the two trends in modem bioseparation. This study was examined the feasibility of applying a Intermittently Internal Recycle Membrane Bioreactor to household wastewater treatment. The bioreactor was intermittently recycle to alternate anaerobic/anoxic condition while fild was entered the early stage of anoxic period and membrane filtration occurred during aeration period. With about 5,000mg/L of MLSS , 94.4% of TCOD_(Mn), 49.6% of TN and 56.8% TP, With about 10,000mg/L of MLSS 94.0% of TCOD_(Mn),51.3% of TN and 49.7% of TP and With about 10,000mg/L of MLSS(anoxic 1hr, anaerobic 2hr) 96.6% of TCOD_(Mn), 67.2% of TN and 53.0% of TP could be removed. After operating for about 100 days without the operation and transmembrane pressure increased slightly from 0.026 kgf/㎠ to 0.056 kgf/㎠(Hydrophilic membrane). No sludge wasting had no problem about membrane filtration. Therefore, this study confirmed the possibility of the domestic water treatment using membrane bioreactor process with Intermittently internal recycle.

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