News
08
2022
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11
MBR membrane in sewage treatment should be how to maintain?
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MBR membrane separation technology, as a high-efficiency and low-pollution purification technology, has the advantages of simple operation, convenient maintenance, low energy consumption and strong adaptability. It has been gradually recognized and used by environmental protection workers and environmental protection workers.
Check whether the aeration air volume is standard and whether the aeration is uniform. When it is found that the aeration air volume is abnormal and the aeration is obviously uneven, effective solutions need to be taken: such as removing fouling of the aeration pipe, checking the condition of the equipment, checking the blower, adjusting the aeration, etc.
The stability of the transmembrane pressure difference was checked. A sudden rise in the transmembrane pressure difference means membrane blockage, which may be caused by abnormal aeration or deterioration of sludge performance. In this case, check the following parameters and take necessary measures, such as chemical cleaning of the membrane module.
When cleaning MBR membranes, oxalic acid (0.5% concentration) or sodium hypochlorite (0.5% concentration) are generally used. Before cleaning, the suction pump and blower should be turned off. The drug solution flows into the membrane by gravity through the inlet of the device at the upper part of the membrane module. The amount of injected liquid should be controlled according to the amount given in the operating instructions. Generally, each film should be cleaned, and the amount of each tablet is 3. L/about 5L.
After injecting the liquid medicine, stop soaking for about 1~3h, and then use the pump to discharge the liquid. If necessary, inject hydrochloric acid or equal medicine, stop soaking for 1~3h and then discharge the liquid medicine with suction pump. The whole cleaning process will continue for 4~5 hours. After MBR membrane cleaning, membrane flux can be restored.
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