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How to clean MBR membrane components in the later stage of use is a problem that many users are very concerned about. Today, we teach you how to solve the pollution and blockage problems of MBR membrane components.
1. Enhanced pretreatment: pretreatment is very important for MBR process. Sewage contains a lot of impurities, fibers and suspended matter, will block the membrane surface, thereby reducing the membrane penetration area, resulting in membrane pollution. Install a fine filter screen less than 1mm; A fine filter is installed on the flow measurement of the biological tank. Install a fine filter in the membrane box.
2. Physical cleaning: manual, mechanical or clean water tank cleaning. The common method is online backwash. Online flushing: backwash the film with water daily. The backwash pressure is greater than 0.1MPa. Backwash times are determined according to the requirements of the MBR membrane manufacturer. Backwash water is discharged from the membrane.
3. Chemical cleaning: Soak and clean the film with chemicals.
Online cleaning: In order to extend the cleaning cycle of the MBR film, it can be considered to add quantitative NaClO and HC1, and carry out online chemical backwashing at an interval of 3-6 days. Each backwash time should be 3-5 minutes. After the reagent is backwashed into the membrane, it should be left for 20-30 minutes before being put into normal water. Continuous aeration should be carried out during cleaning.
Offline cleaning: When the negative pressure exceeds 0.05Mpa, the MBR diaphragm should be cleaned offline in time. The cleaning method is to remove the MBR membrane from the membrane shelf, rinse the membrane surface with clean water, and remove the activated sludge attached to the membrane surface; Then they were immersed in quantitative NaCl solution and quantitative NaOH solution respectively to kill bacteria attached to the surface of the membrane and remove organic matter and colloidal substances attached to the surface of the membrane. Then rinse the membrane surface with clean water. After loading the membrane tank, backwash the membrane for 2-3 minutes to recover the MBR membrane flux.
The above is the specific content introduced to you by Shiheng Environmental Protection. I hope it helps you to have a deeper understanding of MBR membranes. If you want to know about the MBR cartridge or technology, you can visit the official website of Shiheng Environmental Protection, or you can communicate with our online customer service.
