What are the normal operating environments required for MBR membranes?
The normal operating environment of MBR membrane needs to consider the following aspects:
1. Temperature: The operating temperature of MBR membranes should usually be within a certain range to ensure the performance and stability of the membrane. Generally speaking, a temperature between 20-30 degrees Celsius is more suitable. Excessive or insufficient temperature can affect the performance and service life of the membrane.
2. pH value: MBR membranes also have certain requirements for pH value. Usually, the pH value should be maintained between 6-9 to avoid damage to the membrane material. An environment that is too acidic or too alkaline can lead to a decrease in membrane performance or damage.
3. Dissolved oxygen: In the MBR process, sufficient dissolved oxygen is necessary to ensure the normal metabolism and activity of microorganisms. Therefore, it is necessary to maintain a certain dissolved oxygen concentration, usually above 2mg/L.
4. Water quality: The water quality entering the MBR system should meet certain requirements, including suspended solids, COD, BOD, ammonia nitrogen and other indicators that should be within a certain range. At the same time, water containing a large amount of harmful substances such as oil and heavy metals should be avoided from entering the system to protect the service life and treatment effect of the membrane.
5. Regular maintenance and cleaning: MBR membranes need to be regularly maintained and cleaned during use to remove dirt and deposits on the membrane surface and maintain membrane permeability. This includes physical cleaning (such as rinsing, backwashing, etc.) and chemical cleaning (such as soaking with cleaning agents, etc.).
6. Prevention of membrane fouling: To prevent membrane fouling, a series of measures can be taken, such as pre-treatment of raw water to remove large particulate matter and harmful substances, regular discharge of sludge to maintain the activity of the bioreactor, etc.
In summary, the normal operating environment of MBR membranes requires consideration of factors such as temperature, pH value, dissolved oxygen, water quality, regular maintenance and cleaning, and prevention of membrane fouling. By reasonably controlling these conditions, the stable operation and efficient treatment effect of the MBR membrane system can be ensured.