mbr membrane bioreactor disadvantages

mbr membrane bioreactor disadvantages:

1, membrane cost is high. Make the membrane - bioreactor infrastructure investment is higher than the traditional sewage treatment process.

2, membrane contamination is easy to appear, bringing inconvenience to the operation and management.

3, high energy consumption. First of all, MBR mud-water separation process must maintain a certain membrane driving pressure, followed by MBR pool MLSS concentration is very high, to maintain sufficient oxygen transfer rate, must increase the intensity of aeration, and in order to increase the membrane flux, to reduce membrane contamination, must increase the flow rate, scouring the membrane surface, resulting in the energy consumption of the MBR is higher than the traditional biological treatment process.

4, many factors. Due to the increase in membrane flux, membrane life extension will significantly reduce the operating costs of MBR, therefore, under the premise of ensuring water quality, membrane flux should be as large as possible, so as to reduce the use of membrane area, reduce infrastructure costs and operating costs. Therefore, controlling membrane pollution and maintaining high membrane flux is an important part of MBR research. The membrane flux is closely related to membrane materials, operation mode, hydraulic conditions and other factors.