Views: 12 Author: Site Editor Publish Time: 2018-10-23 Origin: Site
Environmental disclosure - misguided flat membrane in the MBR industry
(1) Many people always think hollow membrane is cheap, but the flat membrane is expensive. However, they do not know the investment of hollow membrane system is more expensive than the flat membrane system.
A. Unit price - the price of non-brand hollow membrane is half of flat membrane.
B. The amount of membrane for the unit water design - the amount of hollow membrane is 1.3 1.4 times than the flat membrane.
C. The use of hollow membranes requires separate design of membrane pools. (Aerobic and membrane pools are separated), while the flat membrane pools are aerobic (aerobic and membrane pools are combined). The investment of membrane tank is much larger than that of flat film and hollow film.
D. The use of hollow membranes requires a backwashing system. Correspondingly it increases the investment in equipment and pipes related to dosing devices, pumps and control systems.
(2) This is why the flat membrane is used for integration equipment. Therefore, the owners need flat membrane, while the engineering companies need hollow membrane.