Mbr membrane can be made from various raw materials, including chromatograph, solid phase and even liquid phase. The applied membrane separation is solid phase membrane. According to different diameters, it can be divided into: microfiltration membrane, Dow reverse osmosis membrane, nanofiltration membrane and ro reverse osmosis membrane; According to the raw materials, it can be divided into inorganic membrane and organic membrane. The inorganic membrane is mainly a fine hierarchical membrane. The membrane can be concentration polarized or charge balanced. The membranes to be solved are mainly solid phase non conditional membranes made of organic chemical composite materials.
Classification basis and classification of membrane:
Mbr membrane classification - membrane materials
Inorganic membrane: a kind of solid membrane. It is a semi permeable membrane made of inorganic materials, such as metal materials, hydroxides, porcelain, porous laminated glass, activated carbon, inorganic fiber materials, etc.
stay MBR membrane The inorganic membrane used in is mostly microfiltration. Its advantages are that it can be applied when pH=0~14. Working pressure P<10MPa. Temperature<350 ℃, its diffusion coefficient is high, the relativity of energy consumption is low, and it has great competitiveness in solving chemical wastewater with high concentration; The defects are that the project cost is expensive, the alkali resistance is not good, the ductility is small, and the production of the membrane is difficult.
2. High molecular material Organic membrane raw materials: isoprene rubber, high pressure polyethylene, polythiophene, polysulfone, alicyclic polyamide, fluoropolymer, etc.
The cost of organic membrane is relatively low, the project cost is cost-effective, the production and processing technology of membrane is relatively complete, the membrane diameter and method are also relatively diverse, and the application is common, but the whole operation process is prone to environmental pollution, low compressive strength, and short application cycle.
Mbr membrane classification - membrane components
In order to better facilitate industrial production and installation, improve the working efficiency of the membrane, and achieve a larger total membrane area within the standard volume, the membrane is generally assembled in a basically modular machine equipment in a certain way, and the components in the solution are separated under a certain power. This type of equipment is called a membrane component (Module).
Mbr membrane classification - membrane diameter
Membranes selected for MBR process are generally microfiltration membrane (MF) and Dow reverse osmosis membrane (UF), most of which are 0.1~0.4 μ M membrane diameter, which is already sufficient for the membrane tube reactor of solid-liquid separation equipment type.
Common polymer raw materials of microfiltration membrane include polycarbonate, cellulose ester, polyvinylidene fluoride butadiene, polysulfone, polytetrafluoroethylene, polyethylene, methacrylate imide, polypropylene, polyetheretherketone, polyamide, etc.
ultrafiltration membrane Common polymer raw materials include polysulfone, polyether sulfone (PES), polyamide, polythiophene (PAN), polyfluoroethylene, cellulose ester, polyether ether ketone, polyfluorobenzene, methacrylate fluorobenzene, etc.
