Constituents and Influencing Factors of MBR Flat Sheet Membrane Pollution

Composition of MBR flat sheet membrane pollution

With the gradual expansion of modern industry, the amount of water used and wastewater generated in cities continues to increase. This phenomenon will cause water resources to become increasingly scarce, and traditional methods can no longer solve this situation.

MBR flat sheet membrane is a product driven by this environmental demand, with excellent water quality, high treatment efficiency, small land occupation, and simple operation.

• The cake layer mainly consists of activated sludge and colloidal substances, which will be intercepted when water passes through the MBR flat sheet membrane.

  
  

  Before it is sent away, it accumulates on the surface of the membrane under the action of the filter pressure difference and the permeate flow, which causes membrane fouling.

  
  

• The source of dissolved organic matter is mainly the metabolic products of microorganisms, which can form a gel layer on the outer surface of the MBR flat sheet membrane or adsorb on the outer surface of the micropores in the membrane, thereby blocking the pores and reducing the membrane flux.

  
  

• Microorganisms contaminate the surface of the MBR flat sheet membrane, and the micropores in the membrane contain nutrients necessary for the growth of microorganisms, so it is inevitable that many microorganisms will breed.

Important factors affecting MBR flat sheet membrane pollution

• Characteristics of the membrane itself, such as membrane pore size and dispersion, membrane material, membrane structure, interaction between membrane-solute-solvent, etc.;

• The quality of treated wastewater, especially the type and concentration of organic matter in water;

• Operating conditions such as sludge age, dissolved oxygen concentration, MBR flat sheet membrane surface flow rate, temperature, etc.;

• MBR flat sheet membrane characteristics such as scale, height, and aeration system layout;

• Other factors such as the interaction between microbial populations, the effect of the membrane itself on biofilm growth, and the composition and concentration of bacterial extracellular polymeric substances (EPS).

Application scope of MBR flat sheet membrane

• Upgrading existing urban wastewater treatment plants, especially considering the difficulty of meeting wastewater treatment standards or rapidly increasing processing capacity, and the inability to expand the area.

• Used to treat high-concentration, toxic, and difficult-to-degrade industrial wastewater. For example, high-concentration organic wastewater is a common source of pollution, with high emissions of organic wastewater such as papermaking, sugar, alcohol, leather, and fatty acids every year.

  
  

  Although the conventional activated sludge method can be used to treat this type of wastewater, the quality of wastewater has some effect, but it is difficult to meet the requirements of discharge specifications.

  
  

  However, the advantages of MBR flat sheet membrane technology determine that MBR flat sheet membrane can effectively treat wastewater that is difficult to treat by traditional methods and can be reused repeatedly.

• Suitable for the treatment and reuse of landfill leachate.

  
  

• Used in hospital sewage treatment. Hospital wastewater is known to contain hazardous chemicals, pathogens, and pharmaceutical residues that can pose significant threats to public health and the environment. However, MBR flat sheet membrane technology offers a highly efficient and reliable treatment solution that can meet the stringent discharge standards required in this sector.

• Used in areas and places where wastewater needs to be reused, such as car washing industry, hotels, mobile toilets, etc., fully utilizing the characteristics of membrane bioreactor, small land occupation, compact equipment, automatic control, and high sensitivity.

• MBR flat sheet membrane is suitable for areas without drainage network systems, such as small residential areas, holiday resorts, tourist attractions, etc.

• Used for small-scale sewage water treatment plants, determined by the MBR membrane price.

• Suitable for eliminating trace contaminants in drinking water history in existing water treatment plants.