Membrane (bio)fouling process control
- How does it work?
- What can it be used for?
- What can it not be used for?
- Related Facilities
- Further Information
|Key words||Fouling, biofouling, permeability, membrane, process control, transmembrane pressure, permeate flux|
|Completed by||Wageningen UR - FBR|
How does it work?
|Primary objective||Process control to prolong filter- and lifetime of the used filter media|
|Working principle|| Membrane (bio)fouling occurs during all kinds of filtration processes. It can be (partly) removed by regularly applying different strategies like high-frequency back-pulsing, back-flushing or back-washing (three different methods where the flow is temporarily in the opposite direction). The aim is to prolong filtration time and life time of the used membranes. Based on online measurements, in combination with filtration models, the optimal time for back-pulsing and/or back-washing can be selected.|
|Additional effects|| Positive:
Reduction or even avoiding the use of chemical cleaning detergents
|Important process parameters||transmembrane pressure, frequency of backpulsing, frequency of backwashing, pore size of the filter medium|
|Important product parameters||viscosity, particle size distribution, turbidity, presence of gas bubbles (pressure sensitive)|
What can it be used for?
|Products||Beverages, liquid products|
|Solutions for short comings||Membrane technologies, Filtration technologies|
What can it NOT be used for?
|Other limitations||Availability of suitable sensors|
|Risks or hazards||Membrane can be harmed if applied pressure change is too large|
|Maturity||Available for laboratory scale, pilot scale and industrial scale|
|Modularity /Implementation||It can be inserted in an existing production line|
|Consumer aspects||No data available|
|Legal aspects||Please check local legislation.|
|Environmental aspects||No data available|
Facilities that might be interesting for you
|Institutes||Wageningen UR - FBR, University of Rome|
|Companies||Pentair X-Flow, C-Tech Innovation, Alctra, INRA, PSUTec SPRL|
|References|| 1. EU Café (Computer-Aided Food processes for control Engineering (Project No 212754) Start: Juni 2008
2. Qaisrani, T.M. et al., Impact of gas bubbling and backflushing on fouling control and membrane cleaning, Desalination, 266 (1-3), 154-161, 2011
3. Vollebregt, H.M. et al, Suspension flow modelling in particle migration and microfiltration , Soft Matter, 6 (24), 6052-6064, 2010.
transmembrane pressure, frequency of backpulsing, frequency of backwashing, pore size of the filter medium viscosity, particle size distribution, turbidity, presence of gas bubbles (pressure sensitive) Membrane equipment 2.2.1 not applicable separation, other ICT www.webofknowledge. com (keywords: (bio)fouling, permeability, membrane, process control, transmembrane pressure, permeate flux) WikiSysop :Template:Review document :Template:Review status