What are the Common issues of Ultra-Filtration?
Ultrafiltration is a minute and an improved filtration process that is used in drinking water and tertiary wastewater reuse applications. It is a pressure-driven membrane separation technology. Its semipermeable membrane can filter out particles as small as 0.01 microns, such as silt and viruses. Membrane filtering technologies, on the other hand, will have issues if they are not properly pre-treated, operated, and maintained.
Common Issues in Ultra filtration
1. Increased Permeate Contamination
This is a rare occurrence for well-maintained and monitored systems. To recap, permeate is water that has been purified from polluting solids. Users receive pure water as a result of the filtration procedure. As a result, if you see that the quality of your permeate water is deteriorating, it's obviously a problem. Either there are bigger particulates or germs contaminating the water that should have been trapped by the membrane.
A compromised membrane is frequently the cause of a decline in removal efficiency. Over time, polymeric membranes might become worn out. High temperatures or pH levels can quickly deteriorate them, and abrasive particles can damage the membrane's inner pores if not properly pre-treated. To say the obvious, membranes that are full of extra holes do not perform well (other than their pores of course). Now the system isn't performing as expected, therefore you'll have to remove the membrane and recirculate the polluted permeate.
2. Membrane Fouling
Membrane fouling is a problem with UF filtering, as it is with any other membrane separation process, including reverse osmosis. Fouling is the adhesion of particulate particles to the surface of a membrane in basic terms.
Fouling has its own cause and effect that vary slightly. Some membrane foulants are reversible, while others are permanent.
- Solids: Suspended solids and colloidal particles gather on the ultrafiltration membrane's surface and within its pores, preventing water from passing through. Fouling is more likely in applications with high turbidity and suspended particles that do not receive adequate pre-treatment.
- Scaling: Membrane scaling is similar to the scaling that occurs in pipes carrying water with high quantities of hardness compounds. When the concentration of these dissolved minerals rises above the solvent solution's saturation limit, they begin to precipitate out of solution onto the membrane's surface. These minerals have a tendency to crystallise, making them nearly impossible to remove without the use of a chemical cleaner or anti-scalant. Scaling on the membranes of UF filter systems can be caused by two minerals: calcium and magnesium.
- Microbiological: Algae and bacteria are common biological pollutants found in surface water sources. These pollutants will attach themselves to the bottom of a membrane and multiply in a warm environment with low flow rates. They can build up a coating that prevents water from passing through the membrane, causing the Trans membrane pressure differential to rise. The pumps will be put under additional strain as a result of the higher-pressure differential, which will increase the amount of energy they draw.
3. Waste Stream Disposal
This has something to do with the UF filter concentrate discharge. Now for example, the filtration system performed as expected, and you now have clean water that you may safely release into an outdoor stream without incurring any environmental charges.
Unfortunately, focused stream did not vanish into thin air, never to be seen again. Nope.
Whether it's clinging to the membrane or sitting in a concentrate waste tank, it's still there, and something must be done about it.
The issue is that you can't just throw it out of the window and forget about it. Whatever was in the feed water has been concentrated in this reject wastewater. As a result, while it may be permissible to dump into the environment in some situations, if it contains dangerous contaminants, the facility could face a substantial fine.
Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at email@example.com for any support, inquiry or product-purchase related query.