Environment Water and WastewaterWater Membrane
This following data was acquired at a European pilot site with feedwater iron levels of 0.5 to 1.0 mg/L and turbidity ranging from 8 to 12 NTU. A ceramic monolith module with a nominal pore size of 100 nm consistently produced permeate quality < 0.01 mg/L iron and turbidity of < 0.1 NTU. A stable filtration flux of 400 lmh (236 GFD) was observed with a 98% recovery rate. The expected comparable filtration flux for most polymeric hollow fiber membranes operated under the same conditions is ~ 85 lmh (50 GFD). Under these conditions, Nanostone’s ceramic membrane demonstrated an apparent flux advantage 4.7 times that of polymerics. For more in-depth updates of our pilot site progress, please subscribe to our Newsletter.
Ceramic MF/UF membranes have been applied in industrial fluid and water treatment applications since the early 1990’s. These early membranes were produced in tubular and flat sheet configurations with significantly lower surface area compared to polymeric membranes. The high cost of these membranes have limited their application to the most challenging applications where polymeric membranes are known to fail. In recent years, high surface area ceramic membranes have become available, but at 4-5 times the cost of polymer membranes.
Nanostone Water is currently conducting global pilot studies of high surface area MF/UF ceramic monolith membranes expected to provide the well-recognized benefits of ceramics at a cost comparable to polymerics.