This outstanding combination between the superior properties of R-SiC and the ultra-compact honeycomb geometry results in:
- Improved permeate fluxes at reduced pressures for lower energy consumption,
- Fast and low water consumption backwash operations.
Innovative, Superior Dead-End Filtration
Crystar® FT dead-end membranes are high functionality products engineered with alternately plugged channels defining flow paths for the feed and permeate streams. The filtration membranes have external dimensions of only 149 x 149 x 1000 mm, providing 16m2 of filtration area thanks to their internal honeycomb geometry. This compactness cannot be overstated.
As shown by the inset schematic drawing, liquid enters axially at the inlet extremity by the open channels. The inlet channels are plugged at the other end, forcing the liquid to flow across the membrane coated onto the porous honeycomb walls. After flowing through the membrane, the filtered liquid exits the monolith axially by the outlet channels. The low thickness (0.9 mm) and high porosity (40%) of the walls offer low resistance to fluid flow, leading to very efficient honeycomb liquid filtration and backwashing.
To summarise, Crystar® FT dead-end membranes provide:
- High filtration flow rates thanks to high permeate fluxes, typically 300 – 1000 LMH,
- Low energy operation, thanks to filtration pressures below 1 bar,
- Compact installations,
- High water recovery or productivity thanks to the low water consumption of 15 - 80 liters per filtration membrane per backwash,
- A robust and durable filtration medium thanks to the outstanding properties of recrystallized silicon carbide.
These ceramic honeycombs can be installed in individual or multi-element housings that connect them to the filtration system. The membranes can be supplied either with a PVC shoe for integration in customized housings or already mounted in a FRP (glass fiber reinforced polymer) module.
Crystar® Deadend membranes:
Crystar® HiFlo and HiFlo A+ are silicon carbide membranes with a 4 µm pore size. They provides an excellent trade-off between productivity and permeate quality. They can replace traditional technologies such as sand, bag and cartridge filters with significant benefits in term of compactness, filtrate quality, maintenance and OPEX.
Crystar® HiPur and HiPur A+ are a silicon carbide membranes with a 0.25 µm pore size. The tight and well controlled pore size distribution offers the best solution to reach uncompromising filtrate qualities, most of the time equivalent to those provided by 50 – 100 nm ultrafiltration membranes.
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