Ultrafiltration (UF), however, does not suffer from those limitations. This technology uses a membrane barrier to exclude particles as small as 0.01 microns, including bacteria, viruses and colloids, meeting increasingly stringent water quality standards around the world providing a stable, reliable and consistent water quality.
- High and consistent product quality measured by turbidity (NTU), silt density index (SDI) or log removal value (LRV).
- Tolerance to feed water quality upsets.
- No use of pretreatment chemicals (polymer, coagulant, pH adjustment) and associated costs for sludge disposal.
- Small footprint and less weight than media filters.
When used as a pre-treatment for reverse osmosis (RO), UF also helps reduce fouling of RO membranes, which can lead to:
- Reduced chemical cleaning frequency and consequently, lower operating costs and downtime.
- The potential to operate RO at higher flux, with fewer membranes and vessels – leading to lower capital cost for the RO system.