UF can be used to replace existing secondary and tertiary filtration systems used in water treatment plants. When treating water with high suspended solids, it can be integrated into processes by using primary and some secondary treatments as pre-treatment stages.
Ultrafiltration provides several advantages over traditional water treatment methods:
- With the exception of cleaning, no chemicals are required
- It produces constant product quality regardless of the feed water quality
- UF is capable of exceeding the regulatory standards of water quality. It can achieve between 90 and 100% pathogen removal.
- It can be used for pre-filtration in reverse osmosis plants to protect the reverse osmosis membranes.
A disadvantage is that high costs can be incurred due to membrane fouling and replacement requirements.
Similarly to other membrane separation processes used in filtration applications for water treatment, Veolia’s ultrafiltration technology is used for:
- Seawater desalination
- Process and potable water production
- Boiler feedwater and pharmaceutical water polishing and demineralisation
- Process and municipal effluent rehabilitation and recycling
- As part of an integrated zero liquid discharge process
UFLEX™, Veolia’s skid-mounted ultrafiltration system is used in industrial process water, water recycling and water for reuse to remove suspended solids, log4 viruses and most bacteria.
OPAMEM ULTRA, also skid-mounted compact ultrafiltration systems, is used for drinking water treatment and water reuse.
The chemicals that Veolia uses and distributes for use with its microfiltration membranes – and other membranes – fall in the Hydrex™ 4000 series. This series has been especially developed for ultrafiltration plants, as well as reverse osmosis and nanofiltration
Veolia South Africa Ultrafiltration Case Studies
ImproChem, Chevron Refinery, Cape Town
Situated in Milnerton in the Western Cape, this project involved the design, construction and commissioning of an ultrafiltration plant and reverse osmosis desalination plant as part of a petrochemical water treatment project. Ultrafiltration is one of the processes used to treat water drawn from a nearby wastewater treatment plant. Read the full case study here.
Angola Containerised treatment plant
Veolia designed, constructed and commissioned a 20 m3/hour containerised potable water treatment plant using several key technologies, ultrafiltration and reverse osmosis among them.
Eskom Tutuka Power Station, Mpumalanga
Veolia designed, constructed and commissioned a power plant water treatment system at Eskom’s Tutuka Power Station in Mpumalanga to reduce the amount of brine water produced at the power station to 0.6 mega litres a day. Ultrafiltration is one of the 6 Veolia technologies used in this plant. Read the full case study here.