Ultrafiltration for Raw Water Pre-treatment
Consolidated Water Conditioning has developed a range of compact, easy-to-use ultrafiltration (UF) systems for the pre-treatment of water supplies high in suspended solids and turbidity. Our UF systems are ideal for use at game lodges, farms and other installations where river or dam water is used to provide water for drinking, laundry and general hospitality uses.
What is Ultrafiltration?
Ultrafiltration is a membrane filtration process similar to Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane. The pore size of the ultrafiltration membrane is usually 103 – 106 Daltons. Common applications for ultrafiltration systems are food & beverage processing, pharmaceutical use, municipal , borehole and surface water treatment.
How Ultrafiltration Works
In filter mode, feed water flows inside the ultrafiltration membrane fibre, in either a cross-flow or dead-end filtration configuration, depending on the feed water quality. Filtrate is collected into the central core tube and passes out to process.
In backwash mode, filtrate backwash flows from the central core tube to inside the fibre tubes and out to drain. In most systems, the backwashing cycle is controlled by a timer or differential pressure switch.
In applications where complex contaminants are present in the feed water, or additional treatment is required, chemicals may be used during the backwashing process. Usually, sodium hypochlorite and hydrogen peroxide are used to help flush the membrane surface of impurities.
- Low fouling hydrophilic polyethersulphone membrane
- Durable fibre structure, robust module design with lightweight and compact construction.
- Timer controlled backwash.
- Resistant to chlorine, peroxide and wide range of pH levels.
- Modular design for easy system expansion.
- Pressure clarifier.
- Flocculant dosing system.
- Feed, backwash and flushing pumps.
Ultrafiltration Pre-Treatment Systems vs. Conventional Pre-Treatment
- Significantly better filtrate quality as compared to conventional pre-treatment, exhibiting 100% removal of colloidal material greater than 0.1 micron.
- Product quality is stable, even during feed water quality variations.
- Single-step treatment reduces operating costs and increases efficiency.
- Dramatically reduces use of pre-treatment chemicals.
- Low pressure feed and backwash operation.
- Increased efficiency of Reverse Osmosis system design and operation, contributing to reduced capital and operational costs.
|Model||Maximum flow rate (m³/hr)||Minimum feed pressure||Number of modules||Maximum feed water Turbidity|
|UF-M01||1.5||250 kPa||1||15 NTU|
|UF-M02||3.0||250 kPa||2||15 NTU|
|UF-M03||4.5||250 kPa||3||15 NTU|
|UF-M04||6.0||250 kPa||4||15 NTU|
pH range: 2 – 13
Instantaneous chlorine tolerance: 100 mg/l
Maximum operating temperature: 40°C
Maximum feed pressure: 500 kPa.
In order to accurately size an ultrafiltration system for your residential, commercial or industrial application, we will need to know the following:
- The amount of water you expect to use per 24-hour period.
- Your peak water demand.
- Operating hours per day.
- Your water pressure.
- The suspended solids content and turbidity of your water.
- What you plan to use the treated water for.
Your local approved CWC distributor can help you calculate your treated water needs, and can arrange for a professional water analysis to be taken. For more information about multimedia sand filters and how the CWC filtration process can help you in your home or business, contact CWC today.