FILTRATION SYSTEM
FLAX Multimedia Filter
Flax Multimedia filters deliver superior water quality along with significant operational savings.
The ability to remove particles, odors, color, iron, arsenic, etc provides the clearest, cleanest and safest environment.
HUI filter is available as either a standalone package unit or a modular concrete design. The package units are constructed of either 304 SST or FRP. Internal components for both package and concrete units are built with stainless steel and / or FRP. Filters are available in 40” standard bed or 80” deep-bed design depending on the nature of the application.
BENEFIT
- Compact Footprint
- Energy Efficient
- Easy Maintenance and Operation
Our filter installation can be designed for any size area allowing the technology to adapt to any size water or wastewater treatment plant.
FLAX Multimedia Filter Option
Sand Filter
Activated Carbon Filter
Iron Removal Filter
Demineralization Filter
Demineralization Filter
Why should desalinated water be remineralized? Because there are few adverse effects on low mineralized water:
- High corrosion potential
- Dietary deficiency causing risks of ischaemic heart and cerebrovascular disease (WHO, 2005a; WHO, 2006; Cotruvo, 2006)
World Health Organization (WHO) recommends 10 mg/L of Magnesium and 30 mg/L of Calcium for drinking water.
Two solutions are widely used to remineralize or neutralize water:
| No. | Description | Mineral |
| 1 | CO2 addition + Calcite Limestone (CaCO3, MgO) percolation + Na2CO3 | 80 mg/L CaCO3 |
| pH 7-7.5 | ||
| 2 | Addition of CaCl2 + NaHCO3 | 100 mg/L CaCO3 |
| 100 mg/L Na + 50 mg/L Cl | ||
| pH 7-7.5 |
Two solutions are widely used to remineralize or neutralize water:
| Description | Mineral |
| CO2 addition + Calcite Limestone (CaCO3, MgO) percolation + Na2CO3 | 80 mg/L CaCO3 |
| pH 7-7.5 | |
| Addition of CaCl2 + NaHCO3 | 100 mg/L CaCO3 |
| 100 mg/L Na + 50 mg/L Cl | |
| pH 7-7.5 |
SPECIFICATION TABLE
| Filtration Velocity | 8 – 30 m3/h.m2 |
| Diameter | 50 cm to 1 m and 1 cm to 3 m |
| Filtration Area | 0.2 to 0.8 m2 and 0.8 to 7 m2 |
| Flowrate | 10 L/h to 25 m3/h and 6 to 200 m3/h |
| Pressure Rating | 4 to 10 bar |
| Vessel Material | Epoxy-Coated Steel, Polyester Composite and Stainless Steel (on request) |
| Bed Depth | Minimum 1 m |
| Filtration Media | Calcite (CaCO3 99%) |
| Top Manhole | 2.5” to 6″ and DN 400 |
| Accessories | 5-ball or butterfly valves and 5-butterfly valves |
| Option | Manometer, Degaser and Flowmeter |
| Control | Automatic or manual backwash, on timer and / or differential pressure |
Iron Removal Filter
Plant Principle: firstly, air is injected in order to oxidize the iron. The oxidized iron will then precipitate on a sand filter. An MnO2 layer in the sand bed will catalyze the oxidation of residual iron. Backwash will be done by water and by air. More on iron removal principles.
Filtration media choices are:
- Sand + MnO2 for high iron concentrations
- Calcite for acidic waters
- Birm
- Greensand
Other oxidation chemicals can be used for highly contaminated waters:
- Ozone
- Chlorine
- Chlorine Dioxide
These chemicals also have a biocide effect but might interact with other component.
Activated Carbon Filter
Activated carbon filters are generally used in the process of removing organic compounds and / or extracting free chlorine from water, thereby making the water suitable for discharge or use in manufacturing processes. Eliminating organics in portable water such as humic and fulvic acid, prevents chlorine in the water from chemically reacting with the acids and forming trihalomethanes, a class of known carcinogens.
SPECIFICATION TABLE
| Filtration Velocity | 2 – 8 m3/h.m2 |
| Contact Time | 10 – 30 minutes |
| Diameter | 50 cm to 3 m |
| Filtration Area | 0.2 to 7 m2 |
| Flowrate | 10 L/h to 100 m3/h |
| Pressure Rating | 4 to 10 bar |
| Vessel Material | Epoxy-Coated Steel, Polyester Composite or Stainless Steel (on request) |
| Bed Depth | Min. 1 m |
| Filtration Media | GAC, Pesticide Removal , COD Removal and Dechlorination |
| Top Manhole | 2.5″ to 6″ and DN 400 |
| Accessories | 5-ball or butterfly valves and 5-butterfly valves |
| Option | Manometer, Degaser and Flowmeter |
| Control | Automatic or manual backwash, on timer and / or differential pressure |
Sand Filter
Sand filtration is used for the removal of suspended matter as well as floating and sinkable particles. The wastewater flows vertically through a fine bed of sand and / or gravel. Particles are removed by way of absorption or physical encapsulation. If there is excessive pressure loss on the filter, it must be rinsed.
SPECIFICATION TABLE
| Filtration Velocity | 6 – 15 m3/h.m2 |
| Diameter | 50 cm to 1 m and 1 to 3 m |
| Filtration Area | 0.2 to 0.8 m2 and 0.8 to 7 m2 |
| Flowrate | 10 L/h to 10 m3/h and 10 to 100 m3/h |
| Pressure Rating | 4 to 10 bar |
| Vessel Material | Epoxy-Coated Steel, Polyester Composite or Stainless Steel (on request) |
| Bed Depth | Min. 1 m |
| Filtration Media | Anthracite: 1.4 – 1.5 mm |
| Sand: 0.4 – 0.8 mm | |
| Sand: 1.0 – 2.0 mm | |
| Gravel: 2.0 – 3.15 mm | |
| Gravel: 3.15 – 5.6 mm | |
| Top Manhole | 2.5″ to 6″ and DN 400 |
| Accessories | 5-ball or butterfly valves and 5-butterfly valves |
| Option | Manometer, Degaser or Flowmeter |
| Control | Automatic or manual backwash, on timer and / or differential pressure |