Filters Medias

 

blog7How does one select the appropriate filtration system? First, review all raw water quality data to establish the requirements for the alternatives. Once the potential alternatives are selected, determine the necessity of pilot or bench-scale tests. If the desired performance of one or more of the alternatives is in doubt, testing is appropriate. (Testing is always useful if time and budget allow). Otherwise, literature surveys, bench-scale studies, or pilot-test results can be used to derive each alternative’s performance characteristics and design considerations. Following this initial selection, the basic process concerns for the various alternatives should be identified and evaluated, including:

  • turbidity removal performance,
  • Giardia removal performance,
  • color removal performance,
  • cleaning cycle frequency,
  • necessary chemicals/chemical dosages,
  • applicable regulatory standards,
  • required operational skills,
  • Necessary sludge management.

 

Disinfection Methods

 

Sediment Cartridges – Spun Poly
Sediment Cartridges – Rope Wound
Membranes
Code Description

blog7 An excellent ‘depth’ cartridge with high efficiency that has optimum dirt-holding capacity, providing exceptional value for domestic and light industrial applications. This cartridge will capture particles throughout the whole depth. FDA compliant polypropylene cartridges for food and beverage applications to meet government standards. Available in standard and BB widths, with 10”, 20”, 30” and 40” lengths to fit existing housings and compatible with most other brand housings. Suitable for use with reverse osmosis.

Reduces: Sediment
  • Rust
  • Dirt
  • Hair
  • Scale
  • Suspended matter
  • Suitable for tank water and bore water

blog7A robust ‘depth’ cartridge that has optimum dirt holding capacity, resulting in fewer change-outs. Made from polypropylene rope wound around a central core. Rope wound cartridges have exceptionally high structural strength, allowing them to withstand severe operating conditions. Designed to allow gradual pressure build-up to eliminate abrupt cut off when fully loaded. FDA compliant polypropylene cartridges for food and beverage applications to meet government standards. Available in standard and BB widths, with 10” and 20” lengths to fit existing IBC Water housings and compatible with most standard housings.

Reduces:
  • Sediment
  • Rust
  • Scale
  • Hair
  • Suspended matter
  • Suspended matter
  • Suitable for tank water and bore water

blog7Reverse osmosis (RO) membranes are used to purify varying qualities of water. In a common application, the appropriate RO membrane element is housed inside a pressure vessel that accepts inflowing, pressurised feed water.
Cross flow filtration across the membrane then divides the flow into two outflow streams: the purified permeate stream and the concentrate or reject stream. Unlike conventional filtration which can be maintenance-intensive, costly, and environmentally unfriendly, membrane-separation technology employs cross flow filtration where captured impurities on the membrane are constantly swept away by the concentrate stream. Thus the membrane surface is continuously cleaned, prolonging the life of the membrane and reducing maintenance costs.
Reverse osmosis (RO) membranes are used to purify varying qualities of water. In a common application, the appropriate RO membrane element is housed inside a pressure vessel that accepts inflowing, pressurised feed water. Cross flow filtration across the membrane then divides the flow into two outflow streams: the purified permeate stream and the concentrate or reject stream. Unlike conventional filtration which can be maintenance-intensive, costly, and environmentally unfriendly, membrane-separation technology employs cross flow filtration were captured impurities on the membrane are constantly swept away by the concentrate stream. Thus the membrane surface is continuously cleaned, prolonging the life of the membrane and reducing maintenance costs.

Strong cation resin, for water softeners. Hard water passes over the resin, attracting the minerals (calcium etc). Brine is used to regenerate the resin. 25 litre bag or per litre.
Coconut shell activated carbon. Ideal for chlorine, tannin and organic colour reduction due to its exceptional surface area and adsorption capacity. Suitable for drinking water applications. 25kg bag or per kilo.
Activated carbon. Ideal for chlorine, tannin and organic colour reduction due to its exceptional surface area and adsorption capacity. 25kg bag or per kilo.
BIRM Backwashing Iron Removal Media reduces dissolved iron using air. Easily cleaned by backwashing to remove the precipitant. 22kg bag or per kilo.
DMI: removes iron and manganese via an oxidizing process using sodium hypochlorite as the oxidation agent. 20kg bag or per kilo.
Manganese greensand. Reduces iron, manganese and hydrogen sulphide through oxidation and filtration. 40kg bag or per kilo.
Calgrit or Calcite, is primarily calcium carbonate, an alkali used in a neutralising filter for pH correction in acidic water. 20kg bag or per kilo, 4mm diameter. Next Sand is a high purity and high flow single media with 3-5 micron removal. 22kg bags or per kilo.
Zeolite media suitable for filtration of suspended solids down to 5 micron. 15kg bag or per kilo.
Anthracite or filter coal. Used as final bed (no. 6) on multimedia filters due to its fine mesh size. 25kg bag or per kilo.
Sand, nominal size 0.4 – 1.1mm, bed no. 5 in multi-media filters. 20kg bag or per kilo.
Garnet fine 30/60 mesh. Bed no. 4 in multi-media filter. 25kg bag or per kilo.
Garnet heavy 3mm. Bed no. 3 in multi-media filter. 25kg bag or per kilo.
Gravel, nominal size 1.5 – 3mm underbed gravel. 20kg bag or per kilo.
Gravel, nominal size 3-6mm underbed gravel. 20kg bag or per kilo.
Gravel, nominal size 6-12mm underbed gravel. 20kg bag or per kilo.
Mixed bed resin. Polishes process water to demineralised water quality. Strong acid cation exchange and strong base anion exchange resin. 50 litre drum or per litre.

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