FILTER MEDIA

BIRM MEDIA
 

Birm is an efficient and economical method of removing iron and manganese compounds from raw water supplies. It may be used in either gravity fed or pressurized water treatment systems. It acts as insoluble catalyst to enhance the reaction between dissolved oxygen (D.O.) and the iron compounds. In ground water dissolved iron is normally in the ferrous bicarbonate state due to the excess of free carbon dioxide and is not filterable. Birm acts as a catalyst between the oxygen and soluble iron compounds and enhances the oxidation reaction of Fe++ to Fe+++ and produces ferric hydroxide which precipitates and is easily filtered. Birm is easily cleaned by backwashing to remove the ferric hydroxide. It is not consumed in the iron removal process and therefore provides a positive economic advantage over many other iron removal medias. Other advantages of birm include long material life with relatively low attrition loss, a wide temperature performance range and extremely high removal efficiency. Under the proper water conditions, no chemicals are required for maintenance. Regeneration is not required. Birm is also used to achieve manganese reduction. When used to reduce manganese, the water to be treated should have a pH between 8.0-9.0 for best results. If both manganese and iron are to be removed, the treated water should have a pH below 8.5.

 

Advantages

  • Under the proper conditions, no chemicals to purchase for maintenance. Regeneration not required
  • Iron removal efficiency in extremely high.
  • Negligible labor cost: only periodic backwashing required.
  • Durable material with a long life and wide temperature range.

Physical Characteristics

  • Color: black
  • Bulk Density: 44 - 50 lbs./cu. ft.
  • Specific Gravity: 2.0
  • Effective Size: 0.59 mm
  • Uniformity Coefficienty: 1.96
  • Mesh Size: 9 x 35

Operational Specifications

  • Water pH range: 6.8 - 9.0
  • Bed depth: 30 – 36 in.
  • Freeboard: 50% of bed dept (min.)
  • Service flow rate: 3.5 – 5 gpm/sq. ft.
  • Backwash flow rate: 10 – 12 gpm/sq. ft.
  • Backwash expansion rate: 20 – 40% of bed
 
   
Granular Activate Carbon
Product Features
Granular activated carbon is designed for reduction of tastes, odors and dissolved organic chemicals from municipal and industrial water supplies. Manufacture from selected grades of coconut shell coal to produce a high density, durable granular product capable of withstanding the abrasion and dynamics associated with repeated hydraulic transport, backwashing and mechanical handling.

One of the most common applications for Coconut Shell-High Activated Carbon (RC-SAC) is the reduction of the undesirable tastes and odors present in many chlorinated water supplies. RC-SAC has been successful for many years in the reduction of free chlorine from water supplies. The end product is clean, fresh water with no objectionable taste or odor characteristics.

We have for many years provided activated carbon to the OEM and replacement market as a pre-treatment for other water purification systems as well as for use in individual treatment equipment for the removal of specific impurities.

RC-SAC may be used in either domestic or industrial applications using gravity flow or pressurized filter vessels.
Advantages

  • RC-SAC is an outstanding material for applications requiring taste, odor and dissolved organic chemical removal from water with suspended matter present. This product can be used for filtering waters having a wide range of pH levels.
  • Large surface area results in an exceptionally high capacity and efficiency.
  • Balanced pore structure gives a more efficient adsorption range.
  • RC-SAC is very durable so losses due to attrition are kept to a minimum.
  • RC-SAC has a very high carbon-low ash content.
  • Service rates of 5 gpm/sq. ft. are practical for ordinary taste, odor and chlorine loads.
  • RC-SAC will impart a high “polish” to the filtered water.   
 
Physical Properties 
MI 65 De Iron De Maganese Filter Media
Color

Black

Mesh Size 12 x 40
Bulk Density 28 lbs./cu. ft.
Effective Size 0.55-0.75 mm
Ash Content 2.5%
Iodine Number 20 – 42
Moisture as packed 3%
PH 30
 
Conditions for Operation
MI 65 De Iron De Maganese Filter Media
Water PH Range

5.8 – 8.6

Maximum Water Temp 45 degrees C
Bed Depth 600 mm (minimum)
Freeboard 40% of bed depth (minimum)
Regeneration No regeneration required
Service Flow Rate 1 – 30 QUOTE m3m2/ QUOTE m3m2 per hr
Backwash Flow Rate Between 25 – 80 QUOTE m3m2/ QUOTE m3m2 per hr
   
Ion Exchange Resin
 
Product Features     
Lewatit 80 is a high quality, high capacity strongly acidic, gel-type cation exchange resin of a uniform bead size with a styrene-divinylbenzene copolymer. Its high total capacity, very good chemical and mechanical stability make it especially suitable for use in softening of industrial water as well as all conventional ion exchange process.

Lewatit 80 resin is supplied in a sodium form as colored translucent beads in one cubic foot bags and larger bulk bags. The resin does not contain chlorinated solvents. and the manufacturing process ensures low taste, odor and color throw for potable water applications. The resin meets the requirements for paragraph 173.25 of the Food Additive Regulation of the U.S. Food and Drug Administration. When used in softening applications,Lewatit 80 resin has 30,000 grains of exchange capacity when regenerated with 15 pounds of NaCl per cubic foot and 20,000 grains with six pounds NaCl per cubic foot ensure high salt usage efficiency and low operating cost.
Advantages
  • No chlorinated solvents are used during manufacturing
  • Manufacturing process insures low taste, odor and color throw for portable waters
  • Strong and durable beads ensure long service life
     
Physical Properties    
n Exchange Resin Filter Media
Color

translucent amber

Bulk Density 52 lbs./cu. ft.
Specific Gravity 1.28
Effective Size .43 mm
Uniformity Coefficiency 2.0
Mesh Size 20 - 40
     
Conditions for Operation    
n Exchange Resin Filter Media
Bed depth

24 – 36 in.

Freeboard 30 – 40% of bed depth (min.)
Service flow rate 1 – 5 gpm/ cu. ft.
Backwash flow rate 13 – 15 gpm/sq. ft.
Backwash expansion rate 35% of bed depth
Service Flow Rate 1 – 30 QUOTE m3m2/ QUOTE m3m2 per hr
Backwash Flow Rate Between 25 – 80 QUOTE m3m2/ QUOTE m3m2 per hr
   
Multi-Sand Filter Media
 
     
Product Features     

Gravel is a natural ore that has many outstanding advantages over more common granular filter sands and multimedia used for suspended solids reduction. The angularity of the granules and the tapered internal pore spaces allow for reduction of dirt, silt and organic matter suspended in water by bridging, straining and adhesion. The rough surface and internal porosity provide a high surface area for efficient removal of suspended matter. Using deep bed filtration can typically reduce suspended solids down to the 5 micron or less range. Gravel granular structure typically creates less pressure loss through the filter and allows deeper sediment penetration into the bed for higher suspended solids loading and longer filter runs. The deep bed filtration capacity of this product prevents a rapid buildup of head loss and blinding problems that are associated with typical sand filters. Longer filter run times reduce backwash frequency, which provides conservation of water. This ideal combination of particle shape, texture and porosity make this media a good choice where quality water filtration and water conservation are important.

Substantial savings can be realized when designing a system using Gravel. Its low pressure drop, high service flow rates and high bed loadings combined with lower backwash frequency allow economy in equipment downsizing and reduced pumping requirements. Its low density also saves on handling expense and shipping cost.

     
Advantages ADVANT     
  • Gravel is graded specifically for water filtration plants.
  • Filter Sand can be used in municipal, industrial or residential applications
  • The spherical shape of uncrushed gravel promotes good flow and even distribution.
  • Deep bed filtration results in superior water quality and reduces the load on downstream equipment.
  • High sediment removal capacity results in longer filter runs, with a substantial savings in backwash water and time out of service.
  • High service flow rate result in lower equipment costs and a savings in space.
  • Reduced shipping cost due to lighter weight/cu.ft.
  • Replacement of multimedia in existing installations may increase filterReplacement of multimedia in existing installations may increase filter capacity.
  • Gravel is an all-natural, environmentally safety product.
     
     
SMALL / MEDIUM / GRAVELIAL PHYSICAL PROPERTIES
Natural Gravel For Water Filtration
Particle Size

3~5mm / 5~10mm / 10~20mm / 20~30mm

Bulk Density 1.45 g/c.c.
Mos Hardness 6.8
Ash ≦2 %
Moisture as packed ≦1 %
Packing 10 liter bags
     
     
SILICA SAND CONDITIONS FOR OPERATION
Natural Slica Sands For Water Filtration
SiO2

99%

Bulk Density 1.40g/CC
Burning Loss 0.14%
HCl solubility ≦ 3%
Turbidity 30
     

 

© Copyright 2013 Water Engineering Technologies