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Activated Carbon

Activated carbon is used for the removal of dissolved components from, freshwater waste water and marine systems. Activated carbon is effective against the following;

  • organics, e.g. proteins
  • colour e.g. humic acids
  • antibiotics
  • hormones
  • chlorine & bromine
  • malachite green & many dyes
  • ozone

Sizing a carbon filter

The size of an activated carbon filter depends on the waste water to be treated,  generally speaking the slower the water flowrate the more effective the processes. As a guide the optimum flowrate is 4 BV/hr ,  this flowrate relates to the residence time of the water in the activated carbon filter.  For example if there was a bed volume of 1 cubic meter of activated carbon,  the optimum flowrate would be 4 cubic metres of water per hour.  This is a slow flowrate and relates to the use of carbon in the removal of dissolved Organics such as humic acids from water.  Some chemicals are much easier to remove,  such as ozone or chlorine.  In these cases water flowrates up to 20 BV/hr may be acceptable.

The flowrate also relates to the performance and life of the activated carbon,  again if the water flowrate is high, utilization of the bed will not be as good.  Under these conditions it is always best to use two filters in series.   The quality of the water is monitored between the filters.  When break-through is measured after the first filter,  this filter is taken out of line, the carbon is replaced, and the filter placed back in line at position 2 after the what was previously the second filter.  This arrangement maximizes the utilization of the the carbon.

Pressure sand filters are ideal containers for the activated carbon, details of which are included on this web site.

Activated carbon Specification

AQUA  DRYCARB

WATER TREATMENT CARBON

Aqua DryCarb is a high activity carbon for use in various water treatment applications. It is manufactured from specific grades of bituminous coal to produce a high quality carbon that can meet the demands of continuous fixed bed water treatment. AQUACARBTM 207EA is a proven product used by a variety of customers which includes Water Companies, Sewage Treatment Works, Soft Drink Manufacturers, Brewers and in Industrial Water Treatment.

Typical Properties

  • CTC Adsorption (% w/w) 50-60
  • Methylene Blue No 180-230
  • Iodine No (mg g-1) 900-1050
  • Surface Area (m2g-1) 950-1100
  • Bulk Density (g cm-3) 0.48-0.52
  • Bulk Density backwashed/drained (g cm-3) 0.42-0.48
  • Moisture Content (% w/w) < 5
  • Hardness % 93-96
  • Water Soluble Ash % < 1
  • pH 7-8

    • Aqua DryCarb is available in the following mesh sizes (US sieve)

    4x10 4.75 mm - 2.00 mm
    6x12 3.35 mm - 1.70 mm
    8x30 2.36 mm - 0.60 mm
    12x40 1.70 mm - 0.425 mm

    Typical Applications

    • Dechlorination
    • Ozone Removal
    • Aquaculture
    • Removal of Taste and Odour
    • Elimination of dissolved Pollutants and Pesticides
    • Protection of RO Membranes and Resins

    Benefits

    • Selected pore structure for maximum adsorption
    • Excellent backwashing characteristics
    • Can be reactivated
    • Efficient dechlorination properties

     

     
    You can reach us by e-mail at: howard@DrydenAqua.com

    Copyright © 1997
    Last modified: March 20, 2008
    Dryden Aqua are manufactures of equipment for water and wastewater treatment, we specialize in environmentally sustainable technology. We conduct our own research & development and have been successful in eliminating many serious environmental as well as water quality problems.
    The content of this web site and information contained therein must not be publicised or reproduced without the prior written consent of Dryden Aqua,
    © copyright 1997