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i <br />Typical Pressure Drop <br />Based on a backwashed and segregated bed <br />Superficial Velocity (cm/sec.) <br />0.07 0.14 0.20 0.27 0.41 0.68 <br />10 8.2 <br />v 6 4.9 <br />a 4 3.3 w <br />o <br />3 2.5 `o <br />2 1.6 <br />2C/35°F i s <br />1 0.82 0 <br />0.613CIF 0.490 <br />0.4-24C/75°F 0.33 w <br />0.3 a <br />i 0.2 0.016 <br />0.1 I I I 1 1 I 1 I 0.082 <br />1 2 3 4 5 6 7 8 9 10 <br />Superficial Velocity (gpmO) <br />Custom Reactivation <br />Municipal drinking water utilities can extend the life of their <br />FILTRASORB granular activated carbon while lowering their operating <br />costs through participation in Calgon Carbon's Custom Municipal <br />Reactivation (CMR) program. <br />After a granular activated carbon's adsorptive capacity has been <br />exhausted, it can be returned to Calgon Carbon for thermal <br />reactiva-tion (upon carbon acceptance approval). In the reactivation <br />process, the spent activated carbon is heated to a high temperature <br />g in furnaces devoid of oxygen, using steam as a selective oxidant. <br />J The high temperature reaction with steam serves to restore the <br />adsorptive capacity of the activated carbon. <br />The CMR program ensures that each customer receives their <br />own GAC back after reactivation. The benefits of using a custom <br />reactivated GAC versus a virgin carbon are several, including: a) <br />economic, as reactivated GAC costs less than virgin GAC, and <br />b) environmental, as use of reactivated GAC conserves natural <br />resources and reduces CO2 emissions compared to the manufacture <br />of virgin GAC. Another benefit of reactivating and reusing spent <br />granular activated carbon is the ability for customers to ensure for <br />themselves a reliable supply of GAC when needed, as the spent/ <br />reactivated carbon represents a renewable resource. Finally, <br />through reactivation, the costs and long-term liability associated with <br />disposal of spent GAC are eliminated. <br />The combination of high mechanical strength and the dense <br />granular structure of FILTRASORB brand GAC, a product of both <br />the bituminous coal starting material and the reagglomeration <br />manufacturing process, results in a GAC ideal for reactivation, with <br />excellent adsorptive performance and low losses. <br />Typical Bed Expansion During Backwash <br />Based on a backwashed and segregated bed <br />Superficial Velocity (cm/sec.) <br />0.34 0.68 <br />1.02 1.36 1.7 <br />0% <br />2C/35°F •• <br />13C <br />55°F/24C/ <br />0 <br />• <br />0 <br />0 <br />0 <br />M <br />0 5 <br />10 15 20 <br />9F <br />Superficial Velocity (gpm/ftz) <br />Design Considerations <br />75T <br />As a replacement for existing filter media, conversion to <br />FILTRASORB 300-M granular activated carbon imposes no major <br />change to a plant's normal filtration operations. If more contact time <br />is required, the height of the backwash troughs can be increased. <br />Calgon Carbon Corporation can also provide complete modular <br />adsorption systems as an add -on treatment stage if required. <br />Safety Message 1.800ACARBON calgoncarbon.com <br />Wet activated carbon can deplete oxygen from air in enclosed spaces. If use in an enclosed © Copyright 2015 Calgon Carbon Corporation, All Rights Reserved <br />space is required, procedures for work in an oxygen deficient environment should be followed. DS-FILTRA30OM16-EIN-El <br />