Info

PCT plant

500-1800 lb/106 gal

Tertiary plant

200-500 lb/106 gal

Bed depth

Source: U.S. Environmental Protection Agency, 1985, Handbook, remedial action at waste disposal sites, EPA/625/6-85/006 (Washington, D.C.: U.S. EPA).

Source: U.S. Environmental Protection Agency, 1985, Handbook, remedial action at waste disposal sites, EPA/625/6-85/006 (Washington, D.C.: U.S. EPA).

where:

qc = carbon usage rate, lb/gal

Vc = volume of carbon, lb

Vw = volume of water treated when the required effluent concentration is exceeded, gal

Carbon usage rates are then plotted for each contact time as shown in Figure 9.17.12. The optimum contact time tcopt is determined as the time which provides the lowest carbon usage rate. The optimum volume of carbon bed needed is calculated as where:

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