AWWA JAW10125

Granular activated carbon can remove organic contaminants from water supplies, but subsequent desorption of these contaminants can occur. The research reported in this article was performed with a verified mathematical model to evaluate factors affecting desorption caused either by a reduction in influent concentration or by competition. The factors studied were mass transfer coefficients, equilibrium capacity characteristics, and process variables such as bed length, hydraulic loading, and carbon particle size. Under conditions roughly approximating treatment plant operation, results indicate that the time during which the concentration in the effluent is higher than that in the influent can be significant, possibly on the order of weeks. A system designed for efficient adsorption may also provide for efficient desorption. The mathematical model employed by the authors, as well as study methods, is outlined in this article. Includes 22 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

03/01/1983

Number of Pages:

6

File Size:

1 file , 1.5 MB