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Using Inclined Cascade Aeration to Strip Chlorinated VOCs From Drinking Water
Author(s) -
Boyden Brace H.,
Banh Duong T.,
Huckabay Houston K.,
Fernandes Joseph B.
Publication year - 1992
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1992.tb07355.x
Subject(s) - aeration , cascade , tower , chemistry , desorption , environmental chemistry , mass transfer , analytical chemistry (journal) , environmental science , environmental engineering , chromatography , adsorption , organic chemistry , civil engineering , engineering
Inclined cascade aeration (ICA) was effective in removing 10 chlorinated volatile organic chemicals (VOCs) from drinking water at liquid loadings of 5 gpm/ft (1.04 L s –1 /m) to 15 gpm/ft (3.1 L s –1 /m). Overall mass transfer (or desorption) coefficients (K L a v ) were an order of magnitude larger (0.08–0.54 s –1 ) than those reported for packed‐tower aeration. A curve fit of the experimental data for all 10 VOCs with the equation K L a v = 0.019 + 0.091 (Hp) $f14 (sin θ) $ , in which Hp is the Henry's law constant (atm) and θ is the angle of inclination, yielded desorption coefficients within ± 18 percent of experimental values. A cascade angle of 60° was found most efftcacious for compounds with Hp values >300 atm; compounds with Hp values <300 atm were most effectively stripped at yet steeper angles.