6) In Gastman’s process, contaminated water is pumped to a
first filter (organic whirlpool separator 12) for removal of silt,
debris and other particles greater than about 70 microns.
(Gastman, col. 6, ll. 59-65).
7) The contaminated water is then pumped through a series of
columnar ozonation vessels 20 where ozone is diffused into the
water. (Gastman, col. 6, l. 65-col. 7, l. 24). The ozone is prepared
in situ in an ozone generator 86. (See col. 8, ll. 37-44).
8) Upon exiting the ozonation vessels 20, the water, containing
from about 0.5 to 8.0 mg/l of ozone is transferred to a partitioned
retention tank 40 to allow oxidation of pathogens, organic matter
and other oxidizable material. (Gastman, col. 7, ll. 25-50).
9) Water from the retention tank 40 then flows to an ultraviolet
radiation chamber 64 where it is subjected to ultraviolet radiation
to catalyze the oxidation reactions of ozone, thereby oxidizing any
residual oxidizable matter. (Gastman, col. 7, ll. 53-57). The water
is also radiated to neutralize the ozone such that water exiting the
ultraviolet radiation chamber 64 is “substantially free of ozone.”
(Gastman, col. 7, ll. 63-65).
10) After exiting the ultraviolet radiation chamber 64, the water
is pumped through a first filter 66 to remove any particulates
greater than about 10 microns in size and then pumped to an
activated carbon filter medium 68 to remove residual odor, taste
and color. (Gastman, col. 8, ll. 1-10).
11) Gastman teaches that “care should be exercised in selecting
materials of construction that come into contact with ozone or
highly ozonated water.” (Gastman, col. 15, ll. 63-65).
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Last modified: September 9, 2013