AGW-4015/4025/4045 Skid-Mounted Ozone Sanitation Systems
8
Dissolved Ozone Monitor/Controller
By far the most accurate way to measure and
control the ozone in the water, a dissolved ozone
monitor/controller may be used to ensure that the
water is completely charged before starting the tim-
ing of the cycle, as well as providing a continuous
monitor for observation. In addition, it can be used
to control the ozone system so that the tank of water
can be main tained continuously and stays charged
at the exact amount determined by the adjustable
set-point; it will cycle the ozone system on and off
as needed to maintain the set-point.
Indigo Blue Ampules with Colorimeter (Hach Ac-
cuVac Test Kit)
This method can be used to determine the amount
of ozone at the discharge of the CIP (at the end
of the cycle). It cannot be used to determine the
amount of ozone in the
ozone charge tank
because
the highest range of detectability is
1.5 PPM
. There-
fore, refer to the
Ozone Tank Charging Guidelines
,
charge
the
ozone charge tank
for the proper amount
of time and then begin the CIP. After 30 minutes,
test the dis charge water with the Hach AccuVac
Ampule. If there is 1.0 - 1.5 PPM ozone in this
discharge water, it can be safely determined that the
system is sanitized.
4E-1. CIP (Clean In Place)
4E-1a.
Refer to the
Ozone Tank Charging Guide-
lines
. Determine the amount of water in the ozone
charge tank. Operate the AGW-4015/4025/4045
for the proper amount of time based on the amount
of water in the ozone charge tank, and charge the
water to ap prox i mate ly 3 PPM. The time necessary
to ac com plish this is de pen dent on the volume of
water in the tank. Once the water is charged with 3
PPM ozone, CIP op er a tion can begin. Experience
dictates that 15 - 30 minutes of CIP operation with
an applied dose of 3 PPM is an acceptable amount
of time to attain a zero microbial count. A longer
duration will not cause any harm. Individual pref er-
enc es vary, but 30 minutes is the rec om mend ed
optimum.
4E-1b. General Tank Sanitation -
See page 3,
drawing 3B.
Wash debris and rinse the tank with
clean water. Connect the AGW-4015/4025/4045
to
the tank and recirculate the system while spraying
with any standard spray ball. Approximate spray
time is 15-30 minutes.
4E-2. Facility Washdown
Refer to the
Ozone Tank Charging Guidelines
.
Determine the amount of water in the ozone charge
tank. Operate the AGW-4015/4025/4045
for the
proper amount of time based on the amount of wa-
ter in the
ozone charge tank,
and charge
the water
to ap prox i mate ly
2-3 PPM
.
The time necessary to accomplish this is dependent
on the volume of water in a given tank. Once the
water is charged with
2-3 PPM
ozone, a spray rig
can draw this ozone charged water from the
ozone
charge tank.
CAUTION: Maximum pressure 22 psi - higher
pressure will result in excessive ozone off-gas!
The spray can be di rect ed on fl oors, drains, walls,
wettable equipment, external or internal tanks, clean
rooms, etc. (If the ozone spray is being applied in a
very small, en closed, poorly ventilated area, it may
be nec es sary to wear a standard ventilator to avoid
the inhalation of ozone gas. Breathing ex po sure to
greater than 0.1 PPM ozone gas can irritate eyes
and sensitive lung tissue. Please see the
Safety
Section 7
for further details and a Material Safety
Data Sheet on ozone.)
Based on industry experience, the amount of time
nec es sary to attain san i ta tion de pends on the
amount of debris found in the area to be cleaned.
Sweep or remove heavy surface dirt fi rst to ex pe dite
the ozone clean ing process. Time es ti mates for
proper san i ta tion are diffi cult to predict due to the
variety of areas, surface materials and contami-
nants. How ev er, experience and studies support
that
30 sec to 2 minutes
of spray time is generally
all that is nec es sary for complete sanitation. DEL
rec om mends that end-users utilize their own san i -
ta tion effi cacy testing protocol to de ter mine nec-
es sary spray time.
4E-3. Direct Contact - Spray Nozzle, Flume, Cas-
cade
Applications vary. Please contact DEL for advice/
consultation at 800-676-1335.
4E-4. General Water Sanitation/Disinfection
Applications vary. Please contact DEL for advice/
consultation at 800-676-1335.
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