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PERSNICKETY® Brand Odor Countervailant™
312 Wet Scrubber Formula is compounded to replace or augment
chemical oxidants such as chlorine, sodium hypochlorite and
chlorine dioxide in wet scrubbers. The two most commonly used
wet scrubber designs are recirculating packed bed and mist
(see page 3). While considerably different in design and
operation, their shared historical purpose is to collect and
absorb air-borne nuisance malodors into a liquid solution
containing water and an oxidant chemical so that treatment can
occur in the liquid phase. Inorganic malodors such as hydrogen
sulfide and ammonia are highly soluble in water, but many
organic malodors are not. Any malodor escaping absorption
obviously cannot be treated by oxidants. (See Syneco Systems,
Inc. FORM NO.
151, for greater detail.) 312 Wet Scrubber
Formula provides the following very important advantages when
used as the sole odor control agent or in conjunction with
chemical oxidants:
-
Able
to react in both liquid and gaseous phases.
-
Used
successfully on even the most complex and intensive
combinations of inorganic and organic malodors, such as
those in the rendering industry.
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Functions
effectively in all operating ranges of temperature and pH.
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Is
not affected by the presence of extraneous, non-malodorous
organics.
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Contains
no toxic materials and forms no toxic
by-products when used alone or with
oxidants.
-
Is
non-explosive, non-flammable and
non-corrosive.
-
Biodegrades
fully and forms no damaging decomposition
by-products.
-
Meets
national and international health and
safety standards.
-
Often
reduces chemical operating costs.
-
Reduces
or eliminates costs associated with
removal of scaling caused by acid/base
processes.
-
Cleans
and controls accumulations of fats, oils
and greases on packing media.
-
When
used alone, eliminates corrosive
destruction of equipment caused by
corrosive oxidants.
-
Potentially
allows capital expansion avoidance via
improved operating efficiency.
Application
rates for 312 Wet Scrubber Formula are largely
dictated by the intensity of malodor. The
proper rate establishes an equilibrium between
malodor and 312 Formula. This equilibrium is
illustrated below.
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In
practice, a steady-state malodor loading is
not always present. Therefore, many customers
choose to operate with a faint odor of 312
Formula present to act as an olfactory guide
in order to provide a buffer zone.
For
recirculating packed bed scrubbers, 312 Wet
Scrubber Formula can be fed directly into the
reservoir or into the line feeding the
spraying system above the packing. Most mist
scrubbers do not recycle scrubbing liquids,
consequently choice is limited to the line
feeding the nozzle. On-hand dosing pumps will
normally work well. 312 Formula can be fed in
its concentrated form, but most users dilute
with water to make up a 1-2% solution in a day
tank or empty 55 gallon drum and feed the
diluted solution.
This
approach is preferred for several reasons. An
improper pump setting or a malfunctioning pump
could become very costly by delivering far too
much concentrated 312. For mist scrubbers it
is desirable to have a rapid pump stroke to
avoid a gap effect (water, 312, water, 312) in
the scrubbing liquid line.
The
precise feed rate must be determined on site.
In addition to malodor intensity, feed rate
will be influenced by odor composition, bleed
and make-up rates, recirculation rates, CFM
and contact time provided and the general
maintenance of the system.
Good
starting guidelines can be provided. For
packed bed scrubbers the Loading Standard is
rendering cooking malodors (blood, offal,
feathers, bone meal). For mist scrubbers the
Loading Standard is malodorous domestic
wastewater, headworks locations. Weigh the
intensity of the malodors under consideration
against these Standards, and increase or
decrease the recommended starting application
rate accordingly.
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(concentrated 312 Formula) |
| SCRUBBER
TYPE |
PER
10,000 CFM FLOW |
PER
100M3/MINUTE FLOW |
| Packed
Bed |
.67
fl. oz./hour |
7
cm 3/hour |
| (rendering
Standard) |
19.8
cm 3/hour |
|
| Mist |
1.0
fl. oz./hour |
10.5
cm 3/hour |
| (domestic
Standard) |
29.57
cm 3/hour |
|
| (conversions) |
1
fl. oz. = 29.57 cm 3 |
1
m 3 = 35.31 ft 3 |
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The
treatment solution is sprayed over the packed
bed where it falls through the packing to a
sump beneath. Malodors transfer from the
gaseous phase to the liquid phase when
collected air is forced through the moistened
packing. Air residence time through the bed is
often only a few seconds, so sufficient air
pressure is critical to the transfer. From
the sump, the treatment solution is
recirculated over the top of the packing.
Fresh solution is added on the way to retain
needed strength. This feed loop includes a
chemical solution tank, metering pump and
piping, a recirculation pump and associated
piping and valves.
A
portion of the spent solution in the reservoir
is wasted (bled) in order to remove treated
malodors and accumulated solids. To make up
for bleed loss and evaporation loss, fresh
water is added. |
|

Mist systems operate on similar principles to
the recirculating packed bed systems except
there is no recirculation of the spent solution,
and considerably less water is used. The
treatment solution is atomized or sprayed
through nozzles to achieve maximum solution
break-up. The malodorous air is mixed with the
mist particles in a reaction vessel, where the
malodors are transferred into solution.
Condensate from the reaction vessel is wasted.
The fine mist particles are primarily discharged
with the treated airstream. The size of mist
particles required for a specific degree of
malodor control is not yet well defined.
However, the smaller the particle size, the
greater the total surface area produced,
promoting maximum gas transfer. Typical
residence time within the reaction vessel is 10
to 15 seconds. |
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Weight
per Gallon
Weight per Liter |
8.37
lbs
2.21 lbs. |
Specific
Gravity @ 77° F
Specific Gravity @ 25° C |
1.004
1.004
|
Boiling
Point ° F
Boiling Point ° C
|
205°
95.2°
|
Flash
Point ° F
Flash Point ° C
|
>
200°
> 93.3°
|
Solubility
in Water @ 77° F
Solubility in Water @ 25° C |
Soluble
Soluble |
| Color |
Green |
| Toxicity |
Non-toxic,
non-hazardous. Good
housekeeping procedures and
general principles of safety
should be observed when
handling any chemical product. |
| First
Aid |
Skin
contact - in cases of
prolonged skin contact, wash
off with soap and water. If
any irritation exists, seek
medical advice.
Eye
contact - wash eyes with lots
of water for at least 10
minutes and seek medical
advice.
If
swallowed - drink lots of
water and seek medical advice
immediately. Consult
material
safety data sheet. |
| pH |
7.4
- 7.6 |
| Corrosivity |
Non-corrosive |
| Biodegradability |
Fully
biodegradable |
| Packaging |
5
U.S. gallon pails, 55 U.S.
gallon drums |
| Shelf
Life |
12
months in unopened containers |
| Storage |
Protect
from freezing. Do not store in
temperatures above 120° F,
48.9 ° C. |
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:
Our only obligation shall be to
replace or pay for any material proved
defective. Beyond the purchase price of
materials supplied by us, we assume no liability for
damages of any kind and the user accepts the product
"as is" and without warranties, expressed or
implied. The suitability of the product for an
intended use shall be solely up to the user.
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© 1994-2007 Syneco Systems, Inc. All Rights Reserved.
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