What's
the difference between the manual and automatic
units?
Both units will automatically
pasteurize your milk. There are two main
differences between the units.
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The first main difference concerns what happens
if the treatment temperature falls below the
set point. In the manual unit, the feed pump
will shut off, stopping the flow of milk through
the unit and preventing any untreated milk
from exiting the system. The unit must then
be manually restarted. In the automatic unit,
a divert valve will automatically re-circulate
the milk in the unit until the treatment temperature
has been re-established. Once the temperature
has been re-established, the divert valve
will automatically open, allowing the milk
to continue through the pasteurizer. Both
will prevent untreated milk from exiting the
system.
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The second main difference concerns the temperature
of the exiting, treated milk. In the manual
unit, the treated milk is cooled in either
an optional cooling section available with
the pasteurizer, or in a farm supplied cooling
section. If no method of cooling is supplied,
the treated milk will exit at or below the
pasteurization temperature and will be air
cooled. In the automatic unit, an included
mixing valve is used to regulate the treated
milk temperature to a desired level. This
unit has a regen section which will use the
incoming cool milk to cool the exiting pasteurized
milk. No cooling water is necessary for this
unit. [ Top ]
How
hot will the milk be exiting the pasteurizer?
In the manual units, the treated
milk is cooled in either an optional cooling
section available with the pasteurizer, or
in a farm supplied cooling section. If no
method of cooling is supplied, the treated
milk will exit at or below the pasteurization
temperature and will be air cooled. In the
automatic units, the treated milk can be set
to a desired temperature using the mixing
valve. [ Top ]
How is the treated milk cooled?
In the manual units, the treated
milk is cooled in either an optional cooling
section available with the pasteurizer, or
in a farm supplied cooling section. If no
method of cooling is supplied, the treated
milk will exit at or below the pasteurization
temperature and will be air cooled. In the
automatic unit, the treated milk is cooled
in the regen section of plates by transferring
its heat to the incoming, cool milk. In turn,
the incoming, cool milk is pre-heated in the
regen section, thus conserving heat and lowering
your operating costs. [ Top
]
Is
the Calf Milk Pasteurizer different than a
batch pasteurizer?
Yes. Unlike a batch pasteurizer,
which is similar to boiling milk in a kettle,
our Calf Milk Pasteurizer quickly heats milk
up to a set temperature and holds there just
long enough to kill any bacteria that may
be present. Our Calf Milk Pasteurizer subjects
the milk to heat for only a few seconds, unlike
a batch pasteurizer that subjects it to heat
for up to 30 minutes or more. [ Top
]
How much milk
can I pasteurize at a time?
Our Calf Milk Pasteurizers
are sized based on gallons per minute. Each
unit comes with a positive displacement feed
pump that regulates precisely how much milk
is treated per minute. The pasteurizer can
be run for any length of time you require.
[ Top ]
What sizes
are available?
The manual units are available
in 1.2 and 2.4 gallon per minute (gpm) flow
rates. The automatic units are available in
2.4, 4.4, 8, and 10 gpm flow rates. [ Top
]
How do I heat
the milk in the pasteurizer?
The milk is heated by a dedicated
water heater re-circulating hot water through
the heat exchanger plates. A water heater
is available from Goodnature. [ Top
]
Does pasteurization
kill Johne's?
Yes. United States Department
of Agriculture (USDA) tests conducted in 1997
showed that "treatment of raw milk at 72°
C (162° F) for 15 seconds effectively killed
all M. paratuberculosis." (J.R. Stabel,
et al., "Heat Inactivation of Mycobacterium
paratuberculosis in Raw Milk: Are Current
Pasteurization Conditions Effective?" Applied
and Environmental Microbiology, Vol. 63, No.
12, December 1997.) This research found
that a turbulent flow of milk during pasteurization
is key to killing Johne's. For this reason,
batch pasteurization is not effective in killing
Johne's. [ Top ]
Calf milk pasteurizers
have been around for a long time.
What is so different about this one?
Batch type calf milk pasteurizers
have been used in the past, but with varying
success. They are slow, difficult to clean,
and can damage the milk and its nutrients
due to long heat exposure. Plus, some diseases
aren't killed during pasteurization when the
milk is not turbulent, like in batch pasteurizers.
[ Top ]
Why should
I switch from milk replacer to a Calf Milk
Pasteurizer?
Because switching will save
you money. Continuously purchasing milk replacer
adds to the already heavy financial burden
that dairy farmers face. In a short period
of time, the money you would have spent on
milk replacer will have paid for the Calf
Milk Pasteurizer. Then from that point forward,
you'll be saving the money you would have
spent on replacer. [ Top
]
I already feed
milk instead of milk replacer, so why should
I buy a Calf Milk Pasteurizer?
Because the milk your feeding
your calves could be contaminated with Johne's
and other bacteria. A 1997 study showed that
waste milk that has not been treated (by pasteurization,
for instance) before being fed to calves
may contain high numbers of pathogenic bacteria
that can adversely affect calf growth. (Selim
SA & Cullor JS. Number of viable and presumptive
antibiotic residues in milk fed to calves
on commercial dairies. Journal of the American
Veterinary Medical Association. 1997;211:1029-1035.
)
A
1996 study (Jamaluddin AA, et al. Economics
of feeding pasteurized colostrum and pasteurized
waste milk to dairy calves. Journal of the
American Veterinary Medical Association. 1996;209:751-755.)
looked at the difference between calves fed
pasteurized and unpasteurized waste milk.
The study found that health expenditures are
lower, average weight gains are higher, and
gross margin is increased by $8.13 per calf
fed pasteurized waste milk, compared to calves
fed nonpasteurized waste milk. [ Top
]
