Home' Otago Southland Farmer : October 5th 2012 Contents 5.10.12 Farmer
MILBURN LIME LTD
Milburn Lime is one of New Zealand's top lime deposits
and is reputed to have the highest quality agricultural lime.
Lime has been supplied from our quarry since 1864
(formerly Dominion Lime & Phosphate Co.) and the lime
is exactly as it was all those years ago, still 95% PURE
(average) and still the whitest clay-free lime.
Milburn Lime is the wise
farmer's choice for the best
results and value.
Tel: 03 417 8228, Fax: 03 417 4009
West Otago Rep: Gordon Sim, 027 4715 614
We can supply processed Limestone
Knaprock for Cow Lanes in different grades
and mixes. We can supply competitively as
far south as Invercargill.
New Zealand's CHEAPEST Culvert Pipes!
PHONE 0800 625 826
FOR YOUR NEAREST
SOUTH ISLAND STOCKIST
300mm x 6 metre .................................$410
400mm x 6 metre .................................$515
500mm x 6 metre................................ $690
600mm x 6 metre................................ $925
800mm x 6 metre............................... $1399
ALL PRICES INCLUDE G.S.T.
FREE joiners supplied on request.
• Lightweight, easy to install
• Made from polyethylene
Calf Weaner Meal or Pellets
• Calf Coarse Mix
• Early Wean Calf Pellets
• Available in 40 or 25kg
• bags & bulk
107 Clyde Street, Invercargill
Phone (03) 214-4305, Fax 214-9135
FREE PHONE 0800 PFC MEAL
- Muesli Mix
- Economy Calf
- Weaner Calf - Hi Protein Calf
- Denkavit Plus CMR
- Pellets/Meals - Rolled Barley
- Bulk Molasses - PK
Something in the water?
Coliform bacteria are usually found in animal faeces and soil, but sometimes it can also be found in a water supply.
To test for coliform bacteria in a milk supply, the
company technicians spread milk on an agar plate,
which is then incubated for 24 hours, the bacteria
growing on the plate is then counted.
By COLIN MORRISON
In most cases however, a coliform grade is usually the result of
poor milking machine hygiene. Coliform bacteria are easily
destroyed, but once coliform bacteria are present in the plant,
they will grow rapidly if the machine is not cleaned quickly and
thoroughly. Hygienic milking and cleaning procedures are
essential to prevent and control coliform bacteria.
If present in the milk supply, rapid growth of the coliform
bacteria will occur if the milk is not cooled to 7°C within three
hours of the completion of milking, and kept constant at, or
below, this temperature.
To test for coliform bacteria in a milk supply, the company
technicians spread milk on an agar plate, which is then
incubated for 24 hours, the bacteria growing on the plate is
Coliform bacteria are easily destroyed by hot water but you will
require water temperatures above 72°C for at least three
minutes. A jetter cleaning system should deliver three litres of
hot water per minute for at least 3 minutes. A rule of thumb
when planning a hygiene program is to allow 10 litres per set of
cups. Always use detergents, both acid and alkaline, at the
correct concentrations, as both of the regimes will prevent any
bacteria growth. Some situations may require extra detergent
however and hygiene reps will be able to give correct
Regularly check the milking machine and bulk milk tank for any
visible deposits. The wash cycle must reach
all plant surfaces, clean any suspect areas
manually if required.
Check areas such as the top of the receiving
can, milk pump seal and pulsators airline for
signs of contamination and always ensure
that the final wash through the milk system
contains a sanitiser, then leave to drain
On the cooling side, check that the plate
heat exchanger (cooler) lets milk into the
BMT at 18°C or less. Generally, a cooler will
only cool milk down to three degrees above
the water which is being used for cooling.
If there are problems here, one solution
could be to fit extra plates or perhaps even a
chiller unit. The refrigeration system must
bring milk to 7°C within three hours of the
completion of milking.
The secret to a coliform free year is the hygiene of both machine
and animals. Make sure that clusters do not fall off and suck up
dirt, replace split liners as soon as they are discovered and
replace all rubber, which comes into contact with milk at least
once a year. Putting a chemical "bomb" through the plant is not
the answer, it may help in the short term but the only real
answer is to find the problem and remove it for good.
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