Leon the Milkman
Judging Dairy
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Hi, Milkfans
I was a judge at the National Dairy Championships held by Agri-Expo in the Bellville Civic Centre, near Cape Town today. Thanks, Agri-Expo, it was fun as usual.
May the best products win!
Kind regards,
Leon the Milkman
P.S. check out this following link if you judge dairy as well.
Pseudomonas in Cottage Cheese
Hi, Cheesefans
Got a enquiry recently about why Pseudomonas bacteria love cottage cheese so much.
Well, I think it depends a lot on the flavour. 😉
Seriously Pseudomonas are widely distributed and aerobic. They tend not to use much carbohydrate ( lactose removed from cottage cheese ) and grow well in protein-rich foods (like cottage cheese) producing slime, pigments and some bad odours. They also prefer a high water activity ( high moisture content) and thus cottage cheese is pretty much ideal. Many are also psychrotrophic ( cold-loving ).
Although optimum temperatures are from 15 degrees Celsius to temperate – thus allowing the temperatures to go so high would speed up their growth exponentially.
Goodday to ya,
Leon the Milkman
Automated Milk Analysis and Calibration
Hi, Milkfans
 When doing any automated milk analysis you must remember that the apparatus is calibrated against a certain referance. It is not wise to test cow’s milk on an apparatus that has been calibrated with goat’s milk or vice versa. This has to do with the different sizes of the fat globules, etc.
This is also the reason that ( I think) that goat’s milk digest easier than cow’s milk. It has nothing to do with goat’s milk not having any lactose – that’s nonsense.
 All for today,
Leon the Milkman
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UHT Milk Problems
Hi, Milkfans
UHT milk translates to “Ultra High Temperature” Milk and is also known as long-life milk.
It is made by pasteurizing at something like 132-150 degrees Celsius for a second up to 15 seconds.
To prevent problems it is important that the milk is not going sour, that it has the right salt balance and that there is not too much serum proteins ( colostrum ) in the milk.
Put into practice you should get an analysis of salts in “normal” milk and what variance is allowed to test the milk against. Also make sure the farmer does not have too many cows calving at the same time to prevent high colostrum in the milk.
It is a good idea to do an Alcohol Test on the milk with an alcohol strength of 72-75% alcohol. This will give a fast and accurate indication of the heat tolerance of the particular milk.
Regards,
Leon the Milkman
Density vs. Specific Gravity of Milk
By determining the specific gravity (SG) of milk the following information can be obtained.
• An indication of adulteration of milk with added water.
• If the fat percentage is available the solids-non-fat (or total solids content) of the milk can be calculated.
- Definition
Specific gravity is the relationship of the mass of a specific volume of a substance to the mass of an equal volume of water at the same temperature.
Density is measured as mass per volume (g/ml) at a specific temperature.
The specific gravity of milk at 20 °C is ± 1.030 and is determined by the relative proportions of fat (SG = 0.93), water (SG = 1.0) and solids-non-fat (SG = 1.614).
Kind regards,
Leon the Milkman
Article on Yahoo, Google
Hi, Milkfans
Be sure to check out my newest article on this blog by typing “Even the milkman blogs” into either Google.com or Yahoo.com.
Be sure to claim your free Dairy Dictionary from this site or go directly to www.dairy-info.org to register and get it there.
Feel free to use it in your local publication.
Kind regards,
Leon the Milkman
2% Milk and all that…
Hi, Milkfans
The 2% in 2% milk is a measurement of the fat component by weight – 20 grams per 1 liter is fat.
Cheating to express it that way some consumers say, but we express most other food components in the same way – don’t we? 🙂
Full Cream Milk has about 3.5% fat by weight, so you save about half the calories drinking 2 %.
What you must keep in mind is that 1 liter of full cream milk has about 620 Calories – only about a 5th of what a rather sedentary male of about 175 Pounds needs to maintain his bodyweight! So drinking a liter of milk a day – and I don’t know many people that do that – does not contribute as many calories as people think.
Kind regards,
Leon the Milkman
Clean Cooperative Dairy Milk Production
Hi, Milkfans
When supplying milk to a cooperative it is of vital importance that the cooperative has a milk payment scheme according to which the farmers are paid. This is not only advantageous to the farmers, but also to the cooperative and to the consumers.
For the farmers the results of the test being done help them in managing their business and for the cooperative it means that they get what they pay for. Nobody can make an excellent product from bad raw material.
Meetings have to be held so that there can be agreement on what the specific tests will be and how much each component will impact the milk price. Usually these tests consist of Total Plate Count, Somatic Cell Count(Mastitis test) , Solids ( Fat, Protein and Lactose). Benchmarking to another dairy is of course a good idea.
Other non-qualitative factors that influence the milk price the farmers get are the distance the tankers have to drive to pick up the milk and the volume of milk supplied by the specific farmer.
This is the basics of management of paying for clean cooperative dairy milk production.
Kind regards,
Leon the Milkman
P.S. See the previous post for more on cleaning dairy equipment.
Cleaning Dairy Equipment
Hi, Milkfans
Like in life – so it is with dairy – always remember the basics!
When cleaning dairy equipment always give a cold water rinse until the water runs clear, then hot water alkaline, rinse, acid, rinse and finally sanitiser.
I still see hot water being used initially and that will definitely leave a protein deposit. Ask your mom about this – any protein stain must get as little heat as possible.
Some additional points: Clean all milk contact surfaces – If milking more than once per day; go through the whole cleaning process every time.
Bacteria come from many sources on the farm – animals, air, water, equipment, people and feed.
Check absolutely everything.
Kind regards,
Leon the Milkman
Cheesemaking Nuns!
Hi, Milkfans
Today and tomorrow I am teaching four nuns from Uganda, Africa to make Feta and Mozarella cheese!
They are a real treat to be with and are enjoying the course tremendously. Will see if I can get it right to post some pictures after the weekend. Will want to put some audio on the site as well sometime in next week.
Kind regards,
Leon
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