Why you should not use milk plate coolers ...

 
charriau
Sales manager

A good picture ... (this is a dairy plant heat exchanger plate)

images/produits/milk-plate-cooler-bad2.jpg

http://www.elite-magazin.de/imgs/3/6/0/0/3/7/3a72c4170d7b65c5.jpg

An australian document with advice concerning cleaning and regasketing.

Critical Review of Milk Fouling in Heat Exchangers. This is of course for industrial purposes, but principle stays the same in a dairy farm.

Dernière modification par charriau (2013-06-17 16:34)

 
charriau
Sales manager

images/produits/milk-plate-cooler-bad3.jpg

filter is also to be changed at each milking.

This increase operation costs as you have to buy the filter, change it twice every day and dispose it.

images/produits/milk-plate-cooler-bad4.jpg

buckets ... (not to mention the installation to change filters)

images/produits/milk-plate-cooler-bad6.jpg

who still wants to clean manualy ???

images/produits/milk-plate-cooler-bad5.jpg

sometimes even a by-pass in order for the CIP to work properly ...

Dernière modification par charriau (2013-06-17 16:34)

 
charriau
Sales manager

Mechanical stress

Unpleasant flavours can develop in on-farm milk, and are often described as soapy, bitter or rancid tastes.
Such undesirables flavours are caused by a breakdown of the milk fat to produce free fatty acids. The process is called lipolysis and is caused by the enzyme lipase.

Lipase is present in raw milk but requires certain conditions to enable it to attack the milk fat.

Normal pasteurisation inactivates the enzyme preventing further breakdown of the fat due to lipase activity but does not remove any unpleasant flavour that is already present.

A protective membrane of complex fats and proteins protects the fat globules in milk from attack by lipase which is mainly in the skim milk.

But there are particular physical and chemical actions that can disrupt  the protective membrane allowing lipase access to the fat globules, causing lipolysis and bad tastes.

https://dolcera.com/wiki/images/thumb/800px-MFGM_STR.gif

Passage of milk through plates or with any process involving vigorous agitation or stirring causes foaming or frothing.

Go ask any (real) cheese producer about it ...

Dernière modification par charriau (2012-11-19 15:07)

 
charriau
Sales manager

Milking robot and plate cooler cleaning

Milking robot pump flow is low, <0.5 to 1 liter of milk/second against 3-4 liters/second for conventional milk pumps.

Milking robot installation have a milk pipe diameter of 25. If inlet diameter of the plate cooler is 50, washing is not going to be very efficient ...

So be careful when washing plate coolers when a milking robot is in place.

Dernière modification par charriau (2012-11-21 08:38)