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Condensed Milk Processing Line Dairy Processing Line evaporated milk plant
Description of Condensed Milk Processing Line Dairy Processing Line
A process line for sweetened condensed milk manufactured from fresh milk.
Figure below shows a process line for sweetened condensed milk
manufactured from fresh milk. Before evaporation, the fat and
solids-non-fat values of the milk have been standardised to
predetermined. The milk has also been heat treated to destroy
micro-organisms and enzymes which could cause problems and to
stabilise the protein complex. Heat treatment is also important to
the development of product viscosity during storage, and is
particularly important in the case of sweetened condensed milk. The
addition of sugar is a key step in the manufacture of sweetened
condensed milk, as the shelf life of the product depends on its
osmotic pressure being sufficiently high. A sugar content of at
least 62.5% in the aqueous phase is required. Two methods are used
for addition of sugar:
•Addition of dry sugar before heat treatment
•Addition of sugar syrup in the evaporator
The stage at which the sugar is added affects the viscosity of the
end product. The evaporator is usually of the multistage
falling-film type. When sugar is added in the evaporator, the syrup
is drawn into the evaporator and mixed with the milk at the
half-way stage of the process. Evaporation then continues until the
required dry matter content has been reached. The dry matter
content is checked continuously by determining the density of the
concentrate.
Sweetened condensed milk must be cooled after evaporation. This is
the most critical and important stage in the whole process. The
water in the condensed milk can only hold half the quantity of
lactose in solution. The remaining half will therefore be
precipitated in the form of crystals. If the surplus lactose is
allowed to precipitate freely, the sugar crystals will be large and
the product will be gritty and unsuitable for many applications. It
is consequently preferable to control the crystallisation of
lactose so that very small crystals are obtained. The required
crystallisation is accomplished by cooling the mixture rapidly
under vigorous agitation, without air being entrapped. The cooled
condensed milk is pumped to a storage tank where it is kept until
the following day to allow the crystallisation process to be
completed.
Sweetened condensed milk should be yellowish in colour and have the
appearance of mayonnaise. Traditionally, it is packed in cans,
which in this case must be cleaned and sterilised before filling as
no sterilisation takes place after canning. Nowadays it is also
possible to pack sweetened condensed milk in aseptic paperboard
packages. The product is also packed in big barrels, holding about
300kg, for supply to large-scale users.
Advantages of Condensed Milk Processing Line Dairy Processing Line
* Opportunity to realize products with customized recipes.
* Opportunity to produce more than one product with the same
processing line.
* High quality of the final product keeping an elevated nutritional
value.
* Wide customization of the final product.
* Maximum yield, minimum production waste.
* Highest energy savings thanks to the most advanced technologies.
* Complete line supervision system through monitoring of every
process phase.
* Recording, visualization and printing of all daily production
data.
Features of Condensed Milk Processing Line Dairy Processing Line
Working capacity | from 5 tons/d up to 100 tons/d |
Products | - Sweetened condensed milk - Evaporated milk - Condensed milk in varied package: Can, aseptic paperboard packages, big barriers; etc. |