176 



CONDENSED BUTTERMILK 



case of continuous evaporation the milk is kept at a constant 

 level, the lower part of the revolving cylinders dipping into it 

 and picking up a film which is automatically scraped off with 

 every revolution of the cylinders. 



At the same time air is blown through the hot milk, further 

 assisting in the evaporation and also removing gases and other 

 volatile substances from tj^f milk. 



During operation the-l^polving cylinders are charged with 

 40 pounds of steam and the" temperature of the milk is held at 

 about 145 degrees F. 



The process of condensing can be carried to almost any de- 

 gree of concentration and the desired degree of density is deter- 

 mined in a similar manner as in the case of evaporated milk 

 and plain condensed bulk milk. 



Capacity. This machine is constructed in several sizes, 

 with capacities ranging from 900 pounds to 8000 pounds of 

 raw milk per hour, based on a ratio of concentration of two 

 to one, as shown in the following specifications : 



Quality of Products from Continuous Concentrators and 

 Evaporators. -When properly operated and when using a good 

 quality of raw material these continuous concentrators and film 

 evaporators yield a product of excellent flavor and good quality, 

 especially suitable for the manufacture of ice cream, but also 

 applicable for the manufacture of sterilized evaporated milk, 

 condensed buttermilk and condensed whey. 



CHAPTER XV. 

 CONDENSED BUTTERMILK. 



*<?*.' The vallre of buttermilk as a part of the feed ration for 

 chickens, laying hens, pigs and hogs has long been recognized 



