Design and performance assessment of a flat-plate solar milk pasteurizer forarid pastoral areas
Date
2011Author
Wayua, Francis Obuoro
Okoth, Michael W
Wangoh, John
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
A solar milk pasteurizer consisting of flat-plate water-heating collector and a
1.5-mm thick stainless steel cylindrical milk vat was designed and tested in an arid
pastoral area of northern Kenya.The milk vat had a capacity of 80 L and a 50-mm
widehotwaterjacketinsulatedwith38-mmthickfiberglass.Hotwaterproducedby
the collector was used for pasteurizing milk. The optimum quantity of milk that
could be pasteurized by this device under the study conditions was 40 L, and the
average temperature difference between hot water and milk being pasteurized was
8.1 1.4C.Totalbacterialcountsinpasteurizedmilkwerelessthan10 cfu/mLwhile
coliformcountswerenegative.Thislow-costsolarmilkpasteurizerisappropriatefor
arid pastoral areas without grid electricity, where milk marketing is an important
incomesource,andwheremostofthemilkisboiledusingfirewood.
Citation
Journal of Food Processing and Preservation, November 2011Publisher
Department of Food Science, Nutrition and Technology