TY  - JOUR
T1  - Performance Efficiency of In-line Stirred Yoghurt Machine Modeling for Use in SMEs
AU - Jitjaroen, W. AU - Jitjaroen, A. AU - Suvannakita, A. AU - Bunthawong, O. 
JO  - Journal of Engineering and Applied Sciences
VL  - 9
IS  - 6
SP  - 243
EP  - 248
PY  - 2014
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2014.243.248
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2014.243.248
KW  - Yoghurt
KW  -pasteurization
KW  -incubation
KW  -shell and tube heat exchanger
KW  -energy efficiency
AB  - A prototype in-line stirred yoghurt machine was designed and constructed for use in SME dairy plants and education establishments. The prototype consisted of mixer, pre-heater, pasteurizer, cooler, incubator and filling systems all necessary processes were aggregated within a 2.8 m<SUP>2</SUP> steel base. The operation of production was controlled by a set of Programmable Logic Controller (PLC) and/or one personal computer. Testing was done with a yoghurt mix. Results showed that the pasteurization system, using heat from a small gas burner transferred to the flowing raw milk through heat exchangers, destroyed all pathogenic microorganisms. Thereafter, the yoghurt mix was incubated in an insulated stainless steel tank at 42&deg;C for 3 h, then cooled to 20-25&deg;C over 30 min and total acidity of product was not &gt;0.76%. Production capacity was approximately 100 cups h<SUP>-1</SUP> by one operator. Overall, it was felt the prototype offered significant advantages in terms of its small size, portability and ease of operation. The 73% energy efficiency will also offer significantly reduced production costs.
ER  -