Jariyaporn Punkkom. Increasing efficiency of pasteurize machine in bael drink production by clean technology . Master's Degree(Appropriate Technology for Resources and Environmental Development). Mahidol University. : Mahidol University, 2004.
Increasing efficiency of pasteurize machine in bael drink production by clean technology
Abstract:
In this study, the Cleaning Technology concept which emphasises reusing
reducing and recycling materials and making many small technological adjustment
has been applied in order to increase the efficiency of the pasteurization and cooling
system for the beverage industry. In the first part of experiment, bael juice was the
sample and an old design 55 liter pasteurizing machine was used. The standard
holding time for pasteurization is 15 seconds and the standard temperature is 85 OC .
At these levels, holding time is sufficient to destroy any pathogenic bacteria. The first
objective was check the machine’s performance against these standards. All samples
don’t met the holding time standard, however most( 83.3 %) did not meet the
temperature pasteurized standard. Microbial quality analysis indicated contamination
through aerobic bacteria and yeast and mould in all samples .In the second part of the
experiment, the cleaning technology concept was applied. The medium of heat
transfer was changed, the machine’s height was raised and an improved cleaning
procedure was instituted. Increasing holding time practical follow by operating
manual. The analyses undertaken in the first part of the experiment were repeated.
The improved system reduced the number of samples that did not meet the
temperature standard from 83.3% to 58.33%. All of the samples met the holding time
standard. There was less aerobic bacteria contamination and less yeast and mould
contamination than previous but these were still at 16% and 41.6% about the standard
respectively. Incidental calculations established that the pasteurization process used
2,432 - 2,500 liters of waste water per 1,000 kg. of product and solid waste of 204 –
210 kg . per 1,000 kg . of finished product was generated. In conclusion applying
cleaning technology concept can improve the process to some extent for this machine
still not have enough efficiency for using in plant and it is not the total answer to the
problem.