| Title | The Potential for Milk Pasteurization Using Portable Geothermal Milk Pasteurizer in Dauin, Negros Oriental, Philippines |
|---|---|
| Authors | Christ QUINICOT, Angel HONCULADA |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | direct use, low-enthalpy, lumped system analysis, pasteurization |
| Abstract | A geothermal vat pasteurizer is presented to exploit geothermal energy for direct use in Upper Bulak, Dauin in Negros Oriental. This pasteurization system includes one main vat pasteurizer with an involute water guide. The pasteurizer is equipped with an agitator mechanism with four hemispherical propellers. The geothermal fluid is channeled through a pipe, and because of the involute pathway, the geothermal fluid flows in a circular motion through the small cylindrical reservoir. This drives the movement of the propellers causing the agitator to rotate inside the pasteurizer. Hence, this geothermal vat pasteurization system is an efficient tool to utilize the heat from the source and use the fluid movement to drive the agitator to stir the milk for maximum heat distribution. A lumped system analysis is used to estimate the time the raw milk reaches the required temperature before clocking the milk for the pasteurization process. This analysis is verified by the actual recorded time of 3 minutes during the conduct of the study. The characteristics of the geothermal water in terms of temperature, pH, and flow rate is studied. The characteristics of both the raw and pasteurized milk that uses the geothermal pasteurizer are analyzed. The results indicate that the geothermal resource can reach the required temperature and can hold it for the entire pasteurization process. The results of this study provide a good reference for geothermal direct use applications in the Philippines. |