EFEKTIVITAS MEDAN LISTRIK BERDENYUT TERHADAP PENURUNAN POPULASI Salmonella typhi PADASUSU (Effectiveness of Pulsed Electrical Field on Salmonella Typhi Population Reduction In Milk)

Sri, Djajati and Tri, Mulyani and Iddah, Muawwanah (2013) EFEKTIVITAS MEDAN LISTRIK BERDENYUT TERHADAP PENURUNAN POPULASI Salmonella typhi PADASUSU (Effectiveness of Pulsed Electrical Field on Salmonella Typhi Population Reduction In Milk). Rekapangan : Jurnal Teknologi Pangan, 7 (2). pp. 190-198. ISSN 1978-4163

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Abstract

Milk is an almost perfect food for a complete nutritional content and is a good medium for the growth of microbes, both pathogenic and non-pathogenic. One of pathogenic bacteria that may contaminate the milk is Salmonella typh., All dairy products: either fresh milk, pasteurized, UHT milk, milk powder and Salmonella sp. should not be there at all. One of the non-thermal pasteurization method that can be used for milk pasteurization by using Pulsed Electic Field ( PEF). PEF keep fresh food in physical, chemical and nutitional properties, as well as increasing the shelf life of food. The purpose of this research studid Influence of the number of beats and the distances between the collection rate of the decline in the population of Salmonella typhi, and Influence of the number of pulses and pulse sets the distance between the physicochemical properties of milk). Data were analyzed descriptively. The results showed that the inoculation of Salmonella typhi (incubation for 5 hours at 37 ° C) with a number of 1.98 x 107 cfu / ml effect on the value of total acid, pH, alcohol test, test reductase, and emulsion stability, but has no effect on specific gravity of milk. PEF treatment does not affect the value of total acid, pH, alcohol test, emulsion stability, and density, but the effect on bacterial population decline of Salmonella typhi and test reductase. The decrease in population was obtained from the Salmonella typhi bacteia treatment rate number 1000 and the distance between nodes 2 microseconds pulse. Increased time highest reductase obtained after treatment the number of beats in 1000 and the distances between the collection of 241 microseconds pulse 2 minutes. Initial number of Salmonella typhi was 7.296 log cfu / ml. The highest decline rate was obtained from the treatment the number 1000 and the distance between nodes is 2,225 microseconds pulse 2 log cycles. Keywords: pulsed electic field, Salmonella typhi, population, milk

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