Abstract
A study was carried out to test the efficacy of UV- C treatment to decontaminate fungal species in black pepper. After preliminary tests carried out using a UV-C drum, a canopy type UV-C sterilization unit was designed and fabricated. Black pepper seed and powder samples were given 10, 15, and 20 minutes UV- C treatments. Results showed that UV-C canopy is effective on inactivation of yeast and moulds in black pepper seeds complying the international microbiological standard requirements for spices. Improvement of UV-C Design modification have been carrying out to obtain the potential inactivation level by UV-C light for black pepper powder and improve the inactivation level of bacteria in black pepper seed and powder.
Highlights
Black pepper is mainly used to augment the distinctive flavour, aroma, colour and fragrance of food
Thermal sterilization is achieved with high intensity of heat and still this is the main technique that used in the spice processing industry including black pepper [5]
Preliminary UV-C treatments were carried for black pepper spowder using a UV-C rotating drum fabricated to obtain initial UV-C microbial inactivation data
Summary
Black pepper is mainly used to augment the distinctive flavour, aroma, colour and fragrance of food. Black pepper has a high potential of microbial contamination including fungus during preand post operations till final market packing [1]. Thermal sterilization is achieved with high intensity of heat and still this is the main technique that used in the spice processing industry including black pepper [5]. High heat in thermal sterilization may change quality of spices in cases of sensory, functional and nutritional aspects due to thermal degradation. These thermal losses can be prevented by introducing nonthermal sterilization method [6] such like UV-C (200-280 nm) [7]. The objective of this study was to test the UV- C system developed to inactivate fungal species contaminated in black pepper seeds and black pepper powder and identify modifications necessary for to optimize the system to obtain potential decontamination level of UV-C light
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