Combined effect of solar drying and gamma radiation on the microbiological quality of mushrooms (Pleurotus ostreatus (Ex.Fr.)
Journal Title: Scientia Agriculturae - Year 2015, Vol 11, Issue 3
Abstract
The microbiological quality of dried Pleurotus ostreatus stored at room temperature was evaluated after solar drying and gamma irradiation at low doses of 0 (control), 0.5, 1, 1.5 and 2 kGy at a dose rate of 1.7 kGy per hour in air from a 60CO (SLL 515, Hungary) batch irradiator. Moisture content attained after drying was 12-14% at an average drying rate of 0.2 g/gmin-1. Initial microbial counts prior to drying ranged between 1.2- 5.3, 0.95- 1.4, 0-1.39 and 0 -0.8 log CFU/g for Total Viable Count, B.cereus, Yeasts and Molds respectively. Final counts after solar drying and irradiation recorded an average reduction of 0.55, 0.38 log cycles for TVC and B.cereus respectively. However, Yeasts and Mould counts increased after 5 days. There was a general negative linear correlation between solar drying as well as irradiation and microbial quality. The use of solar drying and gamma irradiation was effective in decontaminating mushrooms to acceptable international levels (ICMSF).
Authors and Affiliations
N. K Kortei , P. T Akonor , A. H. K Appia , S. W. O Mill , SNY Annan , JNO Armah , SA Acquah
Keywords
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- EP ID EP122578
- DOI 10.15192/PSCP.SA.2015.11.3.132138
- Views 102
- Downloads 0
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