INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY

Volume 14, No. 07, Month DECEMBER, Year 2018, Pages 1643 - 1656

Application of advance oxidation process combination with fine bubble technology on the reduction of escherichia coli o157:h7 contaminated on bird eye chilli (capsicum frutescens l.)

Pimrat, T., Lilitsajja, P. and Tepsorn, R.

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Nowadays there are continuously increasing worldwide concerns for development of alternative microbiocidal inactivation. Advance Oxidation Processes (AOPs) are considered a highly competitive technology for the elimination of contaminated microorganism due to their high chemical stability and low biodegradability. The effectiveness of UV/O3 in AOP system combination with Fine bubble technology (FB) for the reduction of E. coli O157:H7 contaminated on Bird Eye Chilli (Capsicum frutescensL.) was assesed. A batch-type prototype of the UV/O3 and FB generator treatments were constructed. Consideration the antimicrobial effectiveness of individual technique, the results indicated that the population of E. coli O157:H7 was reduced as 96.36% within 10 minutes 9 when UV were applied. In case of the O3 applications, the results demonstrated that O3 provided 97.18% reduction within 10 min. The application of AOP, UV/O3 system, it can be found that the use of AOP provided 98.62% reduction of E. coli O157:H7. This finding knowledge indicated that AOP with UV/O3 system presented the more antimicrobial potential than the use of UV or O3 alone. The studies of FB with or without AOP on the microorganism elimination were also conducted. FB alone processed contamination reduction of E. coli O157:H7 at 96.53% reduction. The combination with AOP demonstrated 98.05% reduction. The use in dynamic assist process, 99.96% reduction was observed. Furthermore, applying AOP with FB technology in dynamic assist process did not affect the quality of Bird Eye Chilli after washing process. It was indicated the use of UV/O3 as AOP combination with FB technology in dynamic assist process could be applied for microbial contamination reduction on fresh produces.

Keywords

Advance oxidation process, Ultraviolet, Ozone, Fine bubble technology, Escherichia coli O157:H7, Capsicum frutescens L.

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