LED深紫外线杀菌特性及其在草莓保鲜中的应用  

Bactericidal properties of LED deep ultraviolet light and its application in strawberry preservation

作　　者：尹国亮 王明明 刘浩明 陈喆 陆乃彦[1] 唐雪[1] YIN Guoliang;WANG Mingming;LIU Haoming;CHEN Zhe;LU Naiyan;TANG Xue(School of Food Science and Technology,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学食品学院,江苏无锡214122

出　　处：《食品与发酵工业》2024年第22期76-82,共7页Food and Fermentation Industries

基　　金：国家自然科学基金(31871865);2021年江苏省高等教育教改研究立项项目(2021JS1G058);教育部第二批新工科研究与实践项目(E-SPNL20202312);教育部“新农科”研究与改革实践项目(2020402)。

摘　　要：LED深紫外灯作为替代传统汞灯的新兴力量,在未来食品杀菌方向有着广泛的应用前景。该研究首先以大肠杆菌为实验对象,获得合适的LED深紫外灯组合方案。其次通过所得到的LED深紫外灯组合分别对大肠杆菌、金黄色葡萄球菌、铜绿假单胞菌进行不同时长的深紫外线杀菌处理,探究深紫外线照射时间对不同致病菌杀菌率的影响。最后以草莓为实验材料,通过定期调查其坏果率、腐败指数、失重率及感官变化,探究LED深紫外线照射对草莓保鲜的效果。研究发现染菌平板正上方与侧方各有3个LED深紫外灯时,杀菌效果最好。随着LED深紫外线处理时长的延长,杀菌率逐渐上升,且对LED深紫外线的敏感性:金黄色葡萄球菌<铜绿假单胞菌<大肠杆菌。草莓采摘后进行适当时长的LED深紫外线处理对控制病变、保障品质等具有良好的效果,LED深紫外线处理与密封冷藏对提高草莓保鲜效果具有协同作用。As an alternative of traditional mercury lamps,LED deep ultraviolet lamps have a wide application prospect in the food sterilization field.Firstly,by taking took Escherichia coli as the experimental object,an appropriate combination scheme of deep ultraviolet lamp was explored.Secondly,using the combination of LED deep ultraviolet lamp to sterilize E.coli,Staphylococcus aureus and Pseudomonas aeruginosa with different duration of deep ultraviolet light,the effect of deep ultraviolet irradiation time on the bactericide rate of different pathogenic bacteria was studied.Finally,the effect of LED deep ultraviolet radiation on strawberry preservation was explored by regular investigation of their bad fruit rate,decay index,weight loss rate and sensory changes.In the study,it was found that the sterilizing effect was best when there were three LED deep ultraviolet lamps on the top and the side of the plate,and the bactericide rate increased with the extension of irradiation time.The sensitivity to LED deep ultraviolet light showed:S.aureus<P.aeruginosa<E.coli.After strawberries were picked,LED deep ultraviolet treatment for a proper duration had a good effect on disease control and quality assurance.In addition,LED deep ultraviolet treatment and sealed refrigeration had a synergistic effect on improving strawberry freshness preservation effect.

关 键 词：LED深紫外灯 紫外线杀菌 杀菌率 草莓保鲜 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]