Study On The Application Of Washing Method To The Treatment Of Fresh-cut Lettuce And Cherry

Fresh cut vegetables in the international community has become a new situation of commercialization of vegetables.Fresh-cut vegetable processing technology in recent years,the world's fastest growing vegetable processing a practical technology.The cleaning process is an important part of the process of fresh-cut vegetables.In this paper,fresh cut lettuce and cherry tomato were used as experimental materials to study the effect of different cleaning methods on fresh cut vegetables,so as to explore the safe and efficient cleaning technology suitable for industrial application.The research methods and main conclusions are as follows:(1)through the electrolysis of water to wash fresh vegetables,to determine the appropriate fresh vegetables for cleaning process parameters.The results show that cleaning for 20 min will not cause the appearance of fresh cut vegetables quality changes;sodium hypochlorite can wash lettuce 3 times,cherry tomatoes 4 times,electrolysis of water can wash lettuce 5 times,cherry tomatoes more than 6 times,while electrolysis of water to wash lettuce than sodium hypochlorite Saving 2.7 L / kg,cleaning cherry tomato water saving 0.23 L / kg,so electrolytic water cleaning effect is more significant.,And will not be affected by ACC and ORP.(2)to observe the different cleaning methods of fresh vegetables after storage of storage quality changes.The study found that,compared with the traditional sodium hypochlorite,electrolytic water treatment in fresh vegetables,hardness,weight loss,color,chlorophyll,vitamin maintenance and antibacterial aspects,can achieve better results.The use of sodium hypochlorite cleaning cherry tomatoes for preservation,can extend the shelf life of more than 14 d;use of electrolyzed water to clean fresh lettuce for storage and preservation,can extend the shelf life of more than 7 d,get better results.Comprehensive analysis,electrolysis of water to extend the shelf life of fresh vegetables the best.(3)· OH has a significant effect on the cell membrane,cell structure and DNA of E.coli.The results showed that E.coli treatment was able to reach more than 99% of the E.coli lethal rate,the damaged cell membrane folds,rough and intracellular material outflow caused E.coli death.The longer the treatment time,the more severe the condition is that the E.coli DNA cleavage is treated.