Food safety issues have become a hot topic. And it is getting more and more attention from everyone. In modern farming, the application of pesticides is unavoidable. Although the fruits and vegetables sold on the market have passed inspections. They meet national standards. But still can't reassure everyone.
Most people think that pesticides used in the process of growing will leave residues on the surface. Many businesses have seen everyone's psychology. They have launched fruit and vegetable washing machines. That claim to be able to efficiently remove pesticide residues. Is this expensive product as useful as it is advertised?
This machine on the market mainly purify food, disinfect and sterilize. Many dishwashers claim to have the function of washing fruits and vegetables. It can remove all harmful substances. Such as pesticide residues and heavy metals. It looks attractive.
To understand the effect of this machine. It is necessary to understand its working principle in detail.
Working Principle of Fruit and Vegetable Washing Machine
Nowadays, there are many kinds of fruit and vegetable washing machines. Their working principles mainly include the following two.
Ⅰ. Ultrasound
Ultrasound will cause cavitation inside the liquid when it is activated. The air dissolved in it is supersaturated due to negative pressure. When they escape from the liquid, they form tiny bubbles. These small bubbles will continue to move, oscillate, grow, shrink and burst with the vibration of the surrounding medium. They will produce local high temperature and high pressure and high-speed impulse flow. At the moment of rupture. The impact area is tiny. But it can still physically clean and disinfect fruits and vegetables. Under the combined action of many small bubbles,
In the case where the ultrasonic power is 1 kilowatt. It only takes 15 minutes to achieve a good effect of removing pesticides. But the surface of fruits and vegetables will be damaged.
Ⅱ. Ozone
1. Ozone is a light blue gas with strong oxidizing properties. It is often used for sterilization, prevention of mildew, and deodorization. It is widely used in production and life.
2. Ozone can chemically react with pesticides. Such as organic phosphorus or carbamate in fruits and vegetables. The residue is removed by chemical methods.
3. It takes a certain amount of time for the chemical reaction to occur. The longer the treatment time, the better the degradation effect.
After testing, after 30 minutes of processing, the degradation rate of pesticides can reach more than 50%. It has a certain effect. But it is far less effective than ultrasonic treatment.
We can combine other cleaning methods with the cleaning methods of fruit and vegetable washing machines. In this way, the best cleaning effect can be achieved.
