Beijing tap water to increase chlorine injection? Watch out for these new crown rumors!

category:Global
 Beijing tap water to increase chlorine injection? Watch out for these new crown rumors!


The monthly science rumor list was jointly released by the Beijing Science and Technology Association, the Beijing Network Information Office, and the capital Internet association, and jointly released by the Beijing Science and technology Journalists Association and the Beijing regional website anti rumor platform. It was obtained from the science and technology communication professional committee of the Chinese Popular Science Writers Association, the science and technology Editors Association of China evening news, the Shanghai Science and Technology Communication Association, and Beijing Science and technology information Support from the Institute.

1. During the epidemic period, the amount of chlorine gas injected into Beijing tap water has been increased

Rumor:

During the emergency period of the epidemic, chlorine gas injection was increased in the allowable range during the treatment of tap water. When using water, especially before boiling water and cooking water, please take out the water in advance and let it stand for at least two hours before reuse.

ruth:

According to the national sanitary standard of drinking water, the residual chlorine in tap water should be kept between 0.3-4 mg / L. At present, the residual chlorine in the effluent water of each Waterworks of Beijing water group is controlled within the range of 0.4-0.9 mg / L, which is within the scope of national standards.

It is normal for tap water to have a slight chlorine smell, which does not affect health at all, and does not need to be kept for at least two hours for reuse. The tap water produced by Beijing Waterworks Group fully meets the national sanitary standard for drinking water, so the public can drink it at ease.

2. salmon has novel coronavirus infection and is not edible.

Rumor:

The novel coronavirus pneumonia case was novel coronavirus in Beijing again. The main reason is that salmon has been infected with a new coronavirus by testing. So salmon is no longer available.

ruth:

According to the current research, the possibility of fish infected with new coronavirus is very low. First of all, NCV mainly survives in thermophilic mammals, while fish are thermophilic animals. The genetic environment of the two cells is too far, so it is very difficult for the virus to transfer to human cells through the cells of fish host; secondly, the main transmission modes of NCV are droplet transmission and contact transmission, while salmon, as a kind of fish, has no lung and no physiological conditions for droplet transmission u3002

The carrying of coronavirus in salmon is different from that of bat. The carrying of salmon is, to be exact, contaminated; and the carrying of bat is that it becomes the host of virus symbiosis. At present, all known hosts of coronavirus are mammals,

The possibility of carrying coronavirus in salmon is almost zero.

For the public, it is recommended that we do not eat raw fish fillets, semi cooked steak and other foods that have not been fully sterilized for the time being. Vegetables and meat must be cooked and eaten. The new coronavirus is afraid of high temperature and will be killed in 30 minutes at 56 u2103. Avoid mixing raw and cooked food, cooked food is the best way.

3. The new coronavirus can survive for 20 years

Rumor:

Academician Li Lanjuan said: the new coronavirus is particularly not afraid of cold. It can survive for several months at minus 4 degrees and 20 years at minus 20 degrees. This is why the new coronavirus has been found several times in seafood markets with more refrigerated food, because the virus can be transported across countries.

ruth:

On June 20, Academician Li Lanjuans team responded to the report: the information in the report was not completely accurate, which was inconsistent with Academician Li Lanjuans own views, and caused great misunderstanding to the public.

On June 19, Academician Li Lanjuan gave suggestions and opinions on how the customs should strengthen the screening of new coronavirus in the quarantine and testing of import and export materials at the exchange meeting on anti epidemic experience held by Hangzhou Customs. When it comes to epidemic prevention and control in the cold chain transportation link, Academician Li said: generally, viruses can survive for a long time on the cold chain. Among the viruses known and mastered by us, the virus can survive for more than 3-6 months at about 4 u2103 and long-term survival for 20 years below - 20 u2103. Different viruses have different survival times. The new coronavirus is a new virus. It is only 8 months since it appeared. Its understanding and low temperature tolerance need further study.

4. New coronavirus can be transmitted during the production of potato chips

Rumor:

A novel coronavirus pneumonia case was reported in a potato producing area of a food company. This means that the potato chips produced in the factory can spread the new crown virus. Potato chips are not safe. The public should not eat potato chips in the near future.

ruth:

Although some employees in the factories affected by the epidemic were infected with the new coronavirus, they could ensure the safety of potato chips. The product processing process must go through high temperature heat treatment process. Combined with strict GMP management system and practice, the possibility of virus survival in the whole product supply chain process is zero.

(function(){( window.slotbydup=window .slotbydup||[]).push({id:u6056789,container:ssp_ 6056789, async:true }High temperature processing is an important way to kill microorganisms in food production. Even if potatoes and other raw materials are contaminated with a small amount of virus, it is difficult to survive after high temperature processing. Generally speaking, the processing temperature of fried food is about 170 u2103, and that of non fried puffed food is about 130 u2103. At this temperature, it is difficult for ordinary microorganisms to survive. The automatic food production and packaging line without contact can also basically avoid food contamination in these links. Although it is difficult for packaged food to be contaminated by virus in the production and packaging and other front-end links, there is a possibility that the outer packaging of food is contaminated by virus in the later stage of transportation, supermarket sales and delivery by express delivery personnel. Therefore, when shopping or signing for express delivery, the public should do scientific protection to avoid being infected by virus. Extended reading of symptoms of multiple isolated persons not reporting Beijing Disease Control and prevention important reminder: 7 cases diagnosed in Beijing, the youngest 27 years old and the oldest 70 years old, involving these communities and hospitals, the newly diagnosed 7 cases in Beijing are all centralized isolation personnel and related to the new place of occurrence. Source: Beijing Daily editor in charge: Ji Ke_ b6492

High temperature processing is an important way to kill microorganisms in food production. Even if potatoes and other raw materials are contaminated with a small amount of virus, it is difficult to survive after high temperature processing.

Generally speaking, the processing temperature of fried food is about 170 u2103, and that of non fried puffed food is about 130 u2103. At this temperature, it is difficult for ordinary microorganisms to survive. The automatic food production and packaging line without contact can also basically avoid food contamination in these links.

Although it is difficult for packaged food to be contaminated by virus in the production and packaging and other front-end links, there is a possibility that the outer packaging of food is contaminated by virus in the later stage of transportation, supermarket sales and delivery by express delivery personnel. Therefore, when shopping or signing for express delivery, the public should do scientific protection to avoid being infected by virus.