Does bleach have a bactericidal effect?

Yes, but bleaching powder is also toxic, what disinfection and sterilization is best not to use it.

Most bleach is available.

Bleaching powder is a more commonly used disinfection drug in aquaculture, the main component of bleaching powder is calcium hypochlorite, its disinfection is mainly to use the chlorine contained in it to work, the effective chlorine content of bleaching powder is 30-38%, so bleaching powder is often used for pond water disinfection. So in the process of shrimp farming, how to disinfect the shrimp pond with bleaching powder?

In fact, for this problem, we also depend on the situation, if it is used for pond cleaning and disinfection before breeding, the amount will usually be larger, if there is no water in the pond, you can use the amount of 8-10 kg per mu. When using, the bleaching powder can be evenly sprinkled on the fish pond and the slope around the fish pond, which can effectively kill the pathogens inside.

If there is water in the pond, then use bleach powder to disinfect the fish pond, which is called disinfection with water, which has the advantage of being more thorough and disinfecting the water body at the same time, so many friends like to use this method to disinfect. If it is disinfected with water, the usual dosage is about 20 grams of bleaching powder per square of water, we can add bleaching powder to the whole pool after splashing evenly, if there is an aerator in the pond, you can turn on the aerator for a while after the medication, so that the medicine in the water can be stirred more evenly to promote the effect of disinfection.

At the same time, bleaching powder can also be used to disinfect water and shrimp in the breeding process, which can play a role in preventing and improving some diseases, especially some bacterial diseases. In this case, we commonly use the amount of 1-3 grams of water per square meter to sprinkle the whole pool evenly, and the specific amount is determined according to the size of the shrimp and the state of the shrimp, water quality and disease conditions. In addition, for large-water aquaculture, some farmers also like to put this drug in a cloth bag and put it at the shrimp food or water inlet to disinfect the water body and shrimp, which has a certain effect on preventing shrimp diseases.

Netizen 2: Le Youyou LQ

Shrimp pond disinfection now do not need bleaching powder, bleaching powder will produce very low by-products, now use chlorine dioxide disinfectant, in aquaculture can reduce the number of pathogenic microorganisms in the water, without damaging plankton, disinfection of water bodies, oxygenation, hemorrhagic septicemia of fish, rotten gills, red skin, enteritis, water mildew and shrimp vibriosis, viral diseases, bacterial diseases of river crabs, etc.

First, the use of bleaching powder, bleaching powder in aquaculture, mainly used in fish pond disinfection and prevention, bacterial fish disease.

1) Cleaning pond disinfection. The general application rate is 20-30 grams per cubic meter of water. The bleaching powder is dissolved in water first, and then the whole pool is sprinkled, which can kill aquatic insects, frog eggs, pests, snails and various fish disease pathogens in the water body.

2) Prevention and control of diseases. The use of bleaching powder to prevent and control fish diseases, in the occurrence of fish diseases or epidemic season, generally per cubic meter of water with 1-3 grams of drugs, add water to dissolve the whole pool splashing, 1 time every other day, 2 times in a row, can ** fish gill rot, white skin disease, white head and white mouth disease, erect scale disease, enteritis disease, etc. Whether the bleaching powder is used for pond cleaning or fish disease, it meets the requirements of ecological aquaculture and pollution-free aquaculture of aquatic products.

Second, the application method of bleaching powder.

1) Quantitative method of sampling measurement. The available chlorine content of the bleaching powder must be sampled prior to application in order to determine the amount to be used. To determine the available chlorine content of bleaching powder, blue-black ink titration can be used.

In terms of prevention and control of fish diseases, the effective chlorine content of bleaching powder is required to reach 30%, and the dosage of each cubic meter of water is generally 1-2 grams.

2) Dissolution filtration and spilling method. When using bleaching powder to prevent and control fish diseases, regardless of the size of the pond and the amount of medicine, when applying, it must be dissolved with water first, filter out the residue, and then sprinkle the whole pond to prevent fish from swallowing bleaching powder by mistake and causing dead fish.

3) Administered to the course of treatment. The use of bleaching powder to prevent and control fish diseases must adhere to the course of application. Generally, 1 course of treatment is 3-5 days, that is, after applying bleaching powder on the first day, the second application is used at an interval of 1 day, and 2-3 times are applied continuously.

4) Regulate the application of water quality.

Generally, the application effect is good when the clear water pond or pond water is neutral or slightly alkaline. Therefore, before applying bleaching powder to prevent and control fish diseases, the water quality can be adjusted with 10-15 kg of quicklime with a water depth of 1 meter per mu, and then bleaching powder can be applied.

3. How to use:

Disinfection of fish ponds is generally carried out after the fish are picked up and before the next fingerlings are stocked.

The empty pool is filled with water, cleaned and disinfected with bleaching powder, and the dosage of more than 20 grams per square meter (kilograms per mu) is evenly sprinkled into the pool. 1 After 2 days, let the pool water out. In order to promote the oxidation of the soil and mud at the bottom of the pool, the bottom of the pond is raked and exposed to the sun for about a week.

To prevent and control fish red skin, rotten gills and other diseases, soak 10ppm bleaching powder at a water temperature of 10-15 for 20 30 minutes, and soak for 15 20 minutes at a water temperature of 15 20 minutes. **Whitehead and white mouth, leukoderma and prevention and treatment of enteritis, sprinkle the whole pool with 1ppm bleaching powder.

Hello No, bleaching powder is a chemical substance, sprinkled into the soil, it is a chemical contaminant, which is harmful to the human body. So, you can't scatter the fields, I hope the above can help you, I wish you a happy life.

Questions. Thank you.

You're welcome.

Drinking water is generally disinfected with chlorine dioxide bleach, which is not harmful. Chlorine dioxide has been widely used in developed countries around the world. The World Health Organization (WHO) and the World Food Organization (FAO) have also classified chlorine dioxide as an A1 safe and effective disinfectant.

In order to control the production of "three substances" (carcinogenic, teratogenic and mutagenic) in drinking water, developed countries in Europe and the United States have widely used chlorine dioxide instead of chlorine for disinfection of drinking water.

Around 2006, China also began to pay attention to the promotion and application of chlorine dioxide products. On June 1, 2006, the National Standard of the People's Republic of China for Stable Chlorine Dioxide Solution (GB T20783 2006) was promulgated, and the Ministry of Health of the People's Republic of China has approved chlorine dioxide as a disinfectant and a new food additive.

The purification and sterilization process of tap water in China is mainly completed by applying chlorine (turning on the faucet and smelling the smell of bleaching powder is excess chlorine). In fact, chlorine itself is a toxic substance, it can kill bacteria, but it can also kill human life, chlorine can react with organic matter in water (putrescine) to produce organic compounds - trihalomethane, which is recognized as a strong carcinogen in the world, and now foreign countries call this water disinfected with chlorine gas "carcinogenic water". At present, the internationally recognized ideal bactericidal substance is ozone, the sterilization effect is nearly 1,000 times that of chlorine, but its sterilization staying power is difficult to grasp, the cost is expensive, in addition to some developed countries in Europe, the United States and China, most countries are still disinfected with chlorine.

Chlorine sterilization can also cause cancer. Chlorine is dissolved in water to generate hydrochloric acid and hypochlorous acid, of which hypochlorous acid is a strong oxidizing acid, which has the effect of oxidative disinfection and oxidative bleaching, and the primary ecological oxygen O generated by hypochlorous acid decomposition has strong oxidation and can be disinfected. The way to get rid of the smell of bleach is to boil the water when it is boiling, open the lid and boil for 2-3 minutes.

Be careful not to get burned by water vapor, though.

Generally, there is no problem.

There are hazards. A small dose will be fine, and a large dose will be harmful.

Tap water is supposed to be a convenient and safe drinking water, but chlorine is added to the treated water to inhibit bacteria in the water. Chlorine is still used in more than 80% of the world's water plants as an effective means of sterilization and disinfection.

Therefore, a certain amount of residual chlorine must be maintained in municipal tap water to ensure the safety of the microbiological indicators of drinking water. However, when chlorine reacts with organic acids, many carcinogenic by-products are produced, such as trihalomethanes. More than a certain amount of chlorine itself will also cause many harms to the human body, and with an unpleasant smell, commonly known as "bleaching powder smell".

Now, most experts agree that the use of chlorinated water and the presence of chloride in drinking water do have a certain relationship with the risk of cancer.

The main function of bleach is to improve the color of the article, inhibit the growth of bacteria, and gradually fade the pigment on the surface of the article through chemical reaction, so that the oxidase activity of the article is reduced. At present, there are two types of bleaching agents on the market, oxidizing and reduced, among which salt bleach is suitable for bleaching white clothes, and acid bleach is suitable for bleaching clothes with more colors.

The main function of bleach is to improve the color of the article and inhibit the growth of bacteria, its principle of eggplant is to destroy the activity of oxidase in the article through chemical action, reduce the oxygen consumed by the article, so that the surface pigment of the article gradually fades, and the article can be stored for a longer time.

At present, the oxidants on the market are divided into oxidation type and reduced type, among which the oxidation type is divided into salt and acid bleaching agents, and the bleaching effect of salt bleach is very strong, which is more suitable for bleaching white clothes. Acid bleaching agents are relatively mild and suitable for bleaching clothes with more colors.

However, no matter what kind of bleach is used to wash clothes, it is recommended to wear masks, aprons, gloves and other protective equipment between use to avoid damage to the human body during the use of bleach, because bleach contains certain corrosive substances and will emit a pungent smell.

The role of bleach: improve the color of food and inhibit bacteria. Improve the color of food:

Bleach consumes oxygen in food through chemical actions such as reduction, destroys and inhibits the activity of food oxidase and the color development factors of food, so that the food browning pigment fades or is free from browning, and also has a certain antiseptic effect. Antibacterial effect: It is widely used in food processing, and oxidative bleach has few practical applications except for a few varieties such as benzoyl peroxide as a flour treatment agent.

The role of bleach: improve the color of food and inhibit bacteria.

1. Bleach can improve the color of food: bleach consumes oxygen in food through chemical actions such as reduction, destroys and inhibits the activity of food oxidase and the color factors of food, so that the food browning pigment fades or is exempt from browning, and also has a certain antiseptic effect. There are 7 kinds of bleaching agents allowed to be used in China, such as sulfur dioxide, sodium sulfite, and sulfur, of which sulfur is limited to the fumigation of candied fruit, dried fruits, dried vegetables, vermicelli, and sugar.

2. It has antibacterial effect: it is widely used in food processing, and oxidative bleach has few practical applications except for a few varieties such as benzoyl peroxide as a flour treatment agent. As for hydrogen peroxide, it is only allowed to be used in some areas for raw milk preservation and bagged dried tofu, and is not used as an oxidative bleaching agent.

If white clothes are dirty, you can use bleach to clean them. So what does bleach do? PChouse will take you to find out.

The function of bleach is to decontaminate, sterilize, mildew, deodorant, bleaching, in addition, the strong oxidation effect of bleaching can destroy bacteria and virus cells, and play a role in sterilization and bleaching. It can quickly kill common pathogenic bacteria such as Escherichia coli, Staphylococcus aureus, Bacillus subtilis black variant tooth cell and hepatitis B virus, block the invasion of infectious diseases caused by bacteria and viruses such as typhoid, influenza, encephalopathy, tuberculosis, red eye, syphilis, gonorrhea, hepatitis and other infectious diseases, and is suitable for stains, sterilization and bleaching of items in families, hotels, restaurants, hospitals and other places.

The role of bleach: improve the color of food and inhibit bacteria. To improve the color of food, bleach consumes oxygen in food through chemical action such as reduction, destroys and inhibits the activity of food oxidase and the color factor of food, so that the food browning pigment fades or is free from browning, and also has a certain antiseptic effect.

Improper use of water bleaching will damage the color and fibers of clothing, so be sure to dilute it before use. Add water to the basin or other containers first, and then pour an appropriate amount of bleaching solution in the prescribed proportion and mix evenly, and then put it into clothes and other items for bleaching.