Dry (fumigation) and wet disinfection
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Eggs can be disinfected using dry methods such as gas. Fumigation with gas is the preferred method because gas penetrates deeper into the pores and does not form droplets. A very fine mist or fog is another common method of disinfection. This is a wet disinfection technique. Avoid droplets forming. It is important to avoid any movement or flow of air, as this can cause droplets to form in the mist. Wet disinfection using a mist can also be done in combination with evaporation (with low heating) to prevent droplet formation.
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What are the risks of wet disinfection?
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The risk of wet disinfection is that the product can wet the egg. This occurs when the droplets are too large and deposit on the surface of the eggs. The egg then cools quickly and sucks the disinfectant through the pores. Use the correct nozzles and correct pressure and regularly check that nozzles are adjusted correctly. Apply a fixed disinfection program, adjusted to suit the installation (including ventilation) and use sufficient disinfection fluid.
A simple method of dry formalin disinfection, where formalin crystals are heated in a pan. 7 g/m3 is sufficient for effective disinfection. Formalin added to potassium permanganate is also used. Wet disinfection using mist.
The spray nozzles should create a very fine mist. Large droplets that wet the eggs will block the pores on the eggshell.
6. E gg t r a n sp o r t a n d s to rag e
Fumigation (dry disinfection) installation.
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