How to disinfect the second-hand house?

Why should second-hand houses be disinfected?

Most of the second-hand houses have been occupied, some have been occupied for a long time, and some even changed their owners, so there will be some germs in the room more or less. Many second-hand houses not only have germs and viruses, but also have many kinds and quantities. In particular, there are a large number of viruses in walls, ceilings, floors, doors and windows, as well as kitchens and bathrooms. Some of these germs and viruses can survive for many years. Therefore, tenants and renters who buy second-hand houses should thoroughly clean and disinfect the inside and outside of the house before moving in.

Disinfection method:

Disinfection of wall surface: 500- 1000 mg/L chlorine-containing disinfectant is sprayed on the ground from outside to inside, and then sprayed on the ground from inside to outside after indoor disinfection. Perform for 60 minutes. The liquid absorption capacity of cement wall, wood wall and lime wall is 100ml/m2, which shall not be exceeded during spraying. If you are afraid of corrosion and bleaching, cover it first.

Surface disinfection: Wipe it twice with 250-500mg/L available chlorine aqueous solution, and clean it with clean water after 3 minutes if necessary to prevent the articles from being damaged. Ground disinfection can also be wiped with 500- 1000 mg/L available chlorine aqueous solution.

Air disinfection: Physical disinfection method: A: Window ventilation. This is the first choice for air disinfection, which is safe and effective. B: Ultraviolet disinfection should reach 1.5w/m3 for more than 30 minutes. Chemical disinfection: peracetic acid fumigation disinfection method: the dosage of peracetic acid fumigation disinfection for indoor air and smooth surfaces is1g/m. During fumigation, the peracetic acid stock solution is diluted to about 5% aqueous solution with water, placed in a porcelain enamel basin (please be careful not to contact with metal), placed on an electric furnace with asbestos mesh, closed the doors and windows, turned on the power supply, and cut off the power supply when peracetic acid evaporates to tens of milliliters for 30 minutes. Just open the doors and windows. This method is the most stringent air disinfection method and is generally not suitable for use.

Precautions:

1. Disinfectant is corrosive and bleaching. Please use it carefully if there are valuables.

Please pay attention to personal protection and wear masks, hats, gloves and glasses when disinfecting.

3. The concentration calculation and proportion of disinfectant are complicated. If there is any ambiguity, please consult a professional disinfectant. 4, air disinfection, please choose to open the window for ventilation, peracetic acid air disinfection with caution, there are certain risks.