Therefore, it is necessary to disinfect the returned books. In order to facilitate the timely circulation of returned books, the library should set up a small disinfection room, and install ultraviolet lamps indoors to disinfect the returned books on duty before putting them on the shelves to prevent them from becoming sources of infection. The library should also install ultraviolet lamps in the storage area of the stacks, controlled by special switches, and disinfect all the books in the storage area once a week, so as to prevent the dust adsorbed on the books from becoming a breeding ground for bacteria, thus avoiding the harm of bacteria to readers' health when books are lent out. High-concentration ozone sterilization and disinfection room There is a high-concentration ozone sterilization and disinfection room in Shanghai Library for the sterilization and disinfection of books and periodicals. The staff put the recycled books on a 45 cm wide shelf, pushed the disinfection room forward and started the electronic sterilizer. After 30 minutes, the red light flashes and the disinfection is over. This method can sterilize 2000 books at a time. There is a multifunctional book sterilizer in the market, which sterilizes books, files and textbooks like Shanghai Library. It consists of an electronic sterilizer and several special shelves for book disinfection. It can sterilize thousands of books at a time, which is very convenient and practical. It's much better than the book disinfection cabinet sold now. It seems to be produced by South Disinfection and Sterilization Equipment Factory.