At present, in many colleges and un

At present, in many colleges and universities in our country, the use mode of many books are one-time purchase, one-time use, that is, the book users only use one quarter, one semester or one year after purchase. This use mode greatly shortens the life of books. In recent years, in many colleges and universities, a large number of books will become idle books and be eliminated every semester, and then be directly replaced As waste disposal, these idle books mainly come from the collection of school library, colleges and reference rooms, old teaching books of staff, etc. because of their wide sources, these idle books involve many disciplines and language classifications, which can be said to be a very valuable book resource. If they are directly disposed of as waste, it is obvious that there is no waste Making full use of book resources, at the same time, from reducing energy consumption, reducing waste water and waste gas emissions, to achieve green environmental protection, does not conform to the current social environmental protection and conservation needs.