When the need actually arises to dispose of a kitchen knife, the protection of anyone who may or must come into contact with the waste is, of course, paramount. If the handle and blade are made of different materials, they should be separated before final disposal.
Dispose of in household waste
If a kitchen knife is to be disposed of in household trash, the blade must be securely wrapped. If the handle is made of wood or plastic, separating it from the blade is recommended. Since it is trash, the handle can also be destroyed with relatively brute force, such as a hammer.
The blade must be packed in such a way that no one who grabs it out of ignorance or accident can injure themselves on it. Ideally, padding is used that is sealed without risk of self-opening, even in the presence of moisture. The blade can be wrapped in a large plastic bag several times, and the padded package is then wrapped with tear-resistant tape several times in all directions. Bubble wrap in a sleeve or envelope also serves this function.
The package should be placed in the center of a trash receptacle, if possible, and ideally surrounded by as much other protective trash as possible. When disposing of the package, homeless people, animals or children rooting around in the trash must also be considered as possible risk groups.
Further use and reuse options
The blade of a kitchen knife is always made of metal and can therefore be handed in at scrap and metal dealers. Since even rather dilapidated kitchen knives can be used again after refurbishment, social department stores or most flea market dealers are happy to receive the small gift.
In your own household, other uses for an old discarded kitchen knife are conceivable. The old blades can be put into plant boxes or flower beds and the handle used as a growing and climbing aid. Old kitchen knives are also useful for turning and aerating planting soil.
As a crude auxiliary tool, depending on handle material and handle length, an old kitchen knife can also serve as a charcoal stick for the grill, a grout scraper for patio and garden slabs, or a stirring tool for paints and varnishes.