Inert waste
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Inert waste is waste that is stabilisated. It can't react in chemical, thermical or any other physical way. It Germany (for example) it is just allowed to disposal this kind of waste. You can produce this waste with incineration. It is the part of material which can't be burned, mainly minerals. Or you can use mechanical biological threadment plants. First the waste is sorted with mechanical systems, after that it is composte or fertilisated. The educt can't react in any point of view. The disadvantages of this waste are: 1. geological not saved 2. very expensive to produce