Where does the waste go on a train?

The waste goes to the sewer. From there it is sent to places where they treat it using three steps. Then they send most of it back to be reused in toilets and sprinklers, or release it into rivers

Most of the waste that households produce will end up in a land fill. Most of the organic waste is usually piled in layers in the hopes that it decomposes and breaks down into humus.