Of course it depends on the volume you have to dispose of, but besides shredding there are also hydraulic "punchers", like: https://www.youtube.com/watch?v=shi

Of course it depends on the volume you have to dispose of, but besides shredding there are also hydraulic "punchers", like: https://www.youtube.com/watch?v=shiRKLw5qVI https://www.youtube.com/watch?v=shiRKLw5qVI Hint: any hydraulic press would do, albeit a tad bit slower.