How to recycle:
Since the bristles are not compostable you have to remove the bristles and dispose of them separately from the toothbrush handle.
Simply snap of the head of the toothbrush. The head with the bristles goes in your normal trash bin.
The handle of your toothbrush is 100% biodegradable, and can be disposed in an industrial composter, where it will break down in a few weeks. Or just put it in your home composter if you have one.
Even if you just throw it into your normal rubbish and the toothbrush ends up in landfill, it will still biodegrade in a few years.