It depends on where you live. Most European countries have a landfill ban. In this case you can simply put it into the household trash. In general, it is not a good idea to put it into the recycling cycle (gelber Sack, Wertstofftonne, Grüner Punkt). It may get blown away and eventually end up in the waterways.
In Germany household waste is incinerated to generate electricity and does not end up in landfills. The fumes are in fact being filtered and are 99% non-toxic.