Hi,
There are a few different ways to recycle your used toner cartridge, however this is not a service we offer ourselves.
You can check out our recycling page to find out more information:
https://www.tonergiant.co.uk/recycling/This provides you with third party companies who offer a recycling service. Another option is to recycle the product with the manufacturer themselves. Brother do accept old cartridges back and you can find the link on our recycling page above.
I hope this helps and if you need any further information, please feel free to respond.