The landmark at its processing facility in West Thurrock, Essex means that the company is now processing over one fifth of all the tyres scrapped in the UK each year.
SER sales and marketing manager Ryan Mifflin said: Fifty million tyres represents a saving of more than three quarters of a million cubic metres of landfill space, enables tyre manufacturers to meet their producer responsibility obligations and provides tyre change depots with a sustainable disposal route.
Since the company was formed in 2001, we have invested more than £12 million in processing facilities in strategic UK conurbations and developed a national network of tyre collectors. We can now boast an exceptional service providing competitive gate fees, full legal compliance and EMAS and ISO14001 accreditation.
Year on year, our processing capacity has been steadily meeting the challenge to provide a long-term solution to the recovery and disposal of end of life tyres.
The news is a timely boost for a waste stream which caused many to panic when a ban on sending whole or shredded tyres to landfill came into effect on July 16 this year.
While the Wales Environment Trust suggested that the principality could be swamped by up to 26,000 used tyres, it now appears that the opposite could be true.
A recent report by researchers at Oakdene Hollins suggested that demand for waste tyres from companies such as SER could lead to a shortage next year.
It predicted that demand would rise from 472,000 tonnes this year to 538,000 tonnes in 2009.