Veolia aims to create £1m a year from precious metals found in street sweepings.
The French-owned waste firm, which has deals to sweep streets in 40 UK towns and cities, has identified bounties of palladium, platinum and rhodium in the collected waste.
MRW reported in 2011 that Veolia was trialling a process of extracting the precious metals via a washing plant in Warwickshire.
Now the company has plans for two more facilities, and is in the process of carrying out laboratory analysis of the fine dust left after large contaminants are removed from sweepings.
It hopes to work in partnership to refine the metals, and estimates this could generate £1m per year.