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What projects are out there will depend on what country you are in.
l believe it is being done - though by companies with access to large amounts of waste oil from major users so it maybe does not make the news.
At very small scale you can buy equipment to do this yourself, though you will still need access to old cooking oil in the scale of your fuel requirement and it is a messy business to get into, the process also requires some stock chemicals and a little trial and error unless you have a sophisticated conversion set-up.
Waste cooking oil can not easily be turned into bio-gas, it is the wrong base stock for that.