First, remember that some manufacturers already have "it," the core of greenness. In the case of olive farming, there is am inferior product called "pomace" oil, which is really not very good for use in food, but still sold as such. It's sort of okay for soaps and cosmetics, though.
Now let's look at technology like this "dieso-robo-spenser" that's called Bio Bot for some reason. It's not a biological bot. It's not even a bot for biology. It's a bot that uses a chemical process to purify vegetable oil into cleaned diesel fuel.
We have quite a few "zencology" firms here in WA, they produce or manufacture all manner of things for the seriously eco conscious sustainable greenhouse gas emission and carbon footprint lowering business or grower. One business which actually manufactures a small plant to manufacture biodiesel appears not to have bothered to even advertise in that directory, luckily I emailed them ages ago and got not much from them actually, but I did retain their URL, which is http://www.bioworks.com.au/index.shtml .
Now olive growers are not the only people who produce a byproduct feedstock suitable right away for milling and pressing to fuel oil. Our lovely grape and wine industries produce anothe byproduct feedstock which is largely going to waste, grapeseed. Yes, I know, it is being pressed into grapeseed oil (which is HUGELY beneficial in The Body Friendly Zen Cookbook diet as an oily vitamin E - go read the book to find out why that's important) and sometimes even getting used as stock feed.
But after pressing out the food grade grapeseed oil, this too can be pressed for a lower grade oil, and the cake left over can still be used as stock feed.
So if our WA Bioworks type manufacturing businesses could be bothered to do something else besides manufacture diesel making plant and then wait for people to find out about them, they might find a huge market for a diesel-robo at each winery, olive farm, and many others - because if you could make your own, much cleaner, much cheaper, and local diesel fuel oil, why wouldn't you? Assume you have enough biomass (about 10 to 1 from solid to oil, and about 3 to 2 for oil to diesel) to produce the fuel your farm equipment uses for the season, you've probably saved yourself the cost of a few thousand litres of diesel per season, so for a medium farm maybe $5000AUD for the year. So it recoups costs in no time, Bioworks are happy because they've made plenty of sales, and the environment says thank you.
Oh and the byproducts - the spent feedcake of seeds and so forth, and the glycerine from diesel manufacture - they can all be re-used somewhere. Glycerine is in demand for soap production and cosmetics, and can also be broken down again by composting methods to become fertiliser, while spent feedcake can become compost or feed for herbivorous animals, be they yours or the neighbour's. You may even be able to trade feedstock for a nice bit of yearling lamb each season.
And THAT'S how to close the cycles!