The recycling of used cooking oils into biodiesel fuel has been a trend in onsite foodservice for a number of years, but a few programs are now taking that process a step further. They are using glycerin, a byproduct of biodiesel production from cooking oils, to make soap, as well as related products like shampoo, laundry detergent and surface cleaners. Either way, the process illustrates how green technologies can sometimes expand into unexpected areas to close waste cycles and ...

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