| Cassidy did indeed go ahead, modifying the draff with a secret ingredient, transforming it into a cleansing agent. |
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| Then we finally knock the spigot off the cooling tank and, after filtering, the old draff can be seeded back in the fermentation tank. |
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| During that procedure, we take all the rest of the sugars out of the draff to raise the output. |
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| Second, as the spent grain or draff can vary in moisture content, the time needed to empty a lauter or mash tun can vary dramatically. |
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| Any deferral decision made at a donor site would be based on donor self-identification and self-report, the draff guidance noted. |
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| A hatch? To send the sodden malt draff direct to a nearby cowshed? |
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| Celtic Renewables, a spin-out company from the Biofuel Research Centre at Edinburgh Napier University, is also testing its process to turn draff into biobutanol, a biofuel to power transport vehicles. |
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| Cassidy, who was working on her Phd, thought draff, the residue of barley husks that is a byproduct of using grain in brewing alcohol products such as whisky, would act as a cleansing agent. |
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| Instead of using draff in Bangladesh, Dram will use local ingredients such as coconut shells or rice husks to act as the organic filter media that traps the arsenic. |
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