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So using low energy levels the team heated coffee waste to over 350 °C (around 660 °F) while depriving it of oxygen.
As an avid coffee drinker, I devoured this article with interest. Though I don’t think heating the waste to above 350 degree Celsius is particularly environmentally friendly. Still, good to know that there are possibilities other than relying on sand
It's incorrect that they would replace sand with coffee. That's dumb. It's the fly ash that they would replace. Sand is the finer aggregate that needs to fill the void between the larger aggregate of rocks.
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The study discusses using coffee to replace some of the sand. It would lower the amount of sand needed and that would be significant.