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Instant coffee
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===Byproducts=== The main byproduct of the instant coffee production process is spent coffee grounds. These grounds can be used as biomass, for example to produce heat used in the manufacturing process.<ref>{{cite web|url=http://www.madehow.com/Volume-3/Instant-Coffee.html|publisher=Madehow|title=Instant Coffee}}</ref> Roughly two times the mass in spent coffee grounds is generated for each quantity of soluble coffee.<ref>Pfluger, R. A. (1975). Soluble coffee processing. In C. L. Mantell (Ed.), Solid wastes: origin, collection, processing, and disposal. New York: Wiley.</ref>
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