Value-Added Products from Coffee Waste: A Review

Abstract

Coffee waste is often viewed as a problem, but it can be converted into value-added products if managed with clean technologies and long-term waste management strategies. Several compounds, including lipids, lignin, cellulose and hemicelluloses, tannins, antioxidants, caffeine, polyphenols, carotenoids, flavonoids, and biofuel can be extracted or produced through recycling, recovery, or energy valorization. In this review, we will discuss the potential uses of by-products generated from the waste derived from coffee production, including coffee leaves and flowers from cultivation; coffee pulps, husks, and silverskin from coffee processing; and spent coffee grounds (SCGs) from post-consumption. The full utilization of these coffee by-products can be achieved by establishing suitable infrastructure and building networks between scientists, business organizations, and policymakers, thus reducing the economic and environmental burdens of coffee processing in a sustainable manner.

White & grey biotechnologies for shaping a sustainable future

“…About 10 million tons of coffee waste per year are reported to be produced globally. 197 Nearly, 0.6 ton per ton of coffee produced is spent coffee grounds (SCGs); this is the waste generated during brewing and manufacturing instant coffee. This is approximately estimated at 6 million tons per year.…”

“…It has been reported to be useful in producing biofuels (bioethanol, biodiesel, hydrogen and biogas), biomaterials such as polyhydroxyalkanoates and many bioactive compounds. 197 So, SCG is worth mentioning in the context of waste valorization and the circular economy. Here, we will discuss further only its use in enzymatic production of biodiesel.…”

Data on chemical composition of coffee husks and lignin microparticles as their extracted product

“…The biomass can be directly utilized as biomass fuel, organic fertilizer, animal feed, and substrate for mushroom cultivation [3] . Moreover, coffee husks can become a potential raw material for the production of bio-based materials, biofuels, and other value-added products [ 4 , 5 ]. To completely comprehend the features of this resource for future valorization, it is imperative to conduct an analysis of its chemical composition.…”

Evaluation of the Effects of Instant Cascara Beverage on the Brain-Gut Axis of Healthy Male and Female Rats

“…Coffee cherry pulp is amongst the main and first by-products generated in the coffee cherry processing. During the last years, an important effort has been made to produce different products from it because of its rich nutrient content and health-promoting properties [ 2 , 3 ]. In 2022, it was approved for its commercialization in the European Union [ 4 ].…”