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Review
. 2023 Apr 18;28(8):3562.
doi: 10.3390/molecules28083562.

Value-Added Products from Coffee Waste: A Review

Yoon-Gyo Lee  1 , Eun-Jin Cho  1 , Shila Maskey  1 , Dinh-Truong Nguyen  2 , Hyeun-Jong Bae  1   3
Affiliations
Review

Value-Added Products from Coffee Waste: A Review

Yoon-Gyo Lee et al. Molecules. .

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.

Keywords: bio-oils; bio-sugars; bioactive compounds; biopolymer; coffee waste; organic acids; spent coffee grounds; value-added products.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
By-products generated during wet and dry processing of coffee.
Figure 2
Figure 2
Existing and proposed value-added products throughout the coffee life cycle.
Figure 3
Figure 3
Schematic diagram for the production of biosugars and bioethanol from spent coffee grounds (SCGs) and the economic point-of-view [29].
See this image and copyright information in PMC

References

    1. Capanoglu E., Nemli E., Tomas-Barberan F. Novel approaches in the valorization of agricultural wastes and their applications. J. Agric. Food Chem. 2022;70:6787–6804. doi: 10.1021/acs.jafc.1c07104. - DOI - PMC - PubMed
    1. Murthy P.S., Madhava Naidu M. Sustainable management of coffee industry by-products and value addition—A review. Resour. Conserv. Recycl. 2012;66:45–58. doi: 10.1016/j.resconrec.2012.06.005. - DOI
    1. Catalán E., Komilis D., Sánchez A. Environmental impact of cellulase production from coffee husks by solid-state fermentation: A life-cycle assessment. J. Clean. Prod. 2019;233:954–962. doi: 10.1016/j.jclepro.2019.06.100. - DOI
    1. Moreira M.D., Melo M.M., Coimbra J.M., Reis K.C.D., Schwan R.F., Silva C.F. Solid coffee waste as alternative to produce carotenoids with antioxidant and antimicrobial activities. Waste Manag. 2018;82:93–99. doi: 10.1016/j.wasman.2018.10.017. - DOI - PubMed
    1. Peshev D., Mitev D., Peeva L., Peev G. Valorization of spent coffee grounds–A new approach. Sep. Purif. Technol. 2018;192:271–277. doi: 10.1016/j.seppur.2017.10.021. - DOI