State of the art in coffee processing by-products

Alves, Rita C.; Rodrigues, Francisca; Nunes, M. Antónia; Vinha, Ana F.; Oliveira, M. Beatriz P.P.

doi:10.1016/b978-0-12-811290-8.00001-3

Cited by 96 publications

(134 citation statements)

References 68 publications

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“…The freshly harvested cherries are spread evenly and dried for 2–4 weeks under the sun until moisture is below 12%. Then, the cherries are mechanically de-husked and the skin, pulp, mucilage, parchment and part of the silverskin ( Figure 1 ) are removed from the beans ( Figure 2 ) [ 3 , 4 ]. Coffee cascara obtained from the dry method comprises nearly 45% of the coffee cherry [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…In Colombia, one of the first producers of Arabica coffee [ 6 ], in 100 kg of mature coffee cherries, 39 kg corresponds to skin and pulp [ 7 ]. Then, the mucilage is eliminated by fermentation for 24 to 72 h [ 3 ] and from 100 kg of fresh coffee cherries, 22 kg of mucilage is generated [ 7 ]. Next, the bean covered by the parchment is washed, drained and dried until moisture reaches around 10% [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

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Applications of Compounds from Coffee Processing By-Products

Iriondo‐DeHond

Iriondo-DeHond²,

Castillo

2020

Biomolecules

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To obtain the coffee beverage, approximately 90% of the edible parts of the coffee cherry are discarded as agricultural waste or by-products (cascara or husk, parchment, mucilage, silverskin and spent coffee grounds). These by-products are a potential source of nutrients and non-nutrient health-promoting compounds, which can be used as a whole ingredient or as an enriched extract of a specific compound. The chemical composition of by-products also determines food safety of the novel ingredients. To ensure the food safety of coffee by-products to be used as novel ingredients for the general consumer population, pesticides, mycotoxins, acrylamide and gluten must be analyzed. According with the priorities proposed by the Food Agriculture Organization of the United Nations (FAO) to maximize the benefit for the environment, society and economy, food waste generation should be avoided in the first place. In this context, the valorization of food waste can be carried out through an integrated bio-refinery approach to produce nutrients and bioactive molecules for pharmaceutical, cosmetic, food and non-food applications. The present research is an updated literature review of the definition of coffee by-products, their composition, safety and those food applications which have been proposed or made commercially available to date based on their chemical composition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applications of Compounds from Coffee Processing By-Products

Iriondo‐DeHond

Iriondo-DeHond²,

Castillo

2020

Biomolecules

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“…Coffee silverskin (CS) is a thin tegument that directly covers the coffee seed. During the roasting process, coffee beans expand and this thin layer is detached, becoming the main by-product of coffee roasting industries [1]. CS, compared to other coffee by-products, is a relatively stable product due to its lower moisture content (5-7%) [2,3].…”

Section: Introductionmentioning

confidence: 99%

Coffee Silverskin: A Review on Potential Cosmetic Applications

2018

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Coffee silverskin, the major coffee-roasting by-product, is currently used as fuel and for soil fertilization. However, there are several studies reporting silverskin as a good source of bioactive compounds that can be extracted and further used by cosmetic industry. Its high antioxidant potential may be due to the synergistic interaction of chlorogenic acids (1-6%), caffeine (0.8-1.25%), and melanoidins (17-23%), among other antioxidant compounds. The bioactive compounds of silverskin can answer to the new fields of cosmetic industry on natural active ingredient resources that improve health skin appearance, counteract skin aging and related diseases, in an environmentally friendly approach. Skin aging is a complex process associated with oxidative metabolism and reactive oxygen species (ROS) generation. ROS production increase matrix metalloproteinases (MMPs), as well as pro-inflammatory mediators, resulting in consequent skin damage and aging. To counteract this process, cosmetic industry is looking for compounds able to increase MMP inhibitory activities, hyaluronidase inhibitory activity, expression of collagen and elastase inhibitory activity, as potential bioactive ingredients with anti-aging purposes. This review focuses on skin aging factors and the potential anti-aging, anti-inflammatory, antimicrobial, anti-cellulite and anti-hair loss activity, as well as protection against UV damage, of coffee silverskin and their bioactive compounds.

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“…ln q e = ln K f + n ln C e (5) where K f (mg/g) is related to adsorption affinity, and 1/n is the heterogeneity factor related to the intensity of the adsorption. Batch experiments on the adsorption of binary and ternary aqueous metal cation species in mixtures were carried out using the same initial total molar amount of cations.…”

Section: Methodsmentioning

confidence: 99%

“…CS is a thin integument of the outer layer of green coffee beans that comes off during the roasting process [5]. Moreover, it is generally produced in high volumes, takes fire very easily, and its disposal requires the use of energy for the necessary compaction process.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Exploitation of Coffee Silverskin in Water Remediation

et al. 2018

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Coffee silverskin (CS), the main solid waste produced from the coffee industry, has efficiently been used as adsorbent material to remove potential toxic metals (PTMs). In order to assess its suitability in water remediation, kinetic adsorption experiments of Cu2+, Zn2+, and Ni2+ ions from wastewater were carried out and the adsorption performance of the waste material was compared with that of another well-known waste from coffee industry, spent coffee grounds (SCG). By using CS as sorbent material, ion removal follows the order Cu2+ > Zn2+ > Ni2+ with the adsorption equilibrium occurring after about 20 min. The adsorption efficiency of Ni2+ ions is the same for both investigated materials, while Cu2+ and Zn2+ ions are removed to a lesser extent by using CS. Equilibrium-adsorption data were analyzed using two different isotherm models (Langmuir and Freundlich), demonstrating that monolayer-type adsorption occurs on both CS and SCG surfaces. The overall results support the use of coffee silverskin as a new inexpensive adsorbent material for PTMs from wastewater.

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State of the art in coffee processing by-products

Cited by 96 publications

References 68 publications

Applications of Compounds from Coffee Processing By-Products

Applications of Compounds from Coffee Processing By-Products

Coffee Silverskin: A Review on Potential Cosmetic Applications

Sustainable Exploitation of Coffee Silverskin in Water Remediation

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