Impacts of discarded coffee waste on human and environmental health

Fernandes, Andréia da Silva; Mello, F.V.C.; Filho, Sérgio Thode; Carpes, Raphael de Mello; Honório, J.G.; Marques, Mônica Regina da Costa; Felzenszwalb, Israel; Ferraz, Elisa Raquel Anastácio

doi:10.1016/j.ecoenv.2017.03.011

Cited by 89 publications

(40 citation statements)

References 52 publications

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“…Coffee has deoxygenation effects that could be harmful for aquatic environments (Fernandes et al, 2017). The total amount of caffeine added to the mesocosms was quantified in this study by the caffeine concentration in the spent coffee grounds prior to adding the coffee to the mesocosms.…”

Section: Caffeine Effectsmentioning

confidence: 99%

Nitrate Removal by Floating Treatment Wetlands Amended with Spent Coffee: A Mesocosm-Scale Evaluation

Keilhauer¹,

Messer²,

Mittelstet³

et al. 2019

Transactions of the ASABE

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HighlightsA floating treatment wetland design was evaluated for water quality improvements.Nitrate-N removal rates were quantified using spent coffee grounds as a carbon source.Nitrate-N removal rates increased throughout the growing season Abstract. The Midwestern U.S. is vulnerable to eutrophic conditions from high nutrient concentrations. Floating treatment wetlands (FTWs) are an innovative wetland design for nutrient removal from nonpoint sources and provide a unique treatment. The objectives of this project were to quantify nitrate removal in traditional and carbon-amended FTWs planted with Midwestern plant species during the establishment year. Three greenhouse experiments were conducted throughout the growing season using 18 mesocosms. Two vegetation designs were evaluated: rush species ( and ) and diverse species (, , , , , and ). Spent coffee grounds were applied to 9 of the 18 mesocosms as a carbon amendment. Nitrate-N removal increased during the establishment growing season in the FTW systems (Spring: 15.0% to 17.3%, Summer 1: 82.8% to 92.6%, Summer 2: 86.4% to 94.7%). Nitrate-N removal was also impacted by carbon amendments (FTW without amendment: 82.8% to 94.7%, FTW with amendment: 88.4% to 96.1%). Carbon additions were found to enhance denitrifying conditions even in the absence of FTWs (decreased dissolved oxygen, increased available organic carbon). Significant differences in nitrate-N removal were not observed between FTW vegetation designs. This study provides new insight on the impacts of the growing season, plant species, and carbon amendments on FTW nitrate-N removal performance during the establishment year. Keywords: Best management practices, Carbon amendment, Floating treatment wetlands, Nitrogen removal, Spent coffee grounds

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Section: Caffeine Effectsmentioning

confidence: 99%

Nitrate Removal by Floating Treatment Wetlands Amended with Spent Coffee: A Mesocosm-Scale Evaluation

Keilhauer¹,

Messer²,

Mittelstet³

et al. 2019

Transactions of the ASABE

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“…Spent coffee grounds are produced in large quantities throughout the world; as one example, Sydney (NSW, Australia) with a population of 4.7 million produced around 3000 tonnes of spent coffee grounds annually . Only 7% of this spent coffee grounds were used in worm farms and gardens and 93% ended up in landfill where it poses a risk to environmental health with potential toxicity to aquatic organisms and production of greenhouse gases . Here, we studied the potential health benefits of spent coffee grounds in a rat model of metabolic syndrome induced by a high‐carbohydrate, high‐fat diet.…”

Section: Discussionmentioning

confidence: 99%

“…4 Only 7% of this spent coffee grounds were used in worm farms and gardens and 93% ended up in landfill 4 where it poses a risk to environmental health with potential toxicity to aquatic organisms and production of greenhouse gases. 40,41 Here, we studied the potential health benefits of spent coffee grounds in a rat model of metabolic syndrome induced by a high-carbohydrate, high-fat diet. Spent coffee grounds reduced body weight, abdominal fat, total body fat mass, systolic blood pressure, and concentrations of plasma triglycerides and non-esterified fatty acids along with improved glucose tolerance and structure and F I G U R E 5 Effect of spent coffee grounds supplementation on the ratio of Firmicutes and Bacteriodetes abundances (F/B) (natural log) in the gut of rats.…”

Section: Discussionmentioning

confidence: 99%

Modulation of gut microbiota by spent coffee grounds attenuates diet‐induced metabolic syndrome in rats

et al. 2020

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Coffee brewing produces spent coffee grounds as waste; few studies have investigated the health benefits of these grounds. This study investigated responses to spent coffee grounds in a diet‐induced rat model of metabolic syndrome. Male Wistar rats aged 8‐9 weeks were fed either corn starch‐rich diet or high‐carbohydrate, high‐fat diet for 16 weeks, which were supplemented with 5% spent coffee grounds during the last 8 weeks. Rats fed non‐supplemented diets were used as controls. High‐carbohydrate, high‐fat diet‐fed rats developed metabolic syndrome including abdominal obesity, impaired glucose tolerance, dyslipidemia, and cardiovascular and liver damage. Body weight, abdominal fat, total body fat mass, systolic blood pressure, and concentrations of plasma triglycerides and non‐esterified fatty acids were reduced by spent coffee grounds along with improved glucose tolerance and structure and function of heart and liver. Spent coffee grounds increased the diversity of the gut microbiota and decreased the ratio of Firmicutes to Bacteroidetes. Changes in gut microbiota correlated with the reduction in obesity and improvement in glucose tolerance and systolic blood pressure. These findings indicate that intervention with spent coffee grounds may be useful for managing obesity and metabolic syndrome by altering the gut microbiota, thus increasing the value of this food waste.

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“…During the extraction of the beverage from coffee powder with hot water, a large amount of residue is produced (SCG -spent coffee grounds), and considering the worldwide coffee consumption, it can be concluded that tons of coffee waste are generated from cafeterias and domestic production (2,3). SCG are the most abundant coffee by-product (45%) generated not only in the coffee beverage preparation but also during the instant coffee manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Production from Spent Coffee Grounds

Blinová

Bartošová

Sirotiak

2017

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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The residue after brewing the spent coffee grounds is an oil-containing waste material having a potential of being used as biodiesel feedstock. Biodiesel production from the waste coffee grounds oil involves collection and transportation of coffee residue, drying, oil extraction, and finally production of biodiesel. Different methods of oil extraction with organic solvents under different conditions show significant differences in the extraction yields. In the manufacturing of biodiesel from coffee oil, the level of reaction completion strongly depends on the quality of the feedstock oil. This paper presents an overview of oil extraction and a method of biodiesel production from spent coffee grounds.

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Impacts of discarded coffee waste on human and environmental health

Cited by 89 publications

References 52 publications

Nitrate Removal by Floating Treatment Wetlands Amended with Spent Coffee: A Mesocosm-Scale Evaluation

Nitrate Removal by Floating Treatment Wetlands Amended with Spent Coffee: A Mesocosm-Scale Evaluation

Modulation of gut microbiota by spent coffee grounds attenuates diet‐induced metabolic syndrome in rats

Biodiesel Production from Spent Coffee Grounds

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