Management options for coffee processing wastewater. A review

Alemayehu, Yitayal Addis; Leta, Seyoum; Tirfie, Tadesse Alemu

doi:10.1007/s10163-019-00953-y

Cited by 22 publications

(11 citation statements)

References 103 publications

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“…Figure 5 shows the experimental data for the adsorption equilibrium of the binary solution of CA and CGA on GAC at 25°C and pH set to 3. This pH value was selected considering that the residual water from the coffee production process has similar pH value (Haddis and Devi 2008;Selvamurugan et al 2010;Alemayehu et al 2020). The experimental data for the binary system was interpreted by the extended multicomponent Langmuir (EML) model, which is described in Equation 13.…”

Section: Individual and Binary Adsorption At Equilibriummentioning

confidence: 99%

Elucidation of adsorption mechanisms and mass transfer controlling resistances during single and binary adsorption of caffeic and chlorogenic acids

Hernández-Padilla

Zárate-Guzmán

González‐Ortega

et al. 2021

Environ Sci Pollut Res

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Section: Individual and Binary Adsorption At Equilibriummentioning

confidence: 99%

Elucidation of adsorption mechanisms and mass transfer controlling resistances during single and binary adsorption of caffeic and chlorogenic acids

Hernández-Padilla

Zárate-Guzmán

González‐Ortega

et al. 2021

Environ Sci Pollut Res

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“…In addition, coffee processing wastewater has a COD of 3,100-14,343 mg per liter and BOD of 5,000-35,000 mg per liter, which will cause water pollution and disrupt the water ecosystem if it is dumped directly into the river. Furthermore, coffee processing wastewater possesses all the qualities of polluted water that could negatively affect water bodies, soil, human health, and plants unless an appropriate wastewater treatment system is implemented [9].…”

Section: Introductionmentioning

confidence: 99%

Design of sustainable coffee processing wastewater treatment system using K-means clustering algorithm

Laili

Indrasti

Wahyudi

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Coffee processing wastewater has a COD of 3100-14343 mg per liter and a BOD of 5000-35000 mg per liter that will cause water pollution and may contaminate the water ecosystem if it is dumped directly into the environment. The literature shows that coffee processing wastewater requires special treatment to reduce the negative impact on the environment. This study develops a wastewater treatment system model capable of identifying sources of emissions and pollutants to increase the effectiveness of pollutant reduction. This study aims to analyse the coffee processing wastewater treatment system, define the most significant attribute, and develop a coffee processing wastewater treatment design using a K-means clustering method. A relief-feature selection method was used to analyze the most significant attribute of coffee processing wastewater related to certain specific wastewater treatment needed. This study used an unsupervised machine learning technique to develop clustering based on the most significant attribute of coffee processing wastewater using the K-Means method. The K-means clustering result shows five coffee processing wastewater treatment clusters based on BOD and Acidity. For clusters with BOD < 25.000 mg per liter: biological and chemical wastewater treatment will be applied through coagulation, adsorption, filtration, bio-filtration, and anaerobic microbial processes to separate pollutants. For clusters with BOD >25.000 mg/l: physical wastewater treatment will be applied through electro-coagulation.

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“…Según Estadísticas de Comercio Exterior Costa Rica (2017), esta cuenta con un valor aproximado de US$ 228 millones correspondientes a 1.451.100 fanegas (saco de 46 kg) exportadas [1]. El proceso de producción es altamente contaminante, ya que solo el 6% del peso total del grano se emplea para preparar la bebida y el resto son desechos sólidos como cascarilla, pulpa, mucílago y pergamino; y líquidos conocidos en la industria cafetalera como aguamiel [2,3]. El agua residual del procesamiento del café está compuesta mayoritariamente por agua, fibra y pectinas; por cada kilogramo de café en grano se generan 8 L de agua residual, con una demanda química de oxígeno en un rango de 1.000-100.000 mg/L y un pH entre tres y cinco, lo que clasifica este residuo como altamente contaminante para su vertido en cuerpos superficiales o alcantarillado sanitario.…”

Section: Introductionunclassified

Evaluación del desempeño de una celda de combustible microbiana con electrodo de grafito modificado para el tratamiento de agua residual del procesamiento del café

et al. 2022

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La actividad cafetalera en Costa Rica procesa aproximadamente 69.000 toneladas de café mediante la técnica de beneficiado húmedo. Esta actividad conlleva un alto impacto ambiental debido a la generación de 8 L de agua residual/kg de café oro producido. El presente trabajo tiene como objetivo utilizar el agua residual del procesamiento de café como sustrato en celdas combustibles microbianas (CCM), con el propósito de generar energía eléctrica a través de su uso y, a la vez, disminuir la carga orgánica del residuo. La CCM empleó un cátodo modificado con ftalocianinas de hierro (FePc), generó una eficiencia coulómbica de 0,7% y una densidad de potencia de 89 μW/cm2 en un ciclo de operación de cinco días. Además, se determinó que la CCM disminuye la demanda química de oxígeno (DQO) del residuo hasta en 27% bajo las condiciones de operación nativas del sustrato, a temperatura ambiente, sin mediadores químicos para la reacción anódica y con el uso de electrodos de platino para el cátodo. El estudio confirma la oportunidad de emplear el sustrato con una flora microbiana nativa apta para la operación de la tecnología de la CCM, y así perfilar el dispositivo como una opción novedosa para el tratamiento de este residuo en Costa Rica.

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Management options for coffee processing wastewater. A review

Cited by 22 publications

References 103 publications

Elucidation of adsorption mechanisms and mass transfer controlling resistances during single and binary adsorption of caffeic and chlorogenic acids

Elucidation of adsorption mechanisms and mass transfer controlling resistances during single and binary adsorption of caffeic and chlorogenic acids

Design of sustainable coffee processing wastewater treatment system using K-means clustering algorithm

Evaluación del desempeño de una celda de combustible microbiana con electrodo de grafito modificado para el tratamiento de agua residual del procesamiento del café

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