Evaluation of the toxic potential of coffee wastewater on seeds, roots and meristematic cells of Lactuca sativa L.

Aguiar, Luara Louzada; Andrade-Vieira, Larissa Fonseca; David, José

doi:10.1016/j.ecoenv.2016.07.019

Cited by 29 publications

(9 citation statements)

References 20 publications

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“…Although the specific composition of the soluble coffee processing wastewater is not known, studies associate the highly organic nature of the wastewater to macromolecules such as humic acids, lignins, tannins, phenols, polysaccharides, and proteins that contribute to its odor, dark color, and oxygen demand 59‐61 . In place of the specific composition, bulk characteristics for suspended solids, dissolved solids, and total organic content were used to represent the wastewater composition.…”

Section: Resultsmentioning

confidence: 99%

Environmental and process assessment of a vibratory nanofiltration system for the recovery of water from soluble coffee manufacturing waste

Wisniewski

Laurio

Slater

et al. 2020

Env Prog and Sustain Energy

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A case study has been conducted for the recovery of water from complex wastewater at a soluble coffee manufacturing factory. The study has evaluated separation methods for process intervention based on environmental and economic assessments. A novel vibratory field membrane separation was evaluated at the laboratory scale using actual factory wastewater, and was scaled‐up using appropriate design protocols. The recovery of water from an intermediate waste stream proved the most effective, both environmentally and economically. The proposed full‐scale vibratory membrane process recovers 378,541 L of water per day that meets specifications for reuse in the factory cooling tower. The proposed design reduced the daily well freshwater withdrawn by 21% and the amount of wastewater discharged from the factory by 28.5%. Annual operating costs were reduced by 22.5% and total life cycle emissions were reduced by 27.8%. These reductions are mainly the result of the reduced volume of wastewater discharged from the factory and the reduced energy requirement of the on‐site pretreatment processes. Economic assessment showed a net present value after 10 years is $181,100, while the payback time is under 3 years. Overall, the proposed vibratory membrane process used for water recovery presents favorable economics, and significant environmental emission reduction.

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Section: Resultsmentioning

confidence: 99%

Environmental and process assessment of a vibratory nanofiltration system for the recovery of water from soluble coffee manufacturing waste

Wisniewski

Laurio

Slater

et al. 2020

Env Prog and Sustain Energy

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“…Los resultados evidencian un pH ácido y una compleja composición química, asociada a la materia orgánica y sólidos disueltos en ambas muestras, por lo cual pueden generar efectos negativos. El alto contenido de sólidos genera colores oscuros en el agua, adicionalmente contienen cafeína, azúcares, proteínas y compuestos fenólicos [15][16][17][18], por lo cual son susceptibles a la fermentación y a la generación de olores ofensivos [16]. Cuando los residuos de café son vertidos a cuerpos hídricos se agota el oxígeno del agua, lo cual genera asfixia acuática; adicionalmente la descarga de nutrientes puede generar eutrofización [19].…”

Section: Resultados Y Discusiónunclassified

Caracterización fisicoquímica y microbiológica de aguas mieles del beneficio del café

Torres‐Valenzuela

Sanín-Villarrea

Arango-Ramírez

et al. 2019

rev.ion

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En el procesamiento del café, sólo se aprovecha el 5 % del producto fresco y se generan residuos como aguas mieles (AM), que pueden llegar hasta 40 L/kg de café pergamino seco y al ser vertidas pueden provocar contaminación de alto impacto ambiental. Consecuentemente, el objetivo fue caracterizar fisicoquímica y microbiológicamente dos muestras de AM (M1, M2) con el fin de evaluar el potencial en la extracción de biocomponentes. Los parámetros medidos a las dos muestras de agua fueron Demanda Química de Oxígeno (DQO), nitrógeno, amonio, cromo, oxígeno disuelto (OD), pH, conductividad, acidez volátil, fósforo, cloruros, sólidos, color y, adicionalmente se cuantificaron mesófilos, coliformes totales y estafilococos. Se identificaron diferencias significativas entre las muestras y un efecto del procesamiento del café, sobre las características evaluadas. M2 mostró mayor concentración de OD, conductividad y cambio de color respecto al control, mientras que M1 tuvo mayor concentración para los demás parámetros evaluados. Cromo y amonio estuvieron por debajo del límite de detección de la prueba empleada, por el contrario, la DQO fue superior a lo reglamentado para aguas domésticas. En el análisis microbiológico, se encontraron mesófilos en ambas muestras, y M2 presentó coliformes y estafilococos. Con lo anterior se evidencia que el método de procesamiento de café afecta los parámetros de calidad de las aguas residuales y por ende se deben implementar metodologías de tratamiento y/o aprovechamiento acordes a las características intrínsecas de cada proceso.

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“…Germinated seeds in each dish were counted after two days of exposure to the treatments, according to Aguiar et al (2016). Seeds showing evidence of root protrusion, visible without the aid of instruments, were considered germinated.…”

Section: Germinationmentioning

confidence: 99%

Biomonitors to evaluate the toxic potential of urban solid waste landfill leachate

Vieira

Droste

2019

Rev. ambiente água

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The accentuated increase in the production of solid urban waste (SUW) and the consequent accumulation of leachate in landfills increase the risk of environmental contamination. Biomonitors are used to assess the toxicity of pollutants on living organisms. In this study, the pollutant potential of leachate from SUW from a deactivated landfill was evaluated by bioassays with Lactuca sativa L. and Lycopersicon esculentum Mill., and the relationship between chemical characteristics of the effluent and biological parameters was analyzed. The effluent was tested in its raw form and diluted in distilled water at concentrations of 75 and 50%. The percentage of germination, root growth (RG), mitotic index (MI), chromosomal abnormalities index (CAI), and micronuclei frequency (MCN) were analyzed. In the presence of effluent, germination and MI decreased, while RG, CAI and MCN frequencies increased in relation to the negative control (distilled water) for both species. Lead, iron and zinc presented negative relation with seed germination for both species, with RG of L. sativa and MI of L. esculentum, as well as a positive relation with MCN frequency in the studied species. Because of its larger chromosomes, L. sativa is a more suitable biomonitor of SUW leachate toxicity than L. esculentum. Even though the landfill is deactivated, it is necessary to treat this effluent, in order to minimize environmental impacts.

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Evaluation of the toxic potential of coffee wastewater on seeds, roots and meristematic cells of Lactuca sativa L.

Cited by 29 publications

References 20 publications

Environmental and process assessment of a vibratory nanofiltration system for the recovery of water from soluble coffee manufacturing waste

Environmental and process assessment of a vibratory nanofiltration system for the recovery of water from soluble coffee manufacturing waste

Caracterización fisicoquímica y microbiológica de aguas mieles del beneficio del café

Biomonitors to evaluate the toxic potential of urban solid waste landfill leachate

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