Reducción de la demanda química de oxígeno, coliformes, mohos y levaduras en mucílago de café mediante electrocoagulación

Luis Felipe Orozco; Katherin Castro-Ríos; Gonzalo Taborda Ocampo

doi:10.22490/21456453.975

Vol. 4 No. 1 (2013)

Published 2013-01-15

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Artículos de Investigación

Reduction in chemical oxygen demand, coliforms, molds and yeast in coffee mucilage through electrocoagulation

DOI: https://doi.org/10.22490/21456453.975

Luis Felipe Orozco Universidad de Caldas, Manizales, Colombia

Katherin Castro-Ríos Universidad de Caldas, Manizales, Colombia

Gonzalo Taborda Ocampo Universidad de Caldas, Manizales, Colombia Facultad de Ciencias Exactas.

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Abstract
References

Coffee pulp and mucilage are semi-liquid by-products involved in the generation of residual waters with a high concentration of organic matter and diverse species of microorganisms which negatively affect the efficiency of traditional treatment and require up to five months for total decontamination of these waters. This demands the testing of different treatment methods that can improve the efficiency of traditional processes. Electrocoagulation was tested with Fe/Al electrodes, 2.3 A and natural pH in a reduction in chemical oxygen demand and other microorganisms present in the coffee mucilage. The electrochemical process produced a maximum removal of 93% for coliform bacteria, molds and yeasts with a treatment time of 50 min. The reduction in chemical oxygen demand was 32% for the undiluted sample, 45% for the sample diluted to 50% (v/v), and 51% for sample diluted to 25% (v/v); indicating there is an increase in efficiency with a decrease in organic matter. The energy consumption was less than 0.083 kWh/m3 for the samples analyzed. This method is a viable alternative for the pre-treatment or reutilization of waters contaminated with coffee mucilage.

keywords: bacteria, electrochemical, molds, organic matter, coffee by-products

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How to Cite

Orozco, L. F., Castro-Ríos, K., & Taborda Ocampo, G. (2013). Reduction in chemical oxygen demand, coliforms, molds and yeast in coffee mucilage through electrocoagulation. Revista De Investigación Agraria Y Ambiental, 4(1), 13-19. https://doi.org/10.22490/21456453.975

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