Revista 29 - 1

Published

2009-01-01

Using electro-flotation/oxidation for reducing chemical oxygen demand, total organic carbon and total solids in vinasses

Reducción de demanda química de oxígeno, carbono orgánico total y sólidos totales en vinazas mediante electroflotación/oxidación

Keywords:

vinasse, electro-flotation, electro-Fenton, electro-oxidation, COD, TOC (en)
vinaza, electro-flotación, electro-fenton, electro-oxidación, DQO, TOC (es)

Downloads

Authors

  • Javier Dávila Rincón Llorreda S.A.
  • Fiderman Machuca Martínez Universidad del Valle
  • Nilson Marrianga Cabrales Universidad del Valle

The high chemical oxygen demand (COD) of vinasses from ethanol distilleries (greater than 130,000 mg/L) has led to exploring alternative treatments enabling their final disposition. The electro-flotation/oxidation of vinasses was thus experimentally evaluated regarding initial pH, electrolytic support (NaCl) and hydrogen peroxide concentration (H2O2), current density (CD) and several electrodes: iron, aluminum and galvanized steel. Its effect on reducing COD and total organic carbon (TOC) was studied, an initial 214,000 ppm COD value being reduced to 90,000 ppm, thereby representing a 58% reduction. The greatest reductions were achieved with galvanized steel electrodes, basic pH, 20 mA/cm2 and 60,000 ppm H2O2.

La alta demanda química de oxígeno (DQO) de las vinazas provenientes de destilerías de etanol (superior a 130.000 mg/L) obliga a explorar alternativas de tratamiento que permitan su disposición final. Por esto se evaluó el proceso de electroflotación/oxidación de vinaza en función de pH inicial, concentración de soporte electrolítico (NaCl), concentración de peróxido de hidrógeno (H2O2), densidad de corriente (DC) y distintos electrodos: hierro, aluminio y acero galvanizado. Se evaluó el efecto sobre la reducción de DQO y de carbono orgánico total (TOC), logrando reducir el DQO desde un valor inicial de 214.000 ppm hasta 90.000 ppm, lo que representa una reducción de 58%. Las mayores reducciones se lograron con electrodos de acero galvanizado, pH básico, 20 mA/cm2 y 60.000 ppm de H2O2.

References

Barrenechea Martel Ada., Coagulación., Química on line: www.bvsde.ops-oms.org/bvsatr/fulltext/tratamiento/manualI/tomoI/cuatro., Perú, 2004, pp. 152-224.

Chen, G., Electrochemical technologies in wastewater treatment., Separation and Purification Technology, 38, 2004, pp. 11-41.

Dávila, J. A., Tratamiento de vinazas de destilería por electrocoagulación/flotación/oxidación., Tesis de Maestría en Ingeniería Química, Universidad del Valle, 2008.

Decloux, M., Bories, A., Lewandowski, R., Fargues, C., Mersad, A., Lameloisea, M. L., Bonnet, F., Dherbecourt, B., Nieto, L., Interest of electrodialysis to reduce potassium level in vinasses., Preliminary experiments, Desalination 146, 2002, pp. 393 – 398.

Holt, P., Geoffrey, B., Mitchell, C., Electrocoagulation as a wastewater treatment., The Third Annual Australian Environmental Engineering Research Event, 23-26 November Castlemaine, Victoria, 1999, pp. 2 y 6.

Irdemez, S., Yildiz, S. Y., Tosunoglu, V., Optimization of phosphate removal from wastewater by electrocoagulation with aluminum plate electrodes., Separation and purification Technology, 52, 2006, pp. 394 – 401.

Janusz, A., Milewski, P. Lewicki, P., Demineralisation of vinasse by electrodialysis., Journal of Food Engineering, 7, 1988, pp. 177 – 196.

Kannan, N., Karthikeyan, G., Tamilselvan, N., Comparison of treatment potential of electrocoagulation of distillery effluent with and without activated areca catechu nut carbon., Journal of Hazardous Materials, Vol. 137, No. 3, 2006, pp. 1803 – 1809.

Liu, H., Wang, Ch., Li, X., Xuan, X. O., Jiang, Ch., Cui, H. N., A novel Electro-Fenton process for water treatment: Reaction controlled pH adjustment and performance assessment., Environ. Sci. Technol., 41, 2007, pp. 2937-2942.

Ramesh, R., Babu, N. S., Bhadrinarayana, K. M., Begum, M. E., Anantharaman, N., Treatment of tannery wastewater by electrocoagulation., Journal of the University of Chemical Technology and Metallurgy, 42, 2, 2007, pp. 201-206.

Yusuf, Y., EC and EF processes for the treatment of alcohol distillery wastewater., Separation and purification technology, 53, 2007, pp. 135 – 140.

Zayas, T., Rómero, V., Salgado L., Meraz, M., Morales, U., Applicability of coagulation/flocculation and electrochemical processes to the purification of biologically treated vinasse effluent., Separation and Purification Technology, 57, 2007, pp. 268–274.

License

Copyright (c) 2009 Javier Dávila Rincón, Fiderman Machuca Martínez, Nilson Marrianga Cabrales

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The authors or holders of the copyright for each article hereby confer exclusive, limited and free authorization on the Universidad Nacional de Colombia's journal Ingeniería e Investigación concerning the aforementioned article which, once it has been evaluated and approved, will be submitted for publication, in line with the following items:

1.    The version which has been corrected according to the evaluators' suggestions will be remitted and it will be made clear whether the aforementioned article is an unedited document regarding which the rights to be authorized are held and total responsibility will be assumed by the authors for the content of the work being submitted to Ingeniería e Investigación, the Universidad Nacional de Colombia and third-parties;

2.    The authorization conferred on the journal will come into force from the date on which it is included in the respective volume and issue of Ingeniería e Investigación in the Open Journal Systems and on the journal's main page (https://revistas.unal.edu.co/index.php/ingeinv), as well as in different databases and indices in which the publication is indexed;

3.    The authors authorize the Universidad Nacional de Colombia's journal Ingeniería e Investigación to publish the document in whatever required format (printed, digital, electronic or whatsoever known or yet to be discovered form) and authorize Ingeniería e Investigación to include the work in any indices and/or search engines deemed necessary for promoting its diffusion;

4.    The authors accept that such authorization is given free of charge and they, therefore, waive any right to receive remuneration from the publication, distribution, public communication and any use whatsoever referred to in the terms of this authorization.