Vol. 29 No. 1 (2016): Revista ION
Articles

Anaerobic co-digestion of municipal sewage sludge with food waste

Ileana Consuelo Julio Guerrero
Grupo GAIA, Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia UdeA
Carlos Alberto Peláez Jaramillo
Grupo GIEM, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA
Francisco José Molina Perez
Grupo GAIA, Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia UdeA

Published 2016-07-15

Keywords

  • Co-digestion,
  • Methane Yield,
  • Primary Sewage Sludge,
  • Thickened Secondary Sludge,
  • Food Waste.

How to Cite

Julio Guerrero, I. C., Peláez Jaramillo, C. A., & Molina Perez, F. J. (2016). Anaerobic co-digestion of municipal sewage sludge with food waste. Revista ION, 29(1). https://doi.org/10.18273/revion.v29n1-2016005

Abstract

Anaerobic digestion is a process widely used for the treatment of sludge generated during wastewater treatment, due to its technical and economic advantages. This paper presents a study in which the co digestion of sewage sludge with food waste (FW) was evaluated as a strategy for optimizing the digestion of sludge. Mono-digestions and co-digestions of the substrates were performed under  mesophilic conditions (35°C) using batch reactors. The sludge used were: primary sludge (PS), thickened secondary sludge (TSS), and a mixture of PS with TSS in a ratio 60:40 based on total solids (PS:TSS).The co-digestions were performed using different ratios of mixtures of the substrates based on total volatile solids: PS:FW=30:70, PS:FW=50:50, PS:FW=70:30 y (PS+TSS):FW=70:30. The maximum methane yield, 0,25LCH4/gVSadded, was obtained for the mixture PS:FW=30:70, showing a yield 32% higher than the one obtained in the mono-digestion of PS.

 

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