Evaluation of the low technology tubular digesters in the production of biogas from slaughterhouse wastewater treatment

J. Martí-Herrero, René Alvarez Apaza, T. Flores

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17 Scopus citations

Abstract

The aim of this research is to identify the operational conditions and performance of low cost tubular digesters producing biogas from the slaughterhouse wastewater treatment. Three full scale sequenced tubular digesters (of more than 8 m3 each), operating in a slaughterhouse in Cochabamba (Bolivia), have been monitored during one year. The Organic Load Rate (OLR) varied from 0.04 to 1.13 kgSV/m3d (0.04–1.07 kgCOD/m3d), and the Hydraulic Retention Time (HRT) from 3.2 to 87.4 days. The passive solar heating design considered drove the slurry temperature to 27 °C, 8 °C more than mean ambient temperature. The first digester has been filled with soda bottle plastic rings in order to increase the internal effective surface and evaluate, obtaining that an increment in 67% of the internal effective surface, more than doubles the biogas production and enables higher OLRs. A Biogas Production Rate (BPR) peak of 0.2 m3/m3d was observed for OLR = 0.37 kgSV/m3d, HRT = 9.7d and Specific Biogas Production (SBP) = 0.55 m3/kgSV. COD removal achieves values above 70% from HRT>19 d. A comparison with other anaerobic digestion technologies demonstrates that low cost tubular digesters with biofilm carriers, are competitive for OLR<0.5 kg COD/m3d of biogas production, and for 0.25 kgCOD/m3d, when the focus is on COD removal.

Original languageEnglish
Pages (from-to)633-642
Number of pages10
JournalJournal of Cleaner Production
Volume199
DOIs
StatePublished - 20 Oct 2018

Bibliographical note

Funding Information:
Financial support to carry out this research was provided by Rada&Asociados, Hivos and the Endev-Bolivia Program of the GIZ , as well as the collaboration of the Caribbean and Latin American Biodigesters Net (RedBioLAC). Jaime Martí-Herrero is thankful to the Prometeo Project of the Secretariat for Higher Education, Science, Technology and Innovation of the Republic of Ecuador that funded part of his work, and to the financial support to CIMNE via the CERCA Programme/Generalitat de Catalunya. The authors wish to acknowledge the revision of the document by Samay Schütt.

Funding Information:
Financial support to carry out this research was provided by Rada&Asociados, Hivos and the Endev-Bolivia Program of the GIZ, as well as the collaboration of the Caribbean and Latin American Biodigesters Net (RedBioLAC). Jaime Martí-Herrero is thankful to the Prometeo Project of the Secretariat for Higher Education, Science, Technology and Innovation of the Republic of Ecuador that funded part of his work, and to the financial support to CIMNE via the CERCA Programme/Generalitat de Catalunya. The authors wish to acknowledge the revision of the document by Samay Schütt.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • Anaerobic digestion
  • Biofilm
  • Biogas production
  • Full scale
  • Low cost tubular digester
  • Slaughterhouse wastewater

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