Low cost biofilm to improve anaerobic digestion in cold climate regions with tubular digesters

Jaime Martí Herrero; René Alvarez; Limbaniac Aliaga; Rolando Céspedes Paredes; Ja. Carbonell

Authors

  • Jaime Martí Herrero Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Building Energy and Environment Group, Edifici GAIA (TR14), C/ Rambla Sant Nebridi 22, 08222 Terrassa,
  • René Álvarez IIDEPROQ, Universidad Mayor de San Andrés.
  • Limbaniac Aliaga Estación Experimental Choquenaira, Facultad de Agronomía, Universidad Mayor de San Andrés
  • Rolando Céspedes Paredes Docente, Facultad de Agronomía, Universidad Mayor de San Andrés.
  • Ja Carbonell Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Building Energy and Environment Group, Edifici GAIA (TR14), C/ Rambla Sant Nebridi 22, 08222 Terrassa.

Keywords:

anaerobic digestion, biofilm carrier, solid retention time, cold weather, low cost tubular digester

Abstract

The objective of this research is to evaluate the increase of biogas production with low cost tubular digesters in cold climates using PET rings inside the reactor. Two similar digesters have been operated and monitored in cold weather conditions and have been fed with cow manure. The difference between the two systems is that one was filled with PET rings as a biofilm carrier, becoming the "functional" area inside the digester 4.2 times greater. The results show that 44% more biogas per KgSV occurred when the biofilm carrier (0.33m3 / kgSV, 0.09 m3 / m3 / d) was used in relation to a control digester (0.23m3 / kgSV, 0.06m3 / m3 / D), which is operated under the same cold climatic conditions and with an organic loading rate of 0.26 kgSV / m3 / d. The biogas quality is similar in both cases, while the reduction of the total volatile solids as well as the retention of mineral solids is higher in the digester with the biofilm carrier. Thermal performance reveals that adaptation of the low cost tubular digester for a cold climate without any active heating device led to a suspension temperature of 16.6 ° C, when the average daily ambient temperature in winter is 6.1 ° C with several nights below Of zero, due to the appropriate solar passive design.

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Published

2014-12-31

How to Cite

Martí Herrero, J., Álvarez, R., Aliaga, L., Céspedes Paredes, R., & Carbonell, J. (2014). Low cost biofilm to improve anaerobic digestion in cold climate regions with tubular digesters: Jaime Martí Herrero; René Alvarez; Limbaniac Aliaga; Rolando Céspedes Paredes; Ja. Carbonell. Revista De Investigación E Innovación Agropecuaria Y De Recursos Naturales, 1(1), 81–91. Retrieved from https://riiarn.umsa.bo/index.php/RIIARn/article/view/37

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