Title:
Fresh Bovine Manure Standardization to Start Up Anaerobic Digestion in a Low-Cost Biodigester
Author(s):
Quintero, M., Alzate, M., Arboleda, A., Pinzón, Y.
Document(s):
Paper
Poster
Abstract:
In anaerobic digestion -AD- operating conditions influence on biogas production by affecting microbial populations. The aim of this work was to standardize conditions as diluent, dilution and agitation to stabilize fresh bovine manure -BM- to improve methane in the process. Biomethanization potential -BMP- , Solids consumption and specific methanogenic activity -SMA- were deterninated. The best condition was selected and it was scaled to a 23L and after to a rural tubular digester of 6.5 m3. Additionally, characterization of trophic groups of BM was performed using Most Probable Number -MPN- technique. According to results, the best operating conditions were using water as diluent with 1:3 ratio in a non-stirred system. SMA of 0.0486 gCOD L-1d-1 was obtained. The scale up showed that at chosen conditions, SMA reached 83% of the value obtained at laboratory level. Additonally, microbiological characterization demonstrates the development of trophic groups necessary for the start-up of AD process. Sulfate-reducing bacteria, acetogenic butyrate bacteria and acetoclastic methanogenic archaea were predominant groups. BM is suitable to start up AD due to the presence of all key trophic groups necessary to perform the metabolic steps. Selected conditions are cost-effective to be transferred to a low-cost biodigester stablished in a farm.
Keywords:
agricultural residues, anaerobic digestion, biogas, methane, manure, low-cost biodigester
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas production and biogas upgrading
Event:
26th European Biomass Conference and Exhibition
Session:
2CV.5.49
Pages:
821 - 826
ISBN:
978-88-89407-18-9
Paper DOI:
10.5071/26thEUBCE2018-2CV.5.49
Price:
FREE
