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Argelia Cervantes
arg poster

Emmanuel Chavarria cheve poster

PRESENTATION: Both interns presented at the 12th Annual Conference On The Americas
(An Interdisciplinary and Inter-cultural Conference), February 6-7, 2009. Atlanta, Georgia. Presentation

MEDIA COVERAGE: Argelia Cervantes and Emmanuel Chavarria interviewed by Impresso Milenio >>


Argelia Cervantes Ovalle, Jesus Emmanuel Chavarria Palma

Research projects:

  • Argelia Ovalle Cervantes: “Studies on microbial diversity of anaerobic digesters using animal wastes and algae as feedstock with and without the addition of biochar as stimulant”

     Objective: to identify and characterize the microbial diversity present in anaerobic digesters fed with animal wastes and algae in order to understand their dynamics and performance in relation to variations in digester operation conditions. The best performing reactors with various combinations of feedstock viz. 75% dairy manure + 25% Algae and 100% poultry litter with and without the addition of 2.5 and 5% charcoal were used for characterizing the microbial diversity. DNA samples were extracted from the feedstock present in the reactors and amplified for microbial identification.

  • Jesus Emmanuel Chavarria Palma: “Enhanced biogas production from livestock wastes and algal biomass in Fed-batch digesters”

Objective: to evaluate the effect of biochar addition (5, 7 and 10% levels) in a fed-batch anaerobic digestion process using 75% dairy manure +25% algae mix as feedstock. Experiment was conducted in 2L capacity reactors with butyl rubber stoppers in fed-batch mode, with working volume of 500 mL. Comparatively, the co-digestion treatment containing 75% dairy manure + 25% algae with 7% biochar recorded highest biogas production (4.89 L) followed by the treatment added with 10% biochar (4.76 L) and 5% biochar (4.27 L). The treatment with 10% char recorded 70% methane concentration on 42nd day. Treatments containing 7 and 10% char recorded 70% methane concentration on 52nd day.

Research results summary >>

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